diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index 013f484..5758755 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -8,9 +8,11 @@ import { useThemeStore } from '@/store/themeStore';
 import { ErrorBoundary } from '@/components/common/ErrorBoundary';
 import { useToast } from '@/components/ui/Toast';
 import { useOnlineStatus } from '@/hooks/useOnlineStatus';
+import { useTranslation } from 'react-i18next';
 
 
 function QueryClientWrapper({ children }: { children: React.ReactNode }) {
+  const { t } = useTranslation();
   const toast = useToast();
 
   const [queryClient] = React.useState(() => new QueryClient({
@@ -40,18 +42,20 @@ function QueryClientWrapper({ children }: { children: React.ReactNode }) {
 }
 
 function OfflineBanner() {
+  const { t } = useTranslation();
   const isOnline = useOnlineStatus();
 
   if (isOnline) return null;
 
   return (
     <div className="fixed top-0 left-0 right-0 z-[200] bg-warning-500 text-white text-center py-2 px-4 text-sm font-medium shadow-md">
-      Sie sind offline. Änderungen werden gespeichert wenn die Verbindung wiederhergestellt ist.
+      {t('app.siesindofflineänderungenwerdengespeicher')}
     </div>
   );
 }
 
 export default function App() {
+  const { t } = useTranslation();
   const { logout } = useAuthStore();
   const loadThemeFromStorage = useThemeStore((s) => s.loadFromStorage);
   const toast = useToast();
@@ -76,7 +80,7 @@ export default function App() {
         href="#main-content"
         className="sr-only focus:not-sr-only focus:absolute focus:top-2 focus:left-2 focus:z-[300] focus:px-4 focus:py-2 focus:bg-primary-600 focus:text-white focus:rounded-md"
       >
-        Zum Hauptinhalt springen
+        {t('app.zumhauptinhaltspringen')}
       </a>
       <ErrorBoundary>
         <AppRouter />
diff --git a/frontend/src/components/activity/ActivityFilter.tsx b/frontend/src/components/activity/ActivityFilter.tsx
index e670683..32b1181 100644
--- a/frontend/src/components/activity/ActivityFilter.tsx
+++ b/frontend/src/components/activity/ActivityFilter.tsx
@@ -80,7 +80,7 @@ export function ActivityFilter({ onFilter, initialValues }: ActivityFilterProps)
             type="text"
             value={user}
             onChange={(e) => setUser(e.target.value)}
-            placeholder="Benutzername"
+            placeholder={t('activityFilter.benutzername')}
             className="block w-full rounded-md border border-secondary-300 px-3 py-2 text-base min-h-touch text-secondary-900 focus:outline-none focus:ring-2 focus:ring-primary-500 focus:border-primary-500"
           />
         </div>
diff --git a/frontend/src/components/ai/ImprovementPanel.tsx b/frontend/src/components/ai/ImprovementPanel.tsx
index cca6328..07f4f87 100644
--- a/frontend/src/components/ai/ImprovementPanel.tsx
+++ b/frontend/src/components/ai/ImprovementPanel.tsx
@@ -6,10 +6,12 @@
 import { useState } from 'react';
 import { useSignals, useCollectSignals, usePatterns, useDetectPatterns, useProposals, useEvaluateProposal, useActivateProposal, useRollbackProposal, useMeasureImpact } from '@/api/improvement';
 import { TrendingUp, AlertCircle, CheckCircle, RefreshCw, Play, RotateCcw, BarChart3 } from 'lucide-react';
+import { useTranslation } from 'react-i18next';
 
 type SubView = 'signals' | 'patterns' | 'proposals';
 
 export function ImprovementPanel() {
+  const { t } = useTranslation();
   const [subView, setSubView] = useState<SubView>('signals');
 
   return (
@@ -47,6 +49,7 @@ export function ImprovementPanel() {
 }
 
 function SignalsView() {
+  const { t } = useTranslation();
   const { data, isLoading } = useSignals(1, 20);
   const collectMut = useCollectSignals();
   const signals = data?.items ?? [];
@@ -59,7 +62,7 @@ function SignalsView() {
           onClick={() => collectMut.mutate({ limit: 100 })}
           disabled={collectMut.isPending}
           className="inline-flex items-center gap-1 px-2 py-1 rounded text-xs font-medium text-primary-600 hover:bg-primary-50 disabled:opacity-50 min-h-touch"
-          aria-label="Signale sammeln"
+          aria-label={t('improvementPanel.signalesammeln')}
         >
           <RefreshCw className={`w-3 h-3 ${collectMut.isPending ? 'animate-spin' : ''}`} aria-hidden="true" strokeWidth={2} />
           Sammeln
@@ -68,7 +71,7 @@ function SignalsView() {
 
       {isLoading && <p className="text-sm text-secondary-400 text-center py-4">Laden...</p>}
       {!isLoading && signals.length === 0 && (
-        <p className="text-sm text-secondary-400 text-center py-4">Keine Signale. Klicken Sie auf „Sammeln" um zu starten.</p>
+        <p className="text-sm text-secondary-400 text-center py-4">{t('improvementPanel.keinesignaleklickensieaufsammeln')}</p>
       )}
 
       {signals.map(s => (
@@ -92,6 +95,7 @@ function SignalsView() {
 }
 
 function PatternsView() {
+  const { t } = useTranslation();
   const { data, isLoading } = usePatterns(1, 20);
   const detectMut = useDetectPatterns();
   const patterns = data?.items ?? [];
@@ -104,7 +108,7 @@ function PatternsView() {
           onClick={() => detectMut.mutate({ min_occurrences: 2 })}
           disabled={detectMut.isPending}
           className="inline-flex items-center gap-1 px-2 py-1 rounded text-xs font-medium text-primary-600 hover:bg-primary-50 disabled:opacity-50 min-h-touch"
-          aria-label="Muster erkennen"
+          aria-label={t('improvementPanel.mustererkennen')}
         >
           <TrendingUp className={`w-3 h-3 ${detectMut.isPending ? 'animate-pulse' : ''}`} aria-hidden="true" strokeWidth={2} />
           Erkennen
@@ -113,7 +117,7 @@ function PatternsView() {
 
       {isLoading && <p className="text-sm text-secondary-400 text-center py-4">Laden...</p>}
       {!isLoading && patterns.length === 0 && (
-        <p className="text-sm text-secondary-400 text-center py-4">Keine Muster. Sammeln Sie zuerst Signale und klicken Sie dann auf „Erkennen".</p>
+        <p className="text-sm text-secondary-400 text-center py-4">{t('improvementPanel.keinemustersammelnsiezuerstsignale')}</p>
       )}
 
       {patterns.map(p => (
@@ -143,6 +147,7 @@ function PatternsView() {
 }
 
 function ProposalsView() {
+  const { t } = useTranslation();
   const { data, isLoading } = useProposals(1, 20);
   const evalMut = useEvaluateProposal();
   const activateMut = useActivateProposal();
@@ -168,7 +173,7 @@ function ProposalsView() {
 
       {isLoading && <p className="text-sm text-secondary-400 text-center py-4">Laden...</p>}
       {!isLoading && proposals.length === 0 && (
-        <p className="text-sm text-secondary-400 text-center py-4">Keine Vorschläge.</p>
+        <p className="text-sm text-secondary-400 text-center py-4">{t('improvementPanel.keinevorschläge')}</p>
       )}
 
       {proposals.map(p => (
@@ -191,7 +196,7 @@ function ProposalsView() {
                 onClick={() => evalMut.mutate(p.id)}
                 disabled={evalMut.isPending}
                 className="inline-flex items-center gap-1 px-2 py-1 rounded text-[11px] font-medium text-blue-600 hover:bg-blue-50 disabled:opacity-50 min-h-touch"
-                aria-label="Evaluieren"
+                aria-label={t('improvementPanel.evaluieren')}
               >
                 <Play className="w-3 h-3" aria-hidden="true" strokeWidth={2} />
                 Evaluieren
@@ -202,7 +207,7 @@ function ProposalsView() {
                 onClick={() => activateMut.mutate(p.id)}
                 disabled={activateMut.isPending}
                 className="inline-flex items-center gap-1 px-2 py-1 rounded text-[11px] font-medium text-green-600 hover:bg-green-50 disabled:opacity-50 min-h-touch"
-                aria-label="Aktivieren"
+                aria-label={t('improvementPanel.aktivieren')}
               >
                 <CheckCircle className="w-3 h-3" aria-hidden="true" strokeWidth={2} />
                 Aktivieren
@@ -214,7 +219,7 @@ function ProposalsView() {
                   onClick={() => rollbackMut.mutate({ proposalId: p.id, reason: 'Manual rollback' })}
                   disabled={rollbackMut.isPending}
                   className="inline-flex items-center gap-1 px-2 py-1 rounded text-[11px] font-medium text-danger-600 hover:bg-danger-50 disabled:opacity-50 min-h-touch"
-                  aria-label="Rollback"
+                  aria-label={t('improvementPanel.rollback')}
                 >
                   <RotateCcw className="w-3 h-3" aria-hidden="true" strokeWidth={2} />
                   Rollback
@@ -223,7 +228,7 @@ function ProposalsView() {
                   onClick={() => measureMut.mutate(p.id)}
                   disabled={measureMut.isPending}
                   className="inline-flex items-center gap-1 px-2 py-1 rounded text-[11px] font-medium text-purple-600 hover:bg-purple-50 disabled:opacity-50 min-h-touch"
-                  aria-label="Impact messen"
+                  aria-label={t('improvementPanel.impactmessen')}
                 >
                   <BarChart3 className="w-3 h-3" aria-hidden="true" strokeWidth={2} />
                   Messen
diff --git a/frontend/src/components/ai/SuggestionBadge.tsx b/frontend/src/components/ai/SuggestionBadge.tsx
index c5abe9a..980027d 100644
--- a/frontend/src/components/ai/SuggestionBadge.tsx
+++ b/frontend/src/components/ai/SuggestionBadge.tsx
@@ -1,11 +1,13 @@
 import { useState, useEffect } from 'react';
 import { apiClient } from '@/api/client';
+import { useTranslation } from 'react-i18next';
 
 interface SuggestionBadgeProps {
   onClick: () => void;
 }
 
 export function SuggestionBadge({ onClick }: SuggestionBadgeProps) {
+  const { t } = useTranslation();
   const [count, setCount] = useState(0);
   const [pulsing, setPulsing] = useState(false);
 
@@ -31,7 +33,7 @@ export function SuggestionBadge({ onClick }: SuggestionBadgeProps) {
       <button
         onClick={onClick}
         className="relative p-2 text-gray-500 hover:text-gray-700 transition-colors min-h-touch min-w-touch"
-        title="KI Vorschläge"
+        title={t('suggestionBadge.kivorschläge')}
       >
         🤖
       </button>
diff --git a/frontend/src/components/ai/SuggestionCard.tsx b/frontend/src/components/ai/SuggestionCard.tsx
index 97501b5..e8e2af1 100644
--- a/frontend/src/components/ai/SuggestionCard.tsx
+++ b/frontend/src/components/ai/SuggestionCard.tsx
@@ -1,5 +1,6 @@
 import { useState } from 'react';
 import type { Suggestion } from '@/api/aiProactive';
+import { useTranslation } from 'react-i18next';
 
 const typeConfig = {
   info: { icon: '💡', color: 'blue', bg: 'bg-blue-50', border: 'border-blue-200', text: 'text-blue-700', bar: 'bg-blue-500' },
@@ -15,6 +16,7 @@ interface SuggestionCardProps {
 }
 
 export function SuggestionCard({ suggestion, onDismiss, onAct }: SuggestionCardProps) {
+  const { t } = useTranslation();
   const [expanded, setExpanded] = useState(false);
   const config = typeConfig[suggestion.suggestion_type] || typeConfig.info;
   const confidencePercent = Math.round(suggestion.confidence * 100);
@@ -32,7 +34,7 @@ export function SuggestionCard({ suggestion, onDismiss, onAct }: SuggestionCardP
         <button
           onClick={() => onDismiss(suggestion.id)}
           className="text-gray-400 hover:text-gray-600 transition-colors"
-          title="Ignorieren"
+          title={t('suggestionCard.ignorieren')}
         >
           ✕
         </button>
@@ -86,7 +88,7 @@ export function SuggestionCard({ suggestion, onDismiss, onAct }: SuggestionCardP
       {/* Acted upon badge */}
       {suggestion.is_acted_upon && (
         <div className="mt-2 text-xs text-green-600 font-medium flex items-center gap-1">
-          ✓ Ausgeführt
+          {t('suggestionCard.ausgeführt')}
         </div>
       )}
     </div>
diff --git a/frontend/src/components/ai/SuggestionSidebar.tsx b/frontend/src/components/ai/SuggestionSidebar.tsx
index 5e2579d..3dfea2a 100644
--- a/frontend/src/components/ai/SuggestionSidebar.tsx
+++ b/frontend/src/components/ai/SuggestionSidebar.tsx
@@ -1,6 +1,7 @@
 import { useState } from 'react';
 import { useSuggestions } from '@/api/aiProactive';
 import { SuggestionCard } from '@/components/ai/SuggestionCard';
+import { useTranslation } from 'react-i18next';
 
 interface SuggestionSidebarProps {
   isOpen: boolean;
@@ -20,6 +21,7 @@ const filterOptions = [
  * Used inside the AISidebar proactive tab.
  */
 export function SuggestionList() {
+  const { t } = useTranslation();
   const { suggestions, connected, dismiss, act } = useSuggestions();
   const [filter, setFilter] = useState<string>('all');
 
@@ -64,8 +66,8 @@ export function SuggestionList() {
         {filteredSuggestions.length === 0 ? (
           <div className="flex flex-col items-center justify-center h-full text-secondary-400">
             <div className="text-4xl mb-3">🤖</div>
-            <p className="text-sm">Keine Vorschläge vorhanden</p>
-            <p className="text-xs mt-1">Die KI analysiert deinen Kontext...</p>
+            <p className="text-sm">{t('suggestionSidebar.keinevorschlägevorhanden')}</p>
+            <p className="text-xs mt-1">{t('suggestionSidebar.diekianalysiertdeinenkontext')}</p>
           </div>
         ) : (
           <div className="space-y-2">
@@ -89,6 +91,7 @@ export function SuggestionList() {
  * Uses SuggestionList internally.
  */
 export function SuggestionSidebar({ isOpen, onClose }: SuggestionSidebarProps) {
+  const { t } = useTranslation();
   return (
     <>
       {/* Overlay */}
@@ -108,7 +111,7 @@ export function SuggestionSidebar({ isOpen, onClose }: SuggestionSidebarProps) {
         {/* Header */}
         <div className="flex items-center justify-between p-4 border-b border-gray-200">
           <div className="flex items-center gap-2">
-            <h2 className="font-semibold text-gray-800">KI Vorschläge</h2>
+            <h2 className="font-semibold text-gray-800">{t('suggestionSidebar.kivorschläge')}</h2>
           </div>
           <button
             onClick={onClose}
diff --git a/frontend/src/components/comm/blocks/BlockRenderer.tsx b/frontend/src/components/comm/blocks/BlockRenderer.tsx
index f3c4823..b25cadf 100644
--- a/frontend/src/components/comm/blocks/BlockRenderer.tsx
+++ b/frontend/src/components/comm/blocks/BlockRenderer.tsx
@@ -8,12 +8,14 @@ import VideoBlock from './VideoBlock';
 import FileBlock from './FileBlock';
 import { getBlockComponent } from './registry';
 import './registrations'; // plugin-contributed block registrations
+import { useTranslation } from 'react-i18next';
 
 interface BlockRendererProps {
   blocks: MessageBlock[];
 }
 
 const BlockRenderer: React.FC<BlockRendererProps> = ({ blocks }) => {
+    const { t } = useTranslation();
   if (!blocks || blocks.length === 0) {
     return null;
   }
@@ -55,7 +57,7 @@ const BlockRenderer: React.FC<BlockRendererProps> = ({ blocks }) => {
               // Fallback for unknown block types
               return (
                 <div className="text-xs text-secondary-400 italic p-2 rounded bg-secondary-50">
-                  Unbekannter Block-Typ: {block.block_type}
+                  {t('blockRenderer.unbekannterblocktyp')} {block.block_type}
                 </div>
               );
             }
diff --git a/frontend/src/components/comm/blocks/ContactCardBlock.tsx b/frontend/src/components/comm/blocks/ContactCardBlock.tsx
index e4b899b..c80acbb 100644
--- a/frontend/src/components/comm/blocks/ContactCardBlock.tsx
+++ b/frontend/src/components/comm/blocks/ContactCardBlock.tsx
@@ -1,12 +1,14 @@
 import React from 'react';
 import type { MessageBlock } from '@/store/commStore';
 import { ChevronRight } from 'lucide-react';
+import { useTranslation } from 'react-i18next';
 
 interface ContactCardBlockProps {
   block: MessageBlock;
 }
 
 const ContactCardBlock: React.FC<ContactCardBlockProps> = ({ block }) => {
+    const { t } = useTranslation();
   const { contact_id, name } = block.block_data;
 
   const contactName: string = name || 'Unbekannter Kontakt';
@@ -30,7 +32,7 @@ const ContactCardBlock: React.FC<ContactCardBlockProps> = ({ block }) => {
       </div>
       <div className="flex-1 min-w-0">
         <p className="text-sm font-medium text-secondary-700 truncate">{contactName}</p>
-        <p className="text-xs text-secondary-400">Kontakt anzeigen</p>
+        <p className="text-xs text-secondary-400">{t('contactCardBlock.kontaktanzeigen')}</p>
       </div>
       <ChevronRight className="w-4 h-4 text-secondary-400 flex-shrink-0" aria-hidden="true" strokeWidth={2} />
     </a>
diff --git a/frontend/src/components/comm/blocks/MiniAppBlock.tsx b/frontend/src/components/comm/blocks/MiniAppBlock.tsx
index e305a0e..41d6c74 100644
--- a/frontend/src/components/comm/blocks/MiniAppBlock.tsx
+++ b/frontend/src/components/comm/blocks/MiniAppBlock.tsx
@@ -2,6 +2,7 @@ import React, { useState, useEffect } from 'react';
 import type { MessageBlock } from '@/store/commStore';
 import { AppWindow, Loader2 } from 'lucide-react';
 import { apiClient } from '@/api/client';
+import { useTranslation } from 'react-i18next';
 
 interface MiniAppBlockProps {
   block: MessageBlock;
@@ -17,6 +18,7 @@ interface MiniAppDef {
 }
 
 const MiniAppBlock: React.FC<MiniAppBlockProps> = ({ block }) => {
+    const { t } = useTranslation();
   const { app_id, config } = block.block_data;
   const [appDef, setAppDef] = useState<MiniAppDef | null>(null);
   const [loading, setLoading] = useState(false);
@@ -88,7 +90,7 @@ const MiniAppBlock: React.FC<MiniAppBlockProps> = ({ block }) => {
       )}
 
       {!hasConfig && !hasSchema && (
-        <p className="text-xs text-secondary-400 text-center py-2">Keine Konfiguration</p>
+        <p className="text-xs text-secondary-400 text-center py-2">{t('miniAppBlock.keinekonfiguration')}</p>
       )}
     </div>
   );
diff --git a/frontend/src/components/common/EntityHistoryPanel.tsx b/frontend/src/components/common/EntityHistoryPanel.tsx
index 5974362..58c10d7 100644
--- a/frontend/src/components/common/EntityHistoryPanel.tsx
+++ b/frontend/src/components/common/EntityHistoryPanel.tsx
@@ -217,8 +217,9 @@ function TimelineEntry({
  * Loading skeleton — 3 placeholder entries.
  */
 function LoadingSkeleton() {
+  const { t } = useTranslation();
   return (
-    <div className="space-y-4 animate-pulse" aria-label="Loading history">
+    <div className="space-y-4 animate-pulse" aria-label={t('entityHistoryPanel.loadinghistory')}>
       {[0, 1, 2].map(i => (
         <div key={i} className="flex gap-3">
           <div className="w-8 h-8 rounded-full bg-secondary-200 flex-shrink-0" />
diff --git a/frontend/src/components/common/PrintButton.tsx b/frontend/src/components/common/PrintButton.tsx
index d1e1a3f..cc83938 100644
--- a/frontend/src/components/common/PrintButton.tsx
+++ b/frontend/src/components/common/PrintButton.tsx
@@ -7,6 +7,7 @@ import React, { useState, useRef, useEffect, useCallback } from 'react';
 import clsx from 'clsx';
 import { Printer, FileDown, ChevronDown } from 'lucide-react';
 import { printElement, printCurrentPage, exportToPDF } from '@/utils/print';
+import { useTranslation } from 'react-i18next';
 
 export interface PrintButtonProps {
   /** Element id to print. If omitted, prints the whole page. */
@@ -22,6 +23,7 @@ export function PrintButton({
   filename = 'export',
   className,
 }: PrintButtonProps) {
+  const { t } = useTranslation();
   const [open, setOpen] = useState(false);
   const containerRef = useRef<HTMLDivElement>(null);
 
@@ -79,8 +81,8 @@ export function PrintButton({
         )}
         aria-haspopup="menu"
         aria-expanded={open}
-        aria-label="Drucken oder als PDF exportieren"
-        title="Drucken / PDF"
+        aria-label={t('printButton.druckenoderalspdfexportieren')}
+        title={t('printButton.druckenpdf')}
         data-testid="print-button-trigger"
       >
         <Printer className="w-4 h-4" aria-hidden="true" strokeWidth={2} />
@@ -128,7 +130,7 @@ export function PrintButton({
             data-testid="print-button-pdf"
           >
             <FileDown className="w-4 h-4 text-secondary-500" aria-hidden="true" strokeWidth={2} />
-            <span>Als PDF</span>
+            <span>{t('printButton.alspdf')}</span>
           </button>
         </div>
       )}
diff --git a/frontend/src/components/common/SaveFilterDialog.tsx b/frontend/src/components/common/SaveFilterDialog.tsx
index 0d0f762..2cb6c7a 100644
--- a/frontend/src/components/common/SaveFilterDialog.tsx
+++ b/frontend/src/components/common/SaveFilterDialog.tsx
@@ -28,6 +28,7 @@ export interface SaveFilterDialogProps {
  * Empty / null / undefined values are omitted.
  */
 function CriteriaSummary({ criteria }: { criteria: Record<string, any> }) {
+  const { t } = useTranslation();
   const entries = Object.entries(criteria).filter(
     ([, v]) => v !== null && v !== undefined && v !== ''
   );
@@ -35,7 +36,7 @@ function CriteriaSummary({ criteria }: { criteria: Record<string, any> }) {
   if (entries.length === 0) {
     return (
       <p className="text-sm text-secondary-400 italic">
-        Keine aktiven Filterkriterien
+        {t('saveFilterDialog.keineaktivenfilterkriterien')}
       </p>
     );
   }
@@ -85,6 +86,7 @@ export function SaveFilterDialog({
   );
 
   const handleSave = async () => {
+    const { t } = useTranslation();
     const trimmed = name.trim();
     if (!trimmed) return;
     setSubmitting(true);
diff --git a/frontend/src/components/common/ShareDialog.tsx b/frontend/src/components/common/ShareDialog.tsx
index 52269c5..c8e17ed 100644
--- a/frontend/src/components/common/ShareDialog.tsx
+++ b/frontend/src/components/common/ShareDialog.tsx
@@ -25,6 +25,7 @@ import {
 import { useUsers } from '@/api/users';
 import { useGroups } from '@/api/groups';
 import type { EntityPermission, PermissionLevel } from '@/api/entityPermissions';
+import { useTranslation } from 'react-i18next';
 
 interface ShareDialogProps {
   entityType: string;
@@ -51,6 +52,7 @@ function permLabel(level: string) {
 }
 
 export function ShareDialog({ entityType, entityId, entityName, onClose }: ShareDialogProps) {
+  const { t } = useTranslation();
   const { data: permData, isLoading } = useEntityPermissions(entityType, entityId);
   const { data: accessData } = useEntityAccess(entityType, entityId);
   const { data: usersData } = useUsers(1, 100);
@@ -133,7 +135,7 @@ export function ShareDialog({ entityType, entityId, entityName, onClose }: Share
           <button
             onClick={onClose}
             className="text-secondary-400 hover:text-secondary-600 p-1 rounded-md hover:bg-secondary-100"
-            aria-label="Schließen"
+            aria-label={t('shareDialog.schließen')}
           >
             <X className="w-5 h-5" strokeWidth={2} />
           </button>
@@ -143,10 +145,9 @@ export function ShareDialog({ entityType, entityId, entityName, onClose }: Share
         <div className="flex-1 overflow-y-auto px-5 py-4">
           {/* Info banner */}
           <div className="mb-4 p-3 bg-primary-50 border border-primary-200 rounded-lg text-sm text-primary-700">
-            <p className="font-medium mb-1">Element teilen</p>
+            <p className="font-medium mb-1">{t('shareDialog.elementteilen')}</p>
             <p className="text-primary-600">
-              Gewähre Benutzern oder Gruppen Zugriff auf dieses Element. Die Berechtigungsstufe bestimmt,
-              welche Aktionen durchgeführt werden können.
+              {t('shareDialog.gewährebenutzernodergruppenzugriffauf')}
             </p>
           </div>
 
@@ -168,7 +169,7 @@ export function ShareDialog({ entityType, entityId, entityName, onClose }: Share
             <div className="text-sm text-secondary-400 py-4 text-center">Laden…</div>
           ) : permissions.length === 0 ? (
             <div className="text-sm text-secondary-400 py-4 text-center">
-              Noch keine Berechtigungen vergeben. Dieses Element ist nur für den Besitzer sichtbar.
+              {t('shareDialog.nochkeineberechtigungenvergebendiesesele')}
             </div>
           ) : (
             <div className="space-y-2">
@@ -207,7 +208,7 @@ export function ShareDialog({ entityType, entityId, entityName, onClose }: Share
                           value={perm.expires_at ? perm.expires_at.split('T')[0] : ''}
                           onChange={(e) => handleUpdateExpiry(perm, e.target.value || '')}
                           className="text-xs border border-secondary-200 rounded px-1 py-0.5 bg-transparent focus:outline-none focus:ring-1 focus:ring-primary-500 text-secondary-500"
-                          title="Ablaufdatum setzen"
+                          title={t('shareDialog.ablaufdatumsetzen')}
                         />
                       </div>
                     </div>
@@ -229,8 +230,8 @@ export function ShareDialog({ entityType, entityId, entityName, onClose }: Share
                     <button
                       onClick={() => handleDelete(perm)}
                       className="text-secondary-400 hover:text-red-600 p-1.5 rounded-md hover:bg-red-50 flex-shrink-0"
-                      title="Entfernen"
-                      aria-label="Berechtigung entfernen"
+                      title={t('shareDialog.entfernen')}
+                      aria-label={t('shareDialog.berechtigungentfernen')}
                     >
                       <Trash2 className="w-4 h-4" strokeWidth={2} />
                     </button>
@@ -245,7 +246,7 @@ export function ShareDialog({ entityType, entityId, entityName, onClose }: Share
             <div className="mt-4 p-4 border-2 border-primary-200 rounded-lg bg-primary-50/50">
               <div className="flex items-center gap-2 mb-3">
                 <Plus className="w-4 h-4 text-primary-600" strokeWidth={2} />
-                <span className="text-sm font-medium text-secondary-700">Neue Berechtigung</span>
+                <span className="text-sm font-medium text-secondary-700">{t('shareDialog.neueberechtigung')}</span>
               </div>
 
               {/* Type toggle */}
@@ -330,7 +331,7 @@ export function ShareDialog({ entityType, entityId, entityName, onClose }: Share
               <div className="mb-3">
                 <label className="flex items-center gap-2 text-sm text-secondary-600 mb-1">
                   <Calendar className="w-4 h-4" strokeWidth={2} />
-                  Ablaufdatum (optional)
+                  {t('shareDialog.ablaufdatumoptional')}
                 </label>
                 <input
                   type="date"
@@ -364,7 +365,7 @@ export function ShareDialog({ entityType, entityId, entityName, onClose }: Share
               className="mt-4 w-full flex items-center justify-center gap-2 py-2.5 text-sm text-primary-600 border-2 border-dashed border-primary-200 rounded-lg hover:bg-primary-50 hover:border-primary-300 transition-colors"
             >
               <Plus className="w-4 h-4" strokeWidth={2} />
-              Berechtigung hinzufügen
+              {t('shareDialog.berechtigunghinzufügen')}
             </button>
           )}
         </div>
diff --git a/frontend/src/components/contacts/ContactEditForm.tsx b/frontend/src/components/contacts/ContactEditForm.tsx
index b799b02..17fe065 100644
--- a/frontend/src/components/contacts/ContactEditForm.tsx
+++ b/frontend/src/components/contacts/ContactEditForm.tsx
@@ -237,7 +237,7 @@ export function ContactEditForm({ onClose, contact, onSaved }: ContactEditFormPr
           error={errors.name?.message}
           required
           data-testid="contact-name-input"
-          placeholder="TechCorp GmbH"
+          placeholder={t('contactEditForm.techcorpgmbh')}
         />
       ) : (
         <div className="grid grid-cols-2 gap-3">
@@ -257,7 +257,7 @@ export function ContactEditForm({ onClose, contact, onSaved }: ContactEditFormPr
       )}
 
       {/* Code */}
-      <Input label={t('contacts.code')} {...register('code')} placeholder="K-00123" />
+      <Input label={t('contacts.code')} {...register('code')} placeholder={t('contactEditForm.k00123')} />
 
       {/* Communication */}
       <div className="border border-secondary-200 rounded-lg p-3">
@@ -299,7 +299,7 @@ export function ContactEditForm({ onClose, contact, onSaved }: ContactEditFormPr
       <div className="border border-secondary-200 rounded-lg p-3">
         <h3 className="text-sm font-semibold text-secondary-700 mb-2">{t('contacts.notes')}</h3>
         <div className="space-y-3">
-          <Input label={t('contacts.tags')} {...register('tags')} placeholder="tag1, tag2" />
+          <Input label={t('contacts.tags')} {...register('tags')} placeholder={t('contactEditForm.tag1tag2')} />
           <div>
             <label className="block text-sm font-medium text-secondary-700 mb-1">{t('contacts.projectnote')}</label>
             <textarea
diff --git a/frontend/src/components/contacts/ContactFolderTree.tsx b/frontend/src/components/contacts/ContactFolderTree.tsx
index 759c0cf..21013e8 100644
--- a/frontend/src/components/contacts/ContactFolderTree.tsx
+++ b/frontend/src/components/contacts/ContactFolderTree.tsx
@@ -162,6 +162,7 @@ function FolderTreeItem({
   multiSelectedFolders?: string[];
   onToggleMultiSelect?: (folderId: string) => void;
 }) {
+  const { t } = useTranslation();
   const [expanded, setExpanded] = useState(true);
   const folderKey = `folder:${node.id}` as ContactFilter;
   const isActive = selectedFilter === folderKey;
@@ -228,8 +229,8 @@ function FolderTreeItem({
             type="button"
             onClick={(e) => { e.stopPropagation(); e.preventDefault(); onMoreClick(e, node.id); }}
             className="flex-shrink-0 text-secondary-400 hover:text-primary-600 p-1.5 rounded hover:bg-secondary-100 transition-colors touch-manipulation"
-            title="Optionen"
-            aria-label="Optionen"
+            title={t('contactFolderTree.optionen')}
+            aria-label={t('contactFolderTree.optionen')}
           >
             {icon(ICONS.more, 'w-4 h-4')}
           </button>
@@ -446,8 +447,8 @@ export function ContactFolderTree({
           <button
             onClick={handleToggleMultiSelectMode}
             className={`text-secondary-400 hover:text-primary-600 p-0.5 ${multiSelectMode ? 'text-primary-600 bg-primary-50 rounded' : ''}`}
-            title="Mehrere Ordner auswählen"
-            aria-label="Mehrere Ordner auswählen"
+            title={t('contactFolderTree.mehrereordnerauswählen')}
+            aria-label={t('contactFolderTree.mehrereordnerauswählen')}
           >
             <svg className="w-3.5 h-3.5" fill="none" stroke="currentColor" strokeWidth={2} viewBox="0 0 24 24">
               <rect x="3" y="3" width="7" height="7" rx="1" />
@@ -461,8 +462,8 @@ export function ContactFolderTree({
         <button
           onClick={handleNewFolder}
           className="text-secondary-400 hover:text-primary-600 p-0.5"
-          title="Neuer Ordner"
-          aria-label="Neuer Ordner"
+          title={t('contactFolderTree.neuerordner')}
+          aria-label={t('contactFolderTree.neuerordner')}
         >
           {icon(ICONS.plus, 'w-3.5 h-3.5')}
         </button>
@@ -512,7 +513,7 @@ export function ContactFolderTree({
         )}
 
         {tree.length === 0 && !foldersLoading && !loading && (
-          <div className="px-2 py-1 text-xs text-secondary-400">Keine Ordner vorhanden</div>
+          <div className="px-2 py-1 text-xs text-secondary-400">{t('contactFolderTree.keineordnervorhanden')}</div>
         )}
       </div>
 
@@ -574,7 +575,7 @@ export function ContactFolderTree({
         <>
           <div className="fixed inset-0 z-[9998]" onClick={() => setColorPicker(null)} />
           <div className="fixed z-[9999] bg-white border border-secondary-200 rounded-lg shadow-lg p-3 min-w-[200px]" style={{ top: '50%', left: '50%', transform: 'translate(-50%, -50%)' }}>
-            <div className="text-sm font-semibold text-secondary-700 mb-2">Farbe wählen</div>
+            <div className="text-sm font-semibold text-secondary-700 mb-2">{t('contactFolderTree.farbewählen')}</div>
             <div className="grid grid-cols-6 gap-1.5 mb-3">
               {['#ef4444', '#f97316', '#f59e0b', '#eab308', '#84cc16', '#22c55e', '#10b981', '#14b8a6', '#06b6d4', '#3b82f6', '#6366f1', '#8b5cf6', '#a855f7', '#d946ef', '#ec4899', '#f43f5e', '#64748b', '#475569'].map((c) => (
                 <button
diff --git a/frontend/src/components/contacts/ContactList.tsx b/frontend/src/components/contacts/ContactList.tsx
index d3183a1..737e8b9 100644
--- a/frontend/src/components/contacts/ContactList.tsx
+++ b/frontend/src/components/contacts/ContactList.tsx
@@ -969,7 +969,7 @@ export function ContactList({
                   onClick={() => setBulkFolderOpen(!bulkFolderOpen)}
                   className="inline-flex items-center gap-1 px-2 py-1 text-xs font-medium bg-white/20 hover:bg-white/30 rounded transition-colors"
                 >
-                  Ordner zuweisen ▾
+                  {t('contactList.ordnerzuweisen')}
                 </button>
                 {bulkFolderOpen && (
                   <div className="absolute right-0 top-full mt-1 bg-white text-secondary-800 rounded-lg shadow-lg border border-secondary-200 max-h-60 overflow-y-auto min-w-[200px] z-30">
@@ -987,7 +987,7 @@ export function ContactList({
                       </button>
                     ))}
                     {folderList.length === 0 && (
-                      <div className="px-3 py-2 text-xs text-secondary-400">Keine Ordner</div>
+                      <div className="px-3 py-2 text-xs text-secondary-400">{t('contactList.keineordner')}</div>
                     )}
                   </div>
                 )}
@@ -999,7 +999,7 @@ export function ContactList({
                   onClick={() => setBulkTagsOpen(!bulkTagsOpen)}
                   className="inline-flex items-center gap-1 px-2 py-1 text-xs font-medium bg-white/20 hover:bg-white/30 rounded transition-colors"
                 >
-                  Tags hinzufügen ▾
+                  {t('contactList.tagshinzufügen')}
                 </button>
                 {bulkTagsOpen && (
                   <div className="absolute right-0 top-full mt-1 bg-white text-secondary-800 rounded-lg shadow-lg border border-secondary-200 p-2 z-30">
@@ -1007,7 +1007,7 @@ export function ContactList({
                       type="text"
                       value={bulkTagsInput}
                       onChange={(e) => setBulkTagsInput(e.target.value)}
-                      placeholder="tag1, tag2, ..."
+                      placeholder={t('contactList.tag1tag2')}
                       className="w-48 px-2 py-1 text-xs border border-secondary-200 rounded focus:outline-none focus:border-primary-400"
                     />
                     <button
@@ -1032,7 +1032,7 @@ export function ContactList({
               onClick={clearSelection}
               className="inline-flex items-center gap-1 px-2 py-1 text-xs font-medium bg-white/20 hover:bg-white/30 rounded transition-colors"
             >
-              Auswahl aufheben
+              {t('contactList.auswahlaufheben')}
             </button>
           </div>
         )}
@@ -1041,9 +1041,9 @@ export function ContactList({
         {bulkDeleteConfirm && (
           <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/40">
             <div className="bg-white rounded-lg shadow-xl p-6 max-w-sm">
-              <h3 className="text-lg font-semibold text-secondary-900 mb-2">Löschen bestätigen</h3>
+              <h3 className="text-lg font-semibold text-secondary-900 mb-2">{t('contactList.löschenbestätigen')}</h3>
               <p className="text-sm text-secondary-600 mb-4">
-                {selectedContactIds?.size || 0} Kontakt(e) wirklich löschen?
+                {selectedContactIds?.size || 0} {t('contactList.kontaktewirklichlöschen')}
               </p>
               <div className="flex justify-end gap-2">
                 <button
@@ -1073,7 +1073,7 @@ export function ContactList({
         {isCustomSortActive && customOrder.length > 0 && (
           <div className="flex items-center gap-1.5 px-3 py-1 bg-amber-50 border-b border-amber-200 text-xs text-amber-700">
             <Info className="w-3 h-3" />
-            <span>Custom Sortierung aktiv — Drag-and-Drop zum Umsortieren</span>
+            <span>{t('contactList.customsortierungaktivdraganddrop')}</span>
           </div>
         )}
 
@@ -1138,15 +1138,15 @@ export function ContactList({
                   <div ref={colMenuRef} className="relative">
                     <button
                       onClick={() => setColMenuOpen(!colMenuOpen)}
-                      title="Spalten verwalten"
-                      aria-label="Spalten verwalten"
+                      title={t('contactList.spaltenverwalten')}
+                      aria-label={t('contactList.spaltenverwalten')}
                       className="p-1 rounded hover:bg-secondary-100 text-secondary-500 hover:text-secondary-700 transition-colors"
                     >
                       <Settings className="w-3.5 h-3.5" />
                     </button>
                     {colMenuOpen && (
                       <div className="absolute right-0 top-full mt-1 bg-white rounded-lg shadow-lg border border-secondary-200 max-h-80 overflow-y-auto min-w-[200px] z-30">
-                        <div className="px-3 py-2 text-xs font-semibold text-secondary-700 border-b border-secondary-100">Spalten verwalten</div>
+                        <div className="px-3 py-2 text-xs font-semibold text-secondary-700 border-b border-secondary-100">{t('contactList.spaltenverwalten')}</div>
                         {ALL_COLUMNS.map((col) => (
                           <label
                             key={col.key}
diff --git a/frontend/src/components/contacts/FilterPanel.tsx b/frontend/src/components/contacts/FilterPanel.tsx
index abb6b5b..dab0646 100644
--- a/frontend/src/components/contacts/FilterPanel.tsx
+++ b/frontend/src/components/contacts/FilterPanel.tsx
@@ -8,6 +8,7 @@ import React, { useState, useRef, useEffect, useMemo } from 'react';
 import { Filter, Plus, X, ChevronDown, Bookmark } from 'lucide-react';
 import type { UnifiedContact } from '@/api/unifiedContacts';
 import { useCustomFieldDefinitions, type CustomFieldDefinition } from '@/api/customFieldDefinitions';
+import { useTranslation } from 'react-i18next';
 
 // ─── Field definitions ───────────────────────────────────────────────────────
 
@@ -245,6 +246,7 @@ function newConditionId() {
 }
 
 export function FilterPanel({ filters, onFiltersChange, contactType, savedFilters = [], onSaveFilter, onLoadFilter, onDeleteFilter }: FilterPanelProps) {
+  const { t } = useTranslation();
   const [open, setOpen] = useState(false);
   const btnRef = useRef<HTMLDivElement>(null);
   const panelRef = useRef<HTMLDivElement>(null);
@@ -373,8 +375,8 @@ export function FilterPanel({ filters, onFiltersChange, contactType, savedFilter
       <div ref={btnRef} className="relative flex-shrink-0">
         <button
           onClick={handleToggle}
-          title="Filter"
-          aria-label="Filter"
+          title={t('filterPanel.filter')}
+          aria-label={t('filterPanel.filter')}
           className={`
             inline-flex items-center gap-1.5 px-2 py-1 rounded text-xs font-medium
             transition-colors duration-100 cursor-pointer relative
@@ -415,7 +417,7 @@ export function FilterPanel({ filters, onFiltersChange, contactType, savedFilter
                   onClick={clearAll}
                   className="text-xs text-secondary-500 hover:text-red-600 transition-colors"
                 >
-                  Alle löschen
+                  {t('filterPanel.allelöschen')}
                 </button>
               )}
               <button
@@ -430,7 +432,7 @@ export function FilterPanel({ filters, onFiltersChange, contactType, savedFilter
           {/* Logic toggle */}
           {activeCount > 0 && (
             <div className="flex items-center gap-2 px-4 py-2 border-b border-secondary-100">
-              <span className="text-xs text-secondary-500">Bedingungen verknüpfen:</span>
+              <span className="text-xs text-secondary-500">{t('filterPanel.bedingungenverknüpfen')}</span>
               <button
                 onClick={toggleLogic}
                 className={`
@@ -483,7 +485,7 @@ export function FilterPanel({ filters, onFiltersChange, contactType, savedFilter
           {/* Saved filters */}
           {savedFilters.length > 0 && (
             <div className="px-4 py-2 border-b border-secondary-100">
-              <div className="text-[10px] font-semibold uppercase tracking-wide text-secondary-400 mb-1.5">Gespeicherte Filter</div>
+              <div className="text-[10px] font-semibold uppercase tracking-wide text-secondary-400 mb-1.5">{t('filterPanel.gespeichertefilter')}</div>
               <div className="space-y-0.5">
                 {savedFilters.map((sf) => (
                   <div key={sf.id} className="flex items-center gap-1 group">
@@ -510,7 +512,7 @@ export function FilterPanel({ filters, onFiltersChange, contactType, savedFilter
           <div className="px-4 py-3 space-y-2">
             {filters.conditions.length === 0 && (
               <div className="text-center py-6 text-xs text-secondary-400">
-                Keine Filter aktiv. Klicke unten um eine Bedingung hinzuzufügen.
+                {t('filterPanel.keinefilteraktivklickeuntenum')}
               </div>
             )}
             {filters.conditions.map((cond, idx) => {
@@ -570,7 +572,7 @@ export function FilterPanel({ filters, onFiltersChange, contactType, savedFilter
                         onChange={(e) => updateCondition(cond.id, { value: e.target.value })}
                         className="px-2 py-1.5 text-xs border border-secondary-200 rounded bg-white cursor-pointer focus:outline-none focus:border-primary-400"
                       >
-                        <option value="">— wählen —</option>
+                        <option value="">{t('filterPanel.wählen')}</option>
                         {def.options?.map((opt) => (
                           <option key={opt.value} value={opt.value}>{opt.label}</option>
                         ))}
@@ -587,7 +589,7 @@ export function FilterPanel({ filters, onFiltersChange, contactType, savedFilter
                         type="text"
                         value={cond.value}
                         onChange={(e) => updateCondition(cond.id, { value: e.target.value })}
-                        placeholder="Wert…"
+                        placeholder={t('filterPanel.wert')}
                         className="w-24 px-2 py-1.5 text-xs border border-secondary-200 rounded focus:outline-none focus:border-primary-400"
                       />
                     )
@@ -615,7 +617,7 @@ export function FilterPanel({ filters, onFiltersChange, contactType, savedFilter
                 className="inline-flex items-center gap-1 px-2 py-1 text-xs font-medium text-primary-600 hover:bg-primary-50 rounded transition-colors"
               >
                 <Plus className="w-3.5 h-3.5" />
-                Bedingung hinzufügen
+                {t('filterPanel.bedingunghinzufügen')}
               </button>
               {activeCount > 0 && onSaveFilter && (
                 <button
@@ -623,7 +625,7 @@ export function FilterPanel({ filters, onFiltersChange, contactType, savedFilter
                   className="inline-flex items-center gap-1 px-2 py-1 text-xs font-medium text-primary-600 hover:bg-primary-50 rounded transition-colors"
                 >
                   <Bookmark className="w-3.5 h-3.5" />
-                  Filter speichern
+                  {t('filterPanel.filterspeichern')}
                 </button>
               )}
             </div>
diff --git a/frontend/src/components/contacts/FolderPermissionDialog.tsx b/frontend/src/components/contacts/FolderPermissionDialog.tsx
index 70c311d..c6b2a7d 100644
--- a/frontend/src/components/contacts/FolderPermissionDialog.tsx
+++ b/frontend/src/components/contacts/FolderPermissionDialog.tsx
@@ -11,6 +11,7 @@ import {
 import { useUsers } from '@/api/users';
 import { useGroups } from '@/api/groups';
 import type { FolderPermission } from '@/api/contactFolders';
+import { useTranslation } from 'react-i18next';
 
 interface FolderPermissionDialogProps {
   folderId: string;
@@ -36,6 +37,7 @@ function permLabel(level: string) {
 }
 
 export function FolderPermissionDialog({ folderId, folderName, onClose }: FolderPermissionDialogProps) {
+  const { t } = useTranslation();
   const { data: permData, isLoading } = useFolderPermissions(folderId);
   const { data: usersData } = useUsers(1, 100);
   const { data: groupsData } = useGroups();
@@ -109,7 +111,7 @@ export function FolderPermissionDialog({ folderId, folderName, onClose }: Folder
           <button
             onClick={onClose}
             className="text-secondary-400 hover:text-secondary-600 p-1 rounded-md hover:bg-secondary-100"
-            aria-label="Schließen"
+            aria-label={t('folderPermissionDialog.schließen')}
           >
             <X className="w-5 h-5" strokeWidth={2} />
           </button>
@@ -119,9 +121,9 @@ export function FolderPermissionDialog({ folderId, folderName, onClose }: Folder
         <div className="flex-1 overflow-y-auto px-5 py-4">
           {/* Info banner */}
           <div className="mb-4 p-3 bg-primary-50 border border-primary-200 rounded-lg text-sm text-primary-700">
-            <p className="font-medium mb-1">Ordner teilen</p>
+            <p className="font-medium mb-1">{t('folderPermissionDialog.ordnerteilen')}</p>
             <p className="text-primary-600">
-              Gewähre Benutzern oder Gruppen Zugriff auf diesen Ordner. Mit „Vererben" gelten die Rechte auch für alle Unterordner.
+              {t('folderPermissionDialog.gewährebenutzernodergruppenzugriffauf')}
             </p>
           </div>
 
@@ -130,7 +132,7 @@ export function FolderPermissionDialog({ folderId, folderName, onClose }: Folder
             <div className="text-sm text-secondary-400 py-4 text-center">Laden…</div>
           ) : permissions.length === 0 ? (
             <div className="text-sm text-secondary-400 py-4 text-center">
-              Noch keine Berechtigungen vergeben. Dieser Ordner ist nur für den Besitzer sichtbar.
+              {t('folderPermissionDialog.nochkeineberechtigungenvergebendieserord')}
             </div>
           ) : (
             <div className="space-y-2">
@@ -176,8 +178,8 @@ export function FolderPermissionDialog({ folderId, folderName, onClose }: Folder
                     <button
                       onClick={() => handleDelete(perm)}
                       className="text-secondary-400 hover:text-red-600 p-1.5 rounded-md hover:bg-red-50 flex-shrink-0"
-                      title="Entfernen"
-                      aria-label="Berechtigung entfernen"
+                      title={t('folderPermissionDialog.entfernen')}
+                      aria-label={t('folderPermissionDialog.berechtigungentfernen')}
                     >
                       <Trash2 className="w-4 h-4" strokeWidth={2} />
                     </button>
@@ -192,7 +194,7 @@ export function FolderPermissionDialog({ folderId, folderName, onClose }: Folder
             <div className="mt-4 p-4 border-2 border-primary-200 rounded-lg bg-primary-50/50">
               <div className="flex items-center gap-2 mb-3">
                 <Plus className="w-4 h-4 text-primary-600" strokeWidth={2} />
-                <span className="text-sm font-medium text-secondary-700">Neue Berechtigung</span>
+                <span className="text-sm font-medium text-secondary-700">{t('folderPermissionDialog.neueberechtigung')}</span>
               </div>
 
               {/* Type toggle */}
@@ -264,7 +266,7 @@ export function FolderPermissionDialog({ folderId, folderName, onClose }: Folder
                   onChange={(e) => setAddInherit(e.target.checked)}
                   className="w-4 h-4 rounded border-secondary-300 text-primary-600 focus:ring-primary-500"
                 />
-                Auf Unterordner vererben
+                {t('folderPermissionDialog.aufunterordnervererben')}
               </label>
 
               {/* Actions */}
@@ -290,7 +292,7 @@ export function FolderPermissionDialog({ folderId, folderName, onClose }: Folder
               className="mt-4 w-full flex items-center justify-center gap-2 py-2.5 text-sm text-primary-600 border-2 border-dashed border-primary-200 rounded-lg hover:bg-primary-50 hover:border-primary-300 transition-colors"
             >
               <Plus className="w-4 h-4" strokeWidth={2} />
-              Berechtigung hinzufügen
+              {t('folderPermissionDialog.berechtigunghinzufügen')}
             </button>
           )}
         </div>
diff --git a/frontend/src/components/contacts/GroupPanel.tsx b/frontend/src/components/contacts/GroupPanel.tsx
index e81f6a4..f4cb4e6 100644
--- a/frontend/src/components/contacts/GroupPanel.tsx
+++ b/frontend/src/components/contacts/GroupPanel.tsx
@@ -8,6 +8,7 @@ import React, { useState, useRef, useEffect, useMemo } from 'react';
 import { Group as GroupIcon, Plus, X } from 'lucide-react';
 import type { UnifiedContact } from '@/api/unifiedContacts';
 import { useCustomFieldDefinitions } from '@/api/customFieldDefinitions';
+import { useTranslation } from 'react-i18next';
 
 // ─── Field definitions ────────────────────────────────────────────────────────
 
@@ -172,6 +173,7 @@ function newGroupId() {
 }
 
 export function GroupPanel({ groupState, onGroupChange, contactType }: GroupPanelProps) {
+  const { t } = useTranslation();
   const [open, setOpen] = useState(false);
   const btnRef = useRef<HTMLDivElement>(null);
   const panelRef = useRef<HTMLDivElement>(null);
@@ -289,8 +291,8 @@ export function GroupPanel({ groupState, onGroupChange, contactType }: GroupPane
       <div ref={btnRef} className="relative flex-shrink-0">
         <button
           onClick={handleToggle}
-          title="Gruppierung"
-          aria-label="Gruppierung"
+          title={t('groupPanel.gruppierung')}
+          aria-label={t('groupPanel.gruppierung')}
           className={`
             inline-flex items-center gap-1.5 px-2 py-1 rounded text-xs font-medium
             transition-colors duration-100 cursor-pointer relative
@@ -331,7 +333,7 @@ export function GroupPanel({ groupState, onGroupChange, contactType }: GroupPane
                   onClick={clearAll}
                   className="text-xs text-secondary-500 hover:text-red-600 transition-colors"
                 >
-                  Alle löschen
+                  {t('groupPanel.allelöschen')}
                 </button>
               )}
               <button
@@ -347,7 +349,7 @@ export function GroupPanel({ groupState, onGroupChange, contactType }: GroupPane
           {activeCount === 0 && (
             <div className="px-4 py-3 border-b border-secondary-100">
               <div className="text-center py-4 text-xs text-secondary-400">
-                Keine Gruppierung aktiv. Alle Datensätze werden in einer flachen Liste angezeigt.
+                {t('groupPanel.keinegruppierungaktivalledatensätzewerde')}
               </div>
             </div>
           )}
@@ -435,7 +437,7 @@ export function GroupPanel({ groupState, onGroupChange, contactType }: GroupPane
               className="inline-flex items-center gap-1 px-2 py-1 text-xs font-medium text-primary-600 hover:bg-primary-50 rounded transition-colors"
             >
               <Plus className="w-3.5 h-3.5" />
-              Gruppierung hinzufügen
+              {t('groupPanel.gruppierunghinzufügen')}
             </button>
             <button
               onClick={() => setOpen(false)}
diff --git a/frontend/src/components/contacts/SaveViewDialog.tsx b/frontend/src/components/contacts/SaveViewDialog.tsx
index 04a366f..4048521 100644
--- a/frontend/src/components/contacts/SaveViewDialog.tsx
+++ b/frontend/src/components/contacts/SaveViewDialog.tsx
@@ -4,6 +4,7 @@
 
 import React, { useState } from 'react';
 import { Bookmark, Check, Folder, Filter, Group as GroupIcon, ArrowDownAZ, LayoutGrid } from 'lucide-react';
+import { useTranslation } from 'react-i18next';
 
 export interface SaveViewSelection {
   folder: boolean;
@@ -32,6 +33,7 @@ const defaultSelection: SaveViewSelection = {
 };
 
 export function SaveViewDialog({ open, onClose, onSave, hasFilter, hasGroup, hasSort, hasFolder }: SaveViewDialogProps) {
+  const { t } = useTranslation();
   const [name, setName] = useState('');
   const [selection, setSelection] = useState<SaveViewSelection>(defaultSelection);
 
@@ -66,19 +68,19 @@ export function SaveViewDialog({ open, onClose, onSave, hasFilter, hasGroup, has
         {/* Header */}
         <div className="flex items-center gap-2 px-5 py-4 border-b border-secondary-100">
           <Bookmark className="w-5 h-5 text-primary-600" strokeWidth={2} />
-          <h2 className="text-base font-semibold text-secondary-800">Ansicht speichern</h2>
+          <h2 className="text-base font-semibold text-secondary-800">{t('saveViewDialog.ansichtspeichern')}</h2>
         </div>
 
         {/* Body */}
         <div className="px-5 py-4 space-y-4">
           {/* Name input */}
           <div>
-            <label className="block text-xs font-medium text-secondary-600 mb-1">Name der Ansicht</label>
+            <label className="block text-xs font-medium text-secondary-600 mb-1">{t('saveViewDialog.namederansicht')}</label>
             <input
               type="text"
               value={name}
               onChange={(e) => setName(e.target.value)}
-              placeholder="z.B. Meine Firmen-Kontakte"
+              placeholder={t('saveViewDialog.zbmeinefirmenkontakte')}
               autoFocus
               onKeyDown={(e) => { if (e.key === 'Enter') handleSave(); }}
               className="w-full px-3 py-2 text-sm border border-secondary-200 rounded-md focus:outline-none focus:border-primary-400 focus:ring-1 focus:ring-primary-300"
@@ -87,7 +89,7 @@ export function SaveViewDialog({ open, onClose, onSave, hasFilter, hasGroup, has
 
           {/* Component selection */}
           <div>
-            <label className="block text-xs font-medium text-secondary-600 mb-2">Was soll gespeichert werden?</label>
+            <label className="block text-xs font-medium text-secondary-600 mb-2">{t('saveViewDialog.wassollgespeichertwerden')}</label>
             <div className="space-y-1.5">
               {options.map((opt) => (
                 <label
@@ -112,7 +114,7 @@ export function SaveViewDialog({ open, onClose, onSave, hasFilter, hasGroup, has
                     </div>
                   </span>
                   {!opt.available && (
-                    <span className="text-[10px] text-secondary-400 italic">nicht aktiv</span>
+                    <span className="text-[10px] text-secondary-400 italic">{t('saveViewDialog.nichtaktiv')}</span>
                   )}
                 </label>
               ))}
diff --git a/frontend/src/components/contacts/SortPanel.tsx b/frontend/src/components/contacts/SortPanel.tsx
index aee5bda..1db8292 100644
--- a/frontend/src/components/contacts/SortPanel.tsx
+++ b/frontend/src/components/contacts/SortPanel.tsx
@@ -8,6 +8,7 @@ import React, { useState, useRef, useEffect, useMemo } from 'react';
 import { ArrowDownAZ, ArrowUpZA, Plus, X } from 'lucide-react';
 import type { UnifiedContact } from '@/api/unifiedContacts';
 import { useCustomFieldDefinitions } from '@/api/customFieldDefinitions';
+import { useTranslation } from 'react-i18next';
 
 // ─── Field definitions (reuse from FilterPanel) ────────────────────────────────
 
@@ -164,6 +165,7 @@ function newSortId() {
 }
 
 export function SortPanel({ sortState, onSortChange, contactType }: SortPanelProps) {
+  const { t } = useTranslation();
   const [open, setOpen] = useState(false);
   const btnRef = useRef<HTMLDivElement>(null);
   const panelRef = useRef<HTMLDivElement>(null);
@@ -282,8 +284,8 @@ export function SortPanel({ sortState, onSortChange, contactType }: SortPanelPro
       <div ref={btnRef} className="relative flex-shrink-0">
         <button
           onClick={handleToggle}
-          title="Sortieren"
-          aria-label="Sortieren"
+          title={t('sortPanel.sortieren')}
+          aria-label={t('sortPanel.sortieren')}
           className={`
             inline-flex items-center gap-1.5 px-2 py-1 rounded text-xs font-medium
             transition-colors duration-100 cursor-pointer relative
@@ -324,7 +326,7 @@ export function SortPanel({ sortState, onSortChange, contactType }: SortPanelPro
                   onClick={clearAll}
                   className="text-xs text-secondary-500 hover:text-red-600 transition-colors"
                 >
-                  Alle löschen
+                  {t('sortPanel.allelöschen')}
                 </button>
               )}
               <button
@@ -340,7 +342,7 @@ export function SortPanel({ sortState, onSortChange, contactType }: SortPanelPro
           {activeCount === 0 && (
             <div className="px-4 py-3 border-b border-secondary-100">
               <div className="text-center py-4 text-xs text-secondary-400">
-                Keine Sortierung aktiv. Datensätze können per Drag-and-Drop umsortiert werden.
+                {t('sortPanel.keinesortierungaktivdatensätzekönnenper')}
               </div>
             </div>
           )}
@@ -448,7 +450,7 @@ export function SortPanel({ sortState, onSortChange, contactType }: SortPanelPro
               className="inline-flex items-center gap-1 px-2 py-1 text-xs font-medium text-primary-600 hover:bg-primary-50 rounded transition-colors"
             >
               <Plus className="w-3.5 h-3.5" />
-              Sortierung hinzufügen
+              {t('sortPanel.sortierunghinzufügen')}
             </button>
             <button
               onClick={() => setOpen(false)}
diff --git a/frontend/src/components/custom-fields/CustomFieldRenderer.tsx b/frontend/src/components/custom-fields/CustomFieldRenderer.tsx
index d05c5b5..32e9a1a 100644
--- a/frontend/src/components/custom-fields/CustomFieldRenderer.tsx
+++ b/frontend/src/components/custom-fields/CustomFieldRenderer.tsx
@@ -9,6 +9,7 @@ import { Select } from '@/components/ui/Select';
 import { Badge } from '@/components/ui/Badge';
 import { X } from 'lucide-react';
 import type { CustomFieldDefinition } from '@/api/customFieldDefinitions';
+import { useTranslation } from 'react-i18next';
 
 export interface CustomFieldRendererProps {
   definition: CustomFieldDefinition;
@@ -17,6 +18,7 @@ export interface CustomFieldRendererProps {
 }
 
 export function CustomFieldRenderer({ definition, value, onChange }: CustomFieldRendererProps) {
+  const { t } = useTranslation();
   const generatedId = useId();
   const fieldId = `cf-${definition.id || generatedId}`;
   const { field_type, options, required } = definition;
@@ -39,7 +41,7 @@ export function CustomFieldRenderer({ definition, value, onChange }: CustomField
           />
           <span>
             {definition.label}
-            {required && <span className="text-danger-500 ml-1" aria-label="required">*</span>}
+            {required && <span className="text-danger-500 ml-1" aria-label={t('customFieldRenderer.required')}>*</span>}
           </span>
         </label>
       </div>
@@ -73,7 +75,7 @@ export function CustomFieldRenderer({ definition, value, onChange }: CustomField
       <div className="w-full">
         <label className="block text-sm font-medium text-secondary-700 mb-1">
           {definition.label}
-          {required && <span className="text-danger-500 ml-1" aria-label="required">*</span>}
+          {required && <span className="text-danger-500 ml-1" aria-label={t('customFieldRenderer.required')}>*</span>}
         </label>
         {selectedValues.length > 0 && (
           <div className="flex flex-wrap gap-1.5 mb-2">
@@ -106,9 +108,9 @@ export function CustomFieldRenderer({ definition, value, onChange }: CustomField
             ))}
           </div>
         ) : availableOptions.length === 0 ? (
-          <p className="text-sm text-secondary-400">Keine Optionen verfügbar</p>
+          <p className="text-sm text-secondary-400">{t('customFieldRenderer.keineoptionenverfügbar')}</p>
         ) : (
-          <p className="text-sm text-secondary-400">Alle Optionen ausgewählt</p>
+          <p className="text-sm text-secondary-400">{t('customFieldRenderer.alleoptionenausgewählt')}</p>
         )}
       </div>
     );
@@ -123,7 +125,7 @@ export function CustomFieldRenderer({ definition, value, onChange }: CustomField
         label={definition.label}
         required={required}
         options={selectOptions}
-        placeholder="— Bitte wählen —"
+        placeholder={t('customFieldRenderer.bittewählen')}
         value={value ?? ''}
         onChange={(e) => onChange(e.target.value)}
       />
diff --git a/frontend/src/components/layout/AISidebar.tsx b/frontend/src/components/layout/AISidebar.tsx
index 821e7a6..94ab063 100644
--- a/frontend/src/components/layout/AISidebar.tsx
+++ b/frontend/src/components/layout/AISidebar.tsx
@@ -44,10 +44,11 @@ interface TabDef {
 }
 
 function ChatPanel() {
+  const { t } = useTranslation();
   return (
     <div className="flex flex-col h-full" data-testid="chat-panel">
       <div className="flex-1 overflow-y-auto p-3">
-        <p className="text-sm text-secondary-400 text-center py-8">Chat-Sidebar - Coming Soon</p>
+        <p className="text-sm text-secondary-400 text-center py-8">{t('aISidebar.chatsidebarcomingsoon')}</p>
       </div>
     </div>
   );
@@ -103,6 +104,7 @@ export function AISidebar() {
   }
 
   const renderTabContent = () => {
+    const { t } = useTranslation();
     if (aiSidebarTab === 'proactive') {
       return (
         <div className="flex flex-col h-full">
@@ -117,14 +119,14 @@ export function AISidebar() {
       return (
         <div className="flex flex-col h-full overflow-y-auto p-3 gap-2" data-testid="notification-list">
           {notifications.length === 0 && (
-            <p className="text-sm text-secondary-400 text-center py-4">Keine Benachrichtigungen</p>
+            <p className="text-sm text-secondary-400 text-center py-4">{t('aISidebar.keinebenachrichtigungen')}</p>
           )}
           {notifications.map((msg, i) => (
             <div key={i} className="flex items-start justify-between gap-2 px-3 py-2 rounded-lg border border-secondary-200 bg-secondary-50 hover:border-secondary-300 hover:bg-secondary-100 transition-colors text-sm text-secondary-700 group">
               <span className="flex-1 leading-snug">{msg}</span>
               <button
                 className="p-1 rounded text-secondary-300 hover:text-danger-600 hover:bg-danger-50 opacity-0 group-hover:opacity-100 transition-opacity flex-shrink-0 mt-0.5"
-                aria-label="Benachrichtigung löschen"
+                aria-label={t('aISidebar.benachrichtigunglöschen')}
                 onClick={() => removeNotification(i)}
               >
                 <X className="w-3.5 h-3.5" aria-hidden="true" strokeWidth={2} />
@@ -150,13 +152,13 @@ export function AISidebar() {
     return (
       <div className="flex flex-col items-center justify-center h-full text-center px-4 gap-3">
         <p className="text-sm text-secondary-500">
-          Der volle KI-Chat ist auf der AI-Assistant-Seite verfügbar.
+          {t('aISidebar.dervollekichatistauf')}
         </p>
         <Link
           to="/ai-assistant"
           className="inline-flex items-center px-4 py-2 rounded-md bg-primary-600 text-white text-sm font-medium hover:bg-primary-700 focus:outline-none focus-visible:ring-2 focus-visible:ring-primary-500 min-h-touch"
         >
-          AI Assistant öffnen
+          {t('aISidebar.aiassistantöffnen')}
         </Link>
       </div>
     );
@@ -190,8 +192,8 @@ export function AISidebar() {
       <button
         onClick={toggleAISidebar}
         className="p-1.5 rounded-md text-secondary-400 hover:text-secondary-600 hover:bg-secondary-100 min-h-touch min-w-touch flex items-center justify-center"
-        title="Einklappen"
-        aria-label="KI Assistent einklappen"
+        title={t('aISidebar.einklappen')}
+        aria-label={t('aISidebar.kiassistenteinklappen')}
       >
         {chevronRightIcon}
       </button>
@@ -210,7 +212,7 @@ export function AISidebar() {
           <button
             onClick={toggleAISidebar}
             className="inline-flex items-center gap-1 px-2 py-1 rounded text-sm text-secondary-700 hover:bg-secondary-100 min-h-touch"
-            aria-label="Zurück"
+            aria-label={t('aISidebar.zurück')}
             data-testid="ai-sidebar-back"
           >
             <ChevronLeft className="w-5 h-5" aria-hidden="true" strokeWidth={2} />
diff --git a/frontend/src/components/layout/MessageSidebar.tsx b/frontend/src/components/layout/MessageSidebar.tsx
index 074e92e..937f2a1 100644
--- a/frontend/src/components/layout/MessageSidebar.tsx
+++ b/frontend/src/components/layout/MessageSidebar.tsx
@@ -128,6 +128,7 @@ function MessageFeed({
   messages: Message[];
   loading: boolean;
 }) {
+  const { t } = useTranslation();
   const scrollRef = useRef<HTMLDivElement>(null);
 
   useEffect(() => {
@@ -147,7 +148,7 @@ function MessageFeed({
   if (messages.length === 0) {
     return (
       <div className="flex items-center justify-center h-full text-sm text-secondary-400">
-        Keine Nachrichten
+        {t('messageSidebar.keinenachrichten')}
       </div>
     );
   }
@@ -205,6 +206,7 @@ function MessageInput({
   onSend: (text: string) => void;
   disabled: boolean;
 }) {
+  const { t } = useTranslation();
   const [text, setText] = useState('');
 
   const handleSend = () => {
@@ -236,7 +238,7 @@ function MessageInput({
         onClick={handleSend}
         disabled={disabled || !text.trim()}
         className="p-2 rounded-lg bg-primary-500 text-white hover:bg-primary-600 disabled:bg-secondary-200 disabled:text-secondary-400 transition-colors min-h-touch min-w-touch flex items-center justify-center"
-        aria-label="Senden"
+        aria-label={t('messageSidebar.senden')}
         data-testid="message-send-btn"
       >
         {sendIcon}
@@ -386,6 +388,7 @@ export function MessageSidebar() {
 
   // Determine which pinned conv to select when a quick-access button is clicked
   const handleQuickAccess = (qa: QuickAccessDef) => {
+    const { t } = useTranslation();
     setCurrentView(qa.view);
     if (qa.view === 'conversations' && qa.filterPinned) {
       // Find pinned conversation matching the filter by title
@@ -480,8 +483,8 @@ export function MessageSidebar() {
       <button
         onClick={toggleMessageSidebar}
         className="p-1.5 rounded-md text-secondary-400 hover:text-secondary-600 hover:bg-secondary-100 min-h-touch min-w-touch flex items-center justify-center"
-        title="Einklappen"
-        aria-label="Messaging einklappen"
+        title={t('messageSidebar.einklappen')}
+        aria-label={t('messageSidebar.messagingeinklappen')}
       >
         {chevronRightIcon}
       </button>
@@ -498,7 +501,7 @@ export function MessageSidebar() {
         <p className="text-sm text-red-500 text-center py-2">{typeof error === "string" ? error : (error as any)?.message || "Ein Fehler ist aufgetreten"}</p>
       )}
       {!loading && conversations.length === 0 && !error && (
-        <p className="text-sm text-secondary-400 text-center py-4">Keine Konversationen</p>
+        <p className="text-sm text-secondary-400 text-center py-4">{t('messageSidebar.keinekonversationen')}</p>
       )}
       {/* Pinned conversations */}
       {pinnedConversations.length > 0 && (
@@ -537,6 +540,7 @@ export function MessageSidebar() {
 
   // ─── Main Content Area ───
   const renderContent = () => {
+    const { t } = useTranslation();
     if (currentView === 'team') {
       return <TeamPanel onStartDirectChat={handleStartDirectChat} />;
     }
@@ -564,7 +568,7 @@ export function MessageSidebar() {
           )}
           {isSystemLocked && (
             <div className="p-3 border-t border-secondary-200 text-center">
-              <span className="text-xs text-secondary-400">System-Konversation (schreibgeschützt)</span>
+              <span className="text-xs text-secondary-400">{t('messageSidebar.systemkonversationschreibgeschützt')}</span>
             </div>
           )}
         </div>
@@ -584,7 +588,7 @@ export function MessageSidebar() {
           <button
             onClick={toggleMessageSidebar}
             className="inline-flex items-center gap-1 px-2 py-1 rounded text-sm text-secondary-700 hover:bg-secondary-100 min-h-touch"
-            aria-label="Zurück"
+            aria-label={t('messageSidebar.zurück')}
             data-testid="message-sidebar-back"
           >
             <ChevronLeft className="w-5 h-5" aria-hidden="true" strokeWidth={2} />
diff --git a/frontend/src/components/layout/PluginToolbar.tsx b/frontend/src/components/layout/PluginToolbar.tsx
index 99e8dee..fda6e63 100644
--- a/frontend/src/components/layout/PluginToolbar.tsx
+++ b/frontend/src/components/layout/PluginToolbar.tsx
@@ -1,7 +1,9 @@
 import React from 'react';
 import { usePluginToolbarStore, type ToolbarItem } from '@/store/pluginToolbarStore';
+import { useTranslation } from 'react-i18next';
 
 function ToolbarButton({ item }: { item: ToolbarItem }) {
+  const { t } = useTranslation();
   return (
     <button
       onClick={item.onClick}
@@ -21,6 +23,7 @@ function ToolbarButton({ item }: { item: ToolbarItem }) {
 }
 
 function ToolbarSearch({ item }: { item: ToolbarItem }) {
+  const { t } = useTranslation();
   const [expanded, setExpanded] = React.useState(false);
   const [value, setValue] = React.useState('');
   const inputRef = React.useRef<HTMLInputElement>(null);
@@ -74,7 +77,7 @@ function ToolbarSearch({ item }: { item: ToolbarItem }) {
       <button
         onClick={handleToggle}
         className="ml-1 p-1 rounded hover:bg-secondary-100 text-secondary-400 hover:text-secondary-600 transition-colors"
-        aria-label="Suche schließen"
+        aria-label={t('pluginToolbar.sucheschließen')}
       >
         <svg className="w-3.5 h-3.5" fill="none" stroke="currentColor" strokeWidth={2} viewBox="0 0 24 24">
           <line x1="18" y1="6" x2="6" y2="18" />
diff --git a/frontend/src/components/layout/Sidebar.tsx b/frontend/src/components/layout/Sidebar.tsx
index 8fb3bb4..6df4a43 100644
--- a/frontend/src/components/layout/Sidebar.tsx
+++ b/frontend/src/components/layout/Sidebar.tsx
@@ -182,21 +182,21 @@ export function Sidebar() {
           'flex flex-col transition-transform motion-safe:duration-300',
           sidebarOpen ? 'translate-x-0' : '-translate-x-full md:hidden'
         )}
-        aria-label="Seitenleiste Navigation"
+        aria-label={t('sidebar.seitenleistenavigation')}
         data-testid="sidebar"
       >
         <div className="h-[58px] flex items-center gap-2 px-4 border-b border-secondary-700">
           <button
             onClick={() => navigate('/start')}
             className="p-1.5 rounded-md text-secondary-400 hover:bg-secondary-700 hover:text-white flex items-center justify-center focus:outline-none"
-            aria-label="Zurück zur Startseite"
-            title="Zurück zur Startseite"
+            aria-label={t('sidebar.zurückzurstartseite')}
+            title={t('sidebar.zurückzurstartseite')}
           >
             <ArrowLeft className="w-4 h-4" />
           </button>
           <span className="text-xl font-bold text-white">leocrm</span>
         </div>
-        <nav className="flex-1 overflow-y-auto py-4" aria-label="Hauptnavigation">
+        <nav className="flex-1 overflow-y-auto py-4" aria-label={t('sidebar.hauptnavigation')}>
           <ul className="space-y-1 px-2">
             {(() => {
               const groups = new Map<string, typeof allMenuItems>();
diff --git a/frontend/src/components/layout/SortableMenuItem.tsx b/frontend/src/components/layout/SortableMenuItem.tsx
index eb86ff2..30605ea 100644
--- a/frontend/src/components/layout/SortableMenuItem.tsx
+++ b/frontend/src/components/layout/SortableMenuItem.tsx
@@ -27,6 +27,7 @@ import {
   Workflow,
 } from 'lucide-react';
 import clsx from 'clsx';
+import { useTranslation } from 'react-i18next';
 
 // Curated icon map — avoids `import * as LucideIcons` which loads ALL icons
 // and causes OOM in tests (ARCH-063).
@@ -69,6 +70,7 @@ function getIcon(name: string): React.ReactNode {
 }
 
 export function SortableMenuItem({ id, label, icon, isGroup }: SortableMenuItemProps) {
+  const { t } = useTranslation();
   const {
     attributes,
     listeners,
@@ -99,7 +101,7 @@ export function SortableMenuItem({ id, label, icon, isGroup }: SortableMenuItemP
         className="cursor-grab active:cursor-grabbing text-secondary-400 hover:text-secondary-600 focus:outline-none focus-visible:ring-2 focus-visible:ring-primary-500 rounded"
         {...attributes}
         {...listeners}
-        aria-label="Ziehen zum Sortieren"
+        aria-label={t('sortableMenuItem.ziehenzumsortieren')}
         type="button"
       >
         <GripVertical className="w-4 h-4" />
diff --git a/frontend/src/components/layout/TopBar.tsx b/frontend/src/components/layout/TopBar.tsx
index 4d07831..38212a6 100644
--- a/frontend/src/components/layout/TopBar.tsx
+++ b/frontend/src/components/layout/TopBar.tsx
@@ -63,7 +63,7 @@ export function TopBar() {
         <button
           onClick={toggleSidebar}
           className="p-2 rounded-md bg-primary-600 text-white hover:bg-primary-700 min-h-touch min-w-touch flex items-center justify-center focus:outline-none focus-visible:ring-2 focus-visible:ring-primary-500"
-          aria-label="Seitenleiste ein-/ausklappen"
+          aria-label={t('topBar.seitenleisteeinausklappen')}
           aria-expanded={true}
         >
           <Menu className="w-4 h-4" aria-hidden="true" strokeWidth={2} />
diff --git a/frontend/src/components/mail/ComposeModal.tsx b/frontend/src/components/mail/ComposeModal.tsx
index 4a5d1ca..bd06fe3 100644
--- a/frontend/src/components/mail/ComposeModal.tsx
+++ b/frontend/src/components/mail/ComposeModal.tsx
@@ -303,7 +303,7 @@ export function ComposeModal({
             label={t('mail.to')}
             {...register('to')}
             error={errorMsg(errors.to?.message)}
-            placeholder="recipient@example.com"
+            placeholder={t('composeModal.recipientexamplecom')}
             required
             data-testid="compose-to"
           />
@@ -322,13 +322,13 @@ export function ComposeModal({
                   label={t('mail.cc')}
                   {...register('cc')}
                   error={errorMsg(errors.cc?.message)}
-                  placeholder="cc@example.com"
+                  placeholder={t('composeModal.ccexamplecom')}
                 />
                 <Input
                   label={t('mail.bcc')}
                   {...register('bcc')}
                   error={errorMsg(errors.bcc?.message)}
-                  placeholder="bcc@example.com"
+                  placeholder={t('composeModal.bccexamplecom')}
                 />
               </div>
             )}
@@ -376,7 +376,7 @@ export function ComposeModal({
             >
               {t('mail.addAttachment')}
             </Button>
-            <span className="text-xs text-secondary-400">Max 25 MB per file</span>
+            <span className="text-xs text-secondary-400">{t('composeModal.max25mbperfile')}</span>
           </div>
           {attachments.length > 0 && (
             <ul className="mt-2 space-y-1">
diff --git a/frontend/src/components/mail/MailComposeForm.tsx b/frontend/src/components/mail/MailComposeForm.tsx
index aa7fe26..02f9ccb 100644
--- a/frontend/src/components/mail/MailComposeForm.tsx
+++ b/frontend/src/components/mail/MailComposeForm.tsx
@@ -304,7 +304,7 @@ export function MailComposeForm({
           label={t('mail.to')}
           {...register('to')}
           error={errorMsg(errors.to?.message)}
-          placeholder="recipient@example.com"
+          placeholder={t('mailComposeForm.recipientexamplecom')}
           required
           data-testid="compose-to"
         />
@@ -323,13 +323,13 @@ export function MailComposeForm({
                 label={t('mail.cc')}
                 {...register('cc')}
                 error={errorMsg(errors.cc?.message)}
-                placeholder="cc@example.com"
+                placeholder={t('mailComposeForm.ccexamplecom')}
               />
               <Input
                 label={t('mail.bcc')}
                 {...register('bcc')}
                 error={errorMsg(errors.bcc?.message)}
-                placeholder="bcc@example.com"
+                placeholder={t('mailComposeForm.bccexamplecom')}
               />
             </div>
           )}
@@ -377,7 +377,7 @@ export function MailComposeForm({
           >
             {t('mail.addAttachment')}
           </Button>
-          <span className="text-xs text-secondary-400">Max 25 MB per file</span>
+          <span className="text-xs text-secondary-400">{t('mailComposeForm.max25mbperfile')}</span>
         </div>
         {attachments.length > 0 && (
           <ul className="mt-2 space-y-1">
diff --git a/frontend/src/components/mail/MailFilterPanel.tsx b/frontend/src/components/mail/MailFilterPanel.tsx
index c7a9d6a..797d615 100644
--- a/frontend/src/components/mail/MailFilterPanel.tsx
+++ b/frontend/src/components/mail/MailFilterPanel.tsx
@@ -7,6 +7,7 @@
 
 import React, { useState, useRef, useEffect } from 'react';
 import { Filter, Plus, X, Bookmark } from 'lucide-react';
+import { useTranslation } from 'react-i18next';
 
 // ─── Field definitions ───────────────────────────────────────────────────────
 
@@ -183,6 +184,7 @@ function newConditionId() {
 }
 
 export function MailFilterPanel({ filters, onFiltersChange, savedFilters = [], onSaveFilter, onLoadFilter, onDeleteFilter }: MailFilterPanelProps) {
+  const { t } = useTranslation();
   const [open, setOpen] = useState(false);
   const btnRef = useRef<HTMLDivElement>(null);
   const panelRef = useRef<HTMLDivElement>(null);
@@ -272,8 +274,8 @@ export function MailFilterPanel({ filters, onFiltersChange, savedFilters = [], o
       <div ref={btnRef} className="relative flex-shrink-0">
         <button
           onClick={handleToggle}
-          title="Filter"
-          aria-label="Filter"
+          title={t('mailFilterPanel.filter')}
+          aria-label={t('mailFilterPanel.filter')}
           className={`
             inline-flex items-center gap-1.5 px-2 py-1 rounded text-xs font-medium
             transition-colors duration-100 cursor-pointer relative
@@ -311,7 +313,7 @@ export function MailFilterPanel({ filters, onFiltersChange, savedFilters = [], o
             <div className="flex items-center gap-2">
               {activeCount > 0 && (
                 <button onClick={clearAll} className="text-xs text-secondary-500 hover:text-red-600 transition-colors">
-                  Alle löschen
+                  {t('mailFilterPanel.allelöschen')}
                 </button>
               )}
               <button onClick={() => setOpen(false)} className="p-1 rounded hover:bg-secondary-100 text-secondary-400 hover:text-secondary-600">
@@ -323,7 +325,7 @@ export function MailFilterPanel({ filters, onFiltersChange, savedFilters = [], o
           {/* Logic toggle */}
           {activeCount > 0 && (
             <div className="flex items-center gap-2 px-4 py-2 border-b border-secondary-100">
-              <span className="text-xs text-secondary-500">Bedingungen verknüpfen:</span>
+              <span className="text-xs text-secondary-500">{t('mailFilterPanel.bedingungenverknüpfen')}</span>
               <button onClick={toggleLogic} className={`px-2 py-0.5 text-xs font-medium rounded transition-colors ${filters.logic === 'AND' ? 'bg-primary-600 text-white' : 'bg-secondary-100 text-secondary-600 hover:bg-secondary-200'}`}>UND</button>
               <button onClick={toggleLogic} className={`px-2 py-0.5 text-xs font-medium rounded transition-colors ${filters.logic === 'OR' ? 'bg-primary-600 text-white' : 'bg-secondary-100 text-secondary-600 hover:bg-secondary-200'}`}>ODER</button>
             </div>
@@ -348,7 +350,7 @@ export function MailFilterPanel({ filters, onFiltersChange, savedFilters = [], o
           {/* Saved filters */}
           {(savedFilters?.length ?? 0) > 0 && (
             <div className="px-4 py-2 border-b border-secondary-100">
-              <div className="text-[10px] font-semibold uppercase tracking-wide text-secondary-400 mb-1.5">Gespeicherte Filter</div>
+              <div className="text-[10px] font-semibold uppercase tracking-wide text-secondary-400 mb-1.5">{t('mailFilterPanel.gespeichertefilter')}</div>
               <div className="space-y-0.5">
                 {savedFilters.map((sf) => (
                   <div key={sf.id} className="flex items-center gap-1 group">
@@ -369,7 +371,7 @@ export function MailFilterPanel({ filters, onFiltersChange, savedFilters = [], o
           <div className="px-4 py-3 space-y-2">
             {(filters.conditions?.length ?? 0) === 0 && (
               <div className="text-center py-6 text-xs text-secondary-400">
-                Keine Filter aktiv. Klicke unten um eine Bedingung hinzuzufügen.
+                {t('mailFilterPanel.keinefilteraktivklickeuntenum')}
               </div>
             )}
             {filters.conditions.map((cond, idx) => {
@@ -409,13 +411,13 @@ export function MailFilterPanel({ filters, onFiltersChange, savedFilters = [], o
                   {currentOp?.needsValue ? (
                     def?.type === 'select' ? (
                       <select value={cond.value} onChange={(e) => updateCondition(cond.id, { value: e.target.value })} className="px-2 py-1.5 text-xs border border-secondary-200 rounded bg-white cursor-pointer focus:outline-none focus:border-primary-400">
-                        <option value="">— wählen —</option>
+                        <option value="">{t('mailFilterPanel.wählen')}</option>
                         {def.options?.map((opt) => (<option key={opt.value} value={opt.value}>{opt.label}</option>))}
                       </select>
                     ) : def?.type === 'date' ? (
                       <input type="date" value={cond.value} onChange={(e) => updateCondition(cond.id, { value: e.target.value })} className="px-2 py-1.5 text-xs border border-secondary-200 rounded focus:outline-none focus:border-primary-400" />
                     ) : (
-                      <input type="text" value={cond.value} onChange={(e) => updateCondition(cond.id, { value: e.target.value })} placeholder="Wert…" className="w-24 px-2 py-1.5 text-xs border border-secondary-200 rounded focus:outline-none focus:border-primary-400" />
+                      <input type="text" value={cond.value} onChange={(e) => updateCondition(cond.id, { value: e.target.value })} placeholder={t('mailFilterPanel.wert')} className="w-24 px-2 py-1.5 text-xs border border-secondary-200 rounded focus:outline-none focus:border-primary-400" />
                     )
                   ) : (
                     <div className="w-24" />
@@ -434,12 +436,12 @@ export function MailFilterPanel({ filters, onFiltersChange, savedFilters = [], o
             <div className="flex items-center gap-2">
               <button onClick={addCondition} className="inline-flex items-center gap-1 px-2 py-1 text-xs font-medium text-primary-600 hover:bg-primary-50 rounded transition-colors">
                 <Plus className="w-3.5 h-3.5" />
-                Bedingung hinzufügen
+                {t('mailFilterPanel.bedingunghinzufügen')}
               </button>
               {activeCount > 0 && onSaveFilter && (
                 <button onClick={handleSaveFilter} className="inline-flex items-center gap-1 px-2 py-1 text-xs font-medium text-primary-600 hover:bg-primary-50 rounded transition-colors">
                   <Bookmark className="w-3.5 h-3.5" />
-                  Filter speichern
+                  {t('mailFilterPanel.filterspeichern')}
                 </button>
               )}
             </div>
diff --git a/frontend/src/components/mail/MailFolderTree.tsx b/frontend/src/components/mail/MailFolderTree.tsx
index de804f4..80b89f7 100644
--- a/frontend/src/components/mail/MailFolderTree.tsx
+++ b/frontend/src/components/mail/MailFolderTree.tsx
@@ -116,6 +116,7 @@ function ContextMenu({
   onClose: () => void;
   onEmptyFolder: (folderId: string, folderName: string) => void;
 }) {
+  const { t } = useTranslation();
   const ref = useRef<HTMLDivElement>(null);
 
   useEffect(() => {
@@ -136,7 +137,7 @@ function ContextMenu({
         onClick={() => { onEmptyFolder(state.folderId, state.folderName); onClose(); }}
         className="w-full text-left px-3 py-1.5 text-sm text-red-600 hover:bg-red-50"
       >
-        Ordner leeren
+        {t('mailFolderTree.ordnerleeren')}
       </button>
     </div>
   );
diff --git a/frontend/src/components/mail/MailGroupPanel.tsx b/frontend/src/components/mail/MailGroupPanel.tsx
index 9ec2a28..43ce1ea 100644
--- a/frontend/src/components/mail/MailGroupPanel.tsx
+++ b/frontend/src/components/mail/MailGroupPanel.tsx
@@ -7,6 +7,7 @@
 
 import React, { useState, useRef, useEffect } from 'react';
 import { Group as GroupIcon, Plus, X } from 'lucide-react';
+import { useTranslation } from 'react-i18next';
 
 type FieldType = 'text' | 'number' | 'date';
 
@@ -114,6 +115,7 @@ interface MailGroupPanelProps {
 }
 
 export function MailGroupPanel({ groupState, onGroupChange }: MailGroupPanelProps) {
+  const { t } = useTranslation();
   const [open, setOpen] = useState(false);
   const btnRef = useRef<HTMLDivElement>(null);
   const panelRef = useRef<HTMLDivElement>(null);
@@ -168,8 +170,8 @@ export function MailGroupPanel({ groupState, onGroupChange }: MailGroupPanelProp
       <div ref={btnRef} className="relative flex-shrink-0">
         <button
           onClick={handleToggle}
-          title="Gruppierung"
-          aria-label="Gruppierung"
+          title={t('mailGroupPanel.gruppierung')}
+          aria-label={t('mailGroupPanel.gruppierung')}
           className={`inline-flex items-center gap-1.5 px-2 py-1 rounded text-xs font-medium transition-colors duration-100 cursor-pointer relative ${open || activeCount > 0 ? 'bg-primary-100 text-primary-700' : 'text-secondary-600 hover:bg-secondary-100 hover:text-secondary-900'}`}
         >
           <GroupIcon className="w-3.5 h-3.5" strokeWidth={2} />
@@ -184,12 +186,12 @@ export function MailGroupPanel({ groupState, onGroupChange }: MailGroupPanelProp
           <div className="flex items-center justify-between px-4 py-3 border-b border-secondary-100">
             <span className="text-sm font-semibold text-secondary-800">Gruppierung</span>
             <div className="flex items-center gap-2">
-              {activeCount > 0 && <button onClick={clearAll} className="text-xs text-secondary-500 hover:text-red-600 transition-colors">Alle löschen</button>}
+              {activeCount > 0 && <button onClick={clearAll} className="text-xs text-secondary-500 hover:text-red-600 transition-colors">{t('mailGroupPanel.allelöschen')}</button>}
               <button onClick={() => setOpen(false)} className="p-1 rounded hover:bg-secondary-100 text-secondary-400 hover:text-secondary-600"><X className="w-3.5 h-3.5" /></button>
             </div>
           </div>
           <div className="px-4 py-3 space-y-2">
-            {groupState.conditions.length === 0 && <div className="text-center py-6 text-xs text-secondary-400">Keine Gruppierung aktiv. Klicke unten um ein Feld hinzuzufügen.</div>}
+            {groupState.conditions.length === 0 && <div className="text-center py-6 text-xs text-secondary-400">{t('mailGroupPanel.keinegruppierungaktivklickeuntenum')}</div>}
             {groupState.conditions.map((cond, idx) => (
               <div key={cond.id} className="flex items-center gap-1.5">
                 <span className="text-[10px] font-bold text-secondary-400 w-6 text-center">{idx + 1}.</span>
@@ -203,7 +205,7 @@ export function MailGroupPanel({ groupState, onGroupChange }: MailGroupPanelProp
             ))}
           </div>
           <div className="flex items-center justify-between px-4 py-3 border-t border-secondary-100">
-            <button onClick={addCondition} className="inline-flex items-center gap-1 px-2 py-1 text-xs font-medium text-primary-600 hover:bg-primary-50 rounded transition-colors"><Plus className="w-3.5 h-3.5" />Feld hinzufügen</button>
+            <button onClick={addCondition} className="inline-flex items-center gap-1 px-2 py-1 text-xs font-medium text-primary-600 hover:bg-primary-50 rounded transition-colors"><Plus className="w-3.5 h-3.5" />{t('mailGroupPanel.feldhinzufügen')}</button>
             <button onClick={() => setOpen(false)} className="px-3 py-1 text-xs font-medium text-white bg-primary-600 hover:bg-primary-700 rounded transition-colors">Fertig</button>
           </div>
         </div>
diff --git a/frontend/src/components/mail/MailSortPanel.tsx b/frontend/src/components/mail/MailSortPanel.tsx
index 0ff7cde..170e70e 100644
--- a/frontend/src/components/mail/MailSortPanel.tsx
+++ b/frontend/src/components/mail/MailSortPanel.tsx
@@ -7,6 +7,7 @@
 
 import React, { useState, useRef, useEffect } from 'react';
 import { ArrowUpDown, Plus, X, ChevronUp, ChevronDown } from 'lucide-react';
+import { useTranslation } from 'react-i18next';
 
 type FieldType = 'text' | 'number' | 'date';
 
@@ -86,6 +87,7 @@ interface MailSortPanelProps {
 }
 
 export function MailSortPanel({ sortState, onSortChange }: MailSortPanelProps) {
+  const { t } = useTranslation();
   const [open, setOpen] = useState(false);
   const btnRef = useRef<HTMLDivElement>(null);
   const panelRef = useRef<HTMLDivElement>(null);
@@ -144,8 +146,8 @@ export function MailSortPanel({ sortState, onSortChange }: MailSortPanelProps) {
       <div ref={btnRef} className="relative flex-shrink-0">
         <button
           onClick={handleToggle}
-          title="Sortieren"
-          aria-label="Sortieren"
+          title={t('mailSortPanel.sortieren')}
+          aria-label={t('mailSortPanel.sortieren')}
           className={`inline-flex items-center gap-1.5 px-2 py-1 rounded text-xs font-medium transition-colors duration-100 cursor-pointer relative ${open || activeCount > 0 ? 'bg-primary-100 text-primary-700' : 'text-secondary-600 hover:bg-secondary-100 hover:text-secondary-900'}`}
         >
           <ArrowUpDown className="w-3.5 h-3.5" strokeWidth={2} />
@@ -160,12 +162,12 @@ export function MailSortPanel({ sortState, onSortChange }: MailSortPanelProps) {
           <div className="flex items-center justify-between px-4 py-3 border-b border-secondary-100">
             <span className="text-sm font-semibold text-secondary-800">Sortieren</span>
             <div className="flex items-center gap-2">
-              {activeCount > 0 && <button onClick={clearAll} className="text-xs text-secondary-500 hover:text-red-600 transition-colors">Alle löschen</button>}
+              {activeCount > 0 && <button onClick={clearAll} className="text-xs text-secondary-500 hover:text-red-600 transition-colors">{t('mailSortPanel.allelöschen')}</button>}
               <button onClick={() => setOpen(false)} className="p-1 rounded hover:bg-secondary-100 text-secondary-400 hover:text-secondary-600"><X className="w-3.5 h-3.5" /></button>
             </div>
           </div>
           <div className="px-4 py-3 space-y-2">
-            {sortState.conditions.length === 0 && <div className="text-center py-6 text-xs text-secondary-400">Keine Sortierung aktiv. Klicke unten um ein Feld hinzuzufügen.</div>}
+            {sortState.conditions.length === 0 && <div className="text-center py-6 text-xs text-secondary-400">{t('mailSortPanel.keinesortierungaktivklickeuntenum')}</div>}
             {sortState.conditions.map((cond, idx) => (
               <div key={cond.id} className="flex items-center gap-1.5">
                 <span className="text-[10px] font-bold text-secondary-400 w-6 text-center">{idx + 1}.</span>
@@ -182,7 +184,7 @@ export function MailSortPanel({ sortState, onSortChange }: MailSortPanelProps) {
             ))}
           </div>
           <div className="flex items-center justify-between px-4 py-3 border-t border-secondary-100">
-            <button onClick={addCondition} className="inline-flex items-center gap-1 px-2 py-1 text-xs font-medium text-primary-600 hover:bg-primary-50 rounded transition-colors"><Plus className="w-3.5 h-3.5" />Feld hinzufügen</button>
+            <button onClick={addCondition} className="inline-flex items-center gap-1 px-2 py-1 text-xs font-medium text-primary-600 hover:bg-primary-50 rounded transition-colors"><Plus className="w-3.5 h-3.5" />{t('mailSortPanel.feldhinzufügen')}</button>
             <button onClick={() => setOpen(false)} className="px-3 py-1 text-xs font-medium text-white bg-primary-600 hover:bg-primary-700 rounded transition-colors">Fertig</button>
           </div>
         </div>
diff --git a/frontend/src/components/mail/PgpSettings.tsx b/frontend/src/components/mail/PgpSettings.tsx
index 97347f2..42ed58e 100644
--- a/frontend/src/components/mail/PgpSettings.tsx
+++ b/frontend/src/components/mail/PgpSettings.tsx
@@ -108,7 +108,7 @@ export function PgpSettings() {
               value={privateKey}
               onChange={(e) => setPrivateKey(e.target.value)}
               className="w-full min-h-32 border border-secondary-300 rounded-md p-3 text-sm font-mono focus:outline-none focus:ring-2 focus:ring-primary-500"
-              placeholder="-----BEGIN PGP PRIVATE KEY BLOCK-----"
+              placeholder={t('pgpSettings.beginpgpprivatekeyblock')}
               data-testid="pgp-private-key"
             />
           </div>
@@ -135,7 +135,7 @@ export function PgpSettings() {
                 <div className="flex items-center justify-between">
                   <div>
                     <p className="text-sm font-medium text-secondary-900">{key.user_id}</p>
-                    <p className="text-xs text-secondary-500">Key ID: {key.key_id}</p>
+                    <p className="text-xs text-secondary-500">{t('pgpSettings.keyid')} {key.key_id}</p>
                     <p className="text-xs text-secondary-400">Fingerprint: {key.fingerprint}</p>
                   </div>
                   <span className="text-xs text-secondary-400">{key.is_private ? t('mail.privateKeyLabel') : t('mail.publicKey')}</span>
@@ -152,7 +152,7 @@ export function PgpSettings() {
             label={t('mail.contactId')}
             value={contactId}
             onChange={(e) => setContactId(e.target.value)}
-            placeholder="contact-uuid"
+            placeholder={t('pgpSettings.contactuuid')}
           />
           <div>
             <label className="block text-sm font-medium text-secondary-700 mb-1">{t('mail.publicKey')}</label>
@@ -160,7 +160,7 @@ export function PgpSettings() {
               value={contactPublicKey}
               onChange={(e) => setContactPublicKey(e.target.value)}
               className="w-full min-h-24 border border-secondary-300 rounded-md p-3 text-sm font-mono focus:outline-none focus:ring-2 focus:ring-primary-500"
-              placeholder="-----BEGIN PGP PUBLIC KEY BLOCK-----"
+              placeholder={t('pgpSettings.beginpgppublickeyblock')}
               data-testid="contact-public-key"
             />
           </div>
@@ -175,7 +175,7 @@ export function PgpSettings() {
             {contactKeys.map((ck) => (
               <li key={ck.contact_id} className="p-3 rounded-md border border-secondary-200">
                 <p className="text-sm font-medium text-secondary-900">{ck.contact_name}</p>
-                <p className="text-xs text-secondary-500">Key ID: {ck.key_id}</p>
+                <p className="text-xs text-secondary-500">{t('pgpSettings.keyid')} {ck.key_id}</p>
                 <p className="text-xs text-secondary-400">Fingerprint: {ck.fingerprint}</p>
               </li>
             ))}
diff --git a/frontend/src/components/mail/RichTextEditor.tsx b/frontend/src/components/mail/RichTextEditor.tsx
index f62798e..b2e28d4 100644
--- a/frontend/src/components/mail/RichTextEditor.tsx
+++ b/frontend/src/components/mail/RichTextEditor.tsx
@@ -195,13 +195,13 @@ export function RichTextEditor({ content, onChange, placeholder, editable = true
         <div className="w-px h-6 bg-secondary-200 mx-1" />
 
         {/* Color */}
-        <label className="p-1.5 rounded hover:bg-secondary-100 cursor-pointer" title="Text color">
+        <label className="p-1.5 rounded hover:bg-secondary-100 cursor-pointer" title={t('richTextEditor.textcolor')}>
           <Heading className="w-4 h-4" strokeWidth={2} />
           <input
             type="color"
             className="sr-only"
             onChange={(e) => editor.chain().focus().setColor(e.target.value).run()}
-            title="Text color"
+            title={t('richTextEditor.textcolor')}
           />
         </label>
 
diff --git a/frontend/src/components/mail/SignatureManager.tsx b/frontend/src/components/mail/SignatureManager.tsx
index 9a985c5..0b27ee1 100644
--- a/frontend/src/components/mail/SignatureManager.tsx
+++ b/frontend/src/components/mail/SignatureManager.tsx
@@ -175,7 +175,7 @@ export function SignatureManager() {
               <RichTextEditor
                 content={bodyHtmlValue}
                 onChange={(html: string) => setSigValue('body_html', html)}
-                placeholder="<p>Mit freundlichen Grüßen,<br>{{user.name}}</p>"
+                placeholder={t('signatureManager.pmitfreundlichengrüßenbruser')}
               />
             </div>
             <label className="flex items-center gap-2 text-sm text-secondary-700">
diff --git a/frontend/src/components/notifications/NotificationItem.tsx b/frontend/src/components/notifications/NotificationItem.tsx
index 7f3855f..332086c 100644
--- a/frontend/src/components/notifications/NotificationItem.tsx
+++ b/frontend/src/components/notifications/NotificationItem.tsx
@@ -20,6 +20,7 @@ import {
   type LucideIcon,
 } from 'lucide-react';
 import type { NotificationItem as NotificationItemType } from '@/api/notifications';
+import { useTranslation } from 'react-i18next';
 
 // ── helpers ──
 
@@ -78,6 +79,7 @@ export interface NotificationItemProps {
 }
 
 export function NotificationItem({ notification, onMarkRead }: NotificationItemProps) {
+  const { t } = useTranslation();
   const isUnread = notification.read_at == null;
   const Icon = getIconForType(notification.type);
 
@@ -123,8 +125,8 @@ export function NotificationItem({ notification, onMarkRead }: NotificationItemP
           {isUnread && (
             <span
               className="flex-shrink-0 w-2 h-2 rounded-full bg-primary-500"
-              aria-label="ungelesen"
-              title="ungelesen"
+              aria-label={t('notificationItem.ungelesen')}
+              title={t('notificationItem.ungelesen')}
             />
           )}
         </div>
diff --git a/frontend/src/components/plugins/PluginRouteRenderer.tsx b/frontend/src/components/plugins/PluginRouteRenderer.tsx
index 72b5be9..72992d7 100644
--- a/frontend/src/components/plugins/PluginRouteRenderer.tsx
+++ b/frontend/src/components/plugins/PluginRouteRenderer.tsx
@@ -4,6 +4,7 @@ import { Loader2 } from 'lucide-react';
 import { usePluginStore } from '@/store/pluginStore';
 import { ProtectedRoute } from '@/components/common/ProtectedRoute';
 import { PluginPage } from './PluginLoader';
+import { useTranslation } from 'react-i18next';
 
 /**
  * PluginRouteRenderer — catch-all route handler that checks the current URL
@@ -17,6 +18,7 @@ import { PluginPage } from './PluginLoader';
  *   { path: '*', element: <PluginRouteRenderer /> }
  */
 export function PluginRouteRenderer() {
+  const { t } = useTranslation();
   const location = useLocation();
   const manifests = usePluginStore((s) => s.manifests);
   const loaded = usePluginStore((s) => s.loaded);
@@ -63,7 +65,7 @@ export function PluginRouteRenderer() {
   // If manifests haven't loaded yet, show a spinner (not null/blank)
   if (!loaded) {
     return (
-      <div className="flex items-center justify-center min-h-[50vh]" role="status" aria-label="Loading">
+      <div className="flex items-center justify-center min-h-[50vh]" role="status" aria-label={t('pluginRouteRenderer.loading')}>
         <Loader2 className="animate-spin h-8 w-8 text-primary-500" aria-hidden="true" />
       </div>
     );
@@ -72,9 +74,9 @@ export function PluginRouteRenderer() {
   // No plugin route matched — show a simple not-found
   return (
     <div className="flex flex-col items-center justify-center min-h-[50vh] text-secondary-500">
-      <h2 className="text-2xl font-semibold mb-2">Page Not Found</h2>
+      <h2 className="text-2xl font-semibold mb-2">{t('pluginRouteRenderer.pagenotfound')}</h2>
       <p className="text-sm">
-        The page <code className="bg-secondary-100 px-1 rounded">{location.pathname}</code> was not found.
+        {t('pluginRouteRenderer.thepage')} <code className="bg-secondary-100 px-1 rounded">{location.pathname}</code> {t('pluginRouteRenderer.wasnotfound')}
       </p>
     </div>
   );
diff --git a/frontend/src/components/settings/WorkspaceManager.tsx b/frontend/src/components/settings/WorkspaceManager.tsx
index 6447eef..70f7ef7 100644
--- a/frontend/src/components/settings/WorkspaceManager.tsx
+++ b/frontend/src/components/settings/WorkspaceManager.tsx
@@ -111,21 +111,21 @@ export function WorkspaceManager() {
           <h3 className="font-medium">{t('workspaces.createNew', 'Neuen Workspace erstellen')}</h3>
           <input
             type="text"
-            placeholder="Name"
+            placeholder={t('workspaceManager.name')}
             value={editName}
             onChange={e => setEditName(e.target.value)}
             className="w-full px-3 py-2 border border-gray-300 dark:border-gray-600 rounded-md bg-white dark:bg-gray-900 text-sm"
           />
           <input
             type="text"
-            placeholder="Beschreibung"
+            placeholder={t('workspaceManager.beschreibung')}
             value={editDesc}
             onChange={e => setEditDesc(e.target.value)}
             className="w-full px-3 py-2 border border-gray-300 dark:border-gray-600 rounded-md bg-white dark:bg-gray-900 text-sm"
           />
           <label className="flex items-center gap-2 text-sm">
             <input type="checkbox" checked={editDefault} onChange={e => setEditDefault(e.target.checked)} />
-            Als Standard-Workspace
+            {t('workspaceManager.alsstandardworkspace')}
           </label>
           <div className="flex gap-2">
             <button onClick={handleCreate} disabled={!editName} className="px-3 py-1.5 bg-blue-600 text-white rounded-md hover:bg-blue-700 text-sm font-medium disabled:opacity-50">
@@ -169,7 +169,7 @@ export function WorkspaceManager() {
                       <button
                         onClick={(e) => { e.preventDefault(); setModuleConfig(prev => prev.map(x => x.module_key === m.module_key ? { ...x, config: x.config } : x)); setConfigEditingKey(configEditingKey === m.module_key ? null : m.module_key); }}
                         className="text-xs px-1.5 py-0.5 border rounded hover:bg-gray-100 dark:hover:bg-gray-700"
-                        title="Konfiguration bearbeiten"
+                        title={t('workspaceManager.konfigurationbearbeiten')}
                       >
                         ⚙
                       </button>
@@ -179,7 +179,7 @@ export function WorkspaceManager() {
                     <div className="mt-2 space-y-1">
                       <textarea
                         className="w-full text-xs font-mono p-1.5 border border-gray-300 dark:border-gray-600 rounded bg-white dark:bg-gray-900 h-20"
-                        placeholder='{"visible_folder_ids": []}'
+                        placeholder={t('workspaceManager.visiblefolderids')}
                         value={JSON.stringify(m.config || {}, null, 2)}
                         onChange={(e) => {
                           try {
@@ -190,7 +190,7 @@ export function WorkspaceManager() {
                           }
                         }}
                       />
-                      <p className="text-xs text-gray-400">JSON-Konfiguration für dieses Modul (z.B. sichtbare Ordner-IDs)</p>
+                      <p className="text-xs text-gray-400">{t('workspaceManager.jsonkonfigurationfürdiesesmodulz')}</p>
                     </div>
                   )}
                 </div>
@@ -211,7 +211,7 @@ export function WorkspaceManager() {
             {editingId === ws.id ? (
               <div className="space-y-2">
                 <input type="text" value={editName} onChange={e => setEditName(e.target.value)} className="w-full px-3 py-2 border rounded-md text-sm" />
-                <input type="text" value={editDesc} onChange={e => setEditDesc(e.target.value)} className="w-full px-3 py-2 border rounded-md text-sm" placeholder="Beschreibung" />
+                <input type="text" value={editDesc} onChange={e => setEditDesc(e.target.value)} className="w-full px-3 py-2 border rounded-md text-sm" placeholder={t('workspaceManager.beschreibung')} />
                 <label className="flex items-center gap-2 text-sm">
                   <input type="checkbox" checked={editDefault} onChange={e => setEditDefault(e.target.checked)} />
                   Standard
@@ -246,21 +246,21 @@ export function WorkspaceManager() {
                   <button
                     onClick={() => openModuleEditor(ws)}
                     className="p-1.5 hover:bg-gray-100 dark:hover:bg-gray-800 rounded-md text-sm"
-                    title="Module"
+                    title={t('workspaceManager.module')}
                   >
                     <LayoutGrid className="w-4 h-4" />
                   </button>
                   <button
                     onClick={() => { setEditingId(ws.id); setEditName(ws.name); setEditDesc(ws.description || ''); setEditDefault(ws.is_default); }}
                     className="p-1.5 hover:bg-gray-100 dark:hover:bg-gray-800 rounded-md text-sm"
-                    title="Bearbeiten"
+                    title={t('workspaceManager.bearbeiten')}
                   >
                     <Edit className="w-4 h-4" />
                   </button>
                   <button
                     onClick={() => handleDelete(ws.id)}
                     className="p-1.5 hover:bg-red-50 dark:hover:bg-red-900/20 rounded-md text-sm text-red-600"
-                    title="Löschen"
+                    title={t('workspaceManager.löschen')}
                   >
                     <Trash2 className="w-4 h-4" />
                   </button>
diff --git a/frontend/src/components/shared/ActivityFeed.tsx b/frontend/src/components/shared/ActivityFeed.tsx
index 0c5bdce..bbf3a90 100644
--- a/frontend/src/components/shared/ActivityFeed.tsx
+++ b/frontend/src/components/shared/ActivityFeed.tsx
@@ -1,6 +1,7 @@
 import React from 'react';
 import { Card } from '@/components/ui/Card';
 import { Avatar } from '@/components/ui/Avatar';
+import { useTranslation } from 'react-i18next';
 
 export interface ActivityItem {
   id: string;
@@ -17,11 +18,12 @@ export interface ActivityFeedProps {
 }
 
 export function ActivityFeed({ activities, title = 'Letzte Aktivitäten', maxItems = 10 }: ActivityFeedProps) {
+  const { t } = useTranslation();
   const visible = activities.slice(0, maxItems);
   return (
     <Card title={title} data-testid="activity-feed">
       {visible.length === 0 ? (
-        <p className="text-sm text-secondary-500 py-4 text-center">Keine Aktivitäten vorhanden.</p>
+        <p className="text-sm text-secondary-500 py-4 text-center">{t('activityFeed.keineaktivitätenvorhanden')}</p>
       ) : (
         <ul className="space-y-3" role="list">
           {visible.map((activity) => (
diff --git a/frontend/src/components/shared/DataGrid.tsx b/frontend/src/components/shared/DataGrid.tsx
index 1b1afdc..077c0c4 100644
--- a/frontend/src/components/shared/DataGrid.tsx
+++ b/frontend/src/components/shared/DataGrid.tsx
@@ -112,7 +112,7 @@ export function DataGrid<T extends Record<string, any>>({
         ref={scrollRef}
         className="overflow-x-auto"
         role="region"
-        aria-label="Data grid"
+        aria-label={t('dataGrid.datagrid')}
         style={shouldVirtualize ? { maxHeight: '70vh', overflowY: 'auto' } : undefined}
       >
         <table className="min-w-full divide-y divide-secondary-200">
diff --git a/frontend/src/components/shared/SearchDropdown.tsx b/frontend/src/components/shared/SearchDropdown.tsx
index d6ec8b3..532aad0 100644
--- a/frontend/src/components/shared/SearchDropdown.tsx
+++ b/frontend/src/components/shared/SearchDropdown.tsx
@@ -143,7 +143,7 @@ export function SearchDropdown({ placeholder }: SearchDropdownProps) {
                   onClick={handleSeeAll}
                   className="text-sm text-primary-600 hover:text-primary-700 font-medium min-h-touch"
                 >
-                  Alle Ergebnisse anzeigen →
+                  {t('searchDropdown.alleergebnisseanzeigen')}
                 </button>
               </div>
             </>
diff --git a/frontend/src/components/shared/TeamPanel.tsx b/frontend/src/components/shared/TeamPanel.tsx
index 02b58f8..b94ebf2 100644
--- a/frontend/src/components/shared/TeamPanel.tsx
+++ b/frontend/src/components/shared/TeamPanel.tsx
@@ -10,12 +10,14 @@ import React from 'react';
 import { Users } from 'lucide-react';
 import { useUsers, useGroups } from '@/api/hooks';
 import { Avatar } from '@/components/ui/Avatar';
+import { useTranslation } from 'react-i18next';
 
 interface SharedTeamPanelProps {
   onStartDirectChat?: (userId: string, userName: string) => void;
 }
 
 export function SharedTeamPanel({ onStartDirectChat }: SharedTeamPanelProps) {
+  const { t } = useTranslation();
   const { data: usersData, isLoading: usersLoading } = useUsers();
   const { data: groupsData, isLoading: groupsLoading } = useGroups();
   const users: any[] = usersData?.items || [];
@@ -28,7 +30,7 @@ export function SharedTeamPanel({ onStartDirectChat }: SharedTeamPanelProps) {
         {usersLoading ? (
           <p className="text-sm text-secondary-400">Laden...</p>
         ) : users.length === 0 ? (
-          <p className="text-sm text-secondary-400">Keine Mitarbeiter</p>
+          <p className="text-sm text-secondary-400">{t('teamPanel.keinemitarbeiter')}</p>
         ) : (
           <div className="space-y-1">
             {users.map((u) =>
@@ -40,7 +42,7 @@ export function SharedTeamPanel({ onStartDirectChat }: SharedTeamPanelProps) {
                 >
                   <div className="relative flex-shrink-0">
                     <Avatar name={u.name} size="sm" />
-                    <span className="absolute bottom-0 right-0 w-2.5 h-2.5 rounded-full border-2 border-white bg-secondary-300" aria-label="offline" />
+                    <span className="absolute bottom-0 right-0 w-2.5 h-2.5 rounded-full border-2 border-white bg-secondary-300" aria-label={t('teamPanel.offline')} />
                   </div>
                   <div className="flex-1 min-w-0">
                     <p className="text-sm font-medium text-secondary-700 truncate">{u.name}</p>
@@ -52,7 +54,7 @@ export function SharedTeamPanel({ onStartDirectChat }: SharedTeamPanelProps) {
                 <div key={u.id} className="flex items-center gap-2 px-2 py-1.5 rounded-lg hover:bg-secondary-50 transition-colors">
                   <div className="relative flex-shrink-0">
                     <Avatar name={u.name} size="sm" />
-                    <span className="absolute bottom-0 right-0 w-2.5 h-2.5 rounded-full border-2 border-white bg-secondary-300" aria-label="offline" />
+                    <span className="absolute bottom-0 right-0 w-2.5 h-2.5 rounded-full border-2 border-white bg-secondary-300" aria-label={t('teamPanel.offline')} />
                   </div>
                   <div className="flex-1 min-w-0">
                     <p className="text-sm font-medium text-secondary-700 truncate">{u.name}</p>
@@ -70,7 +72,7 @@ export function SharedTeamPanel({ onStartDirectChat }: SharedTeamPanelProps) {
         {groupsLoading ? (
           <p className="text-sm text-secondary-400">Laden...</p>
         ) : groups.length === 0 ? (
-          <p className="text-sm text-secondary-400">Keine Gruppen</p>
+          <p className="text-sm text-secondary-400">{t('teamPanel.keinegruppen')}</p>
         ) : (
           <div className="space-y-1">
             {groups.map((g) => (
diff --git a/frontend/src/components/tasks/TaskDetail.tsx b/frontend/src/components/tasks/TaskDetail.tsx
index ca91f76..5a8d0be 100644
--- a/frontend/src/components/tasks/TaskDetail.tsx
+++ b/frontend/src/components/tasks/TaskDetail.tsx
@@ -195,7 +195,7 @@ export function TaskDetail({ taskId, onClose }: TaskDetailProps) {
               id="assignee-id"
               value={assigneeId}
               onChange={(e) => setAssigneeId(e.target.value)}
-              placeholder="UUID"
+              placeholder={t('taskDetail.uuid')}
               className="w-64"
             />
           </div>
diff --git a/frontend/src/components/ui/Modal.tsx b/frontend/src/components/ui/Modal.tsx
index b86e9e3..41a9058 100644
--- a/frontend/src/components/ui/Modal.tsx
+++ b/frontend/src/components/ui/Modal.tsx
@@ -1,6 +1,7 @@
 import React, { useEffect, useRef } from 'react';
 import clsx from 'clsx';
 import { X } from 'lucide-react';
+import { useTranslation } from 'react-i18next';
 
 export interface ModalProps {
   open: boolean;
@@ -32,6 +33,7 @@ export function Modal({
   showCloseButton = true,
   fullScreenMobile = false,
 }: ModalProps) {
+  const { t } = useTranslation();
   const dialogRef = useRef<HTMLDivElement>(null);
   const previouslyFocused = useRef<HTMLElement | null>(null);
 
@@ -98,7 +100,7 @@ export function Modal({
           <button
             onClick={onClose}
             className="absolute top-3 right-3 md:top-4 md:right-4 text-secondary-400 hover:text-secondary-600 min-h-touch min-w-touch flex items-center justify-center rounded-md focus:outline-none focus-visible:ring-2 focus-visible:ring-primary-500"
-            aria-label="Close dialog"
+            aria-label={t('modal.closedialog')}
           >
             <X className="h-5 w-5" aria-hidden="true" />
           </button>
diff --git a/frontend/src/components/ui/Pagination.tsx b/frontend/src/components/ui/Pagination.tsx
index 86adce5..e8b7237 100644
--- a/frontend/src/components/ui/Pagination.tsx
+++ b/frontend/src/components/ui/Pagination.tsx
@@ -31,7 +31,7 @@ export function Pagination({ currentPage, totalPages, total, pageSize, onPageCha
   if (totalPages <= 1) return null;
 
   return (
-    <nav className="flex items-center justify-between px-3 py-1.5 border-t border-secondary-200 bg-white" aria-label="Pagination">
+    <nav className="flex items-center justify-between px-3 py-1.5 border-t border-secondary-200 bg-white" aria-label={t('pagination.pagination')}>
       <div className="text-xs text-secondary-500">
         <span>{start}–{end}</span> <span>{t('table.of')}</span> <span>{total}</span>
       </div>
diff --git a/frontend/src/components/ui/Skeleton.tsx b/frontend/src/components/ui/Skeleton.tsx
index f604933..5b951d2 100644
--- a/frontend/src/components/ui/Skeleton.tsx
+++ b/frontend/src/components/ui/Skeleton.tsx
@@ -1,5 +1,6 @@
 import React from 'react';
 import clsx from 'clsx';
+import { useTranslation } from 'react-i18next';
 
 export interface SkeletonProps {
   className?: string;
@@ -9,6 +10,7 @@ export interface SkeletonProps {
 }
 
 export function Skeleton({ className, variant = 'rect', width, height }: SkeletonProps) {
+  const { t } = useTranslation();
   const variantClass = {
     text: 'rounded',
     rect: 'rounded-md',
@@ -24,14 +26,15 @@ export function Skeleton({ className, variant = 'rect', width, height }: Skeleto
       )}
       style={{ width, height }}
       role="status"
-      aria-label="Wird geladen"
+      aria-label={t('skeleton.wirdgeladen')}
     />
   );
 }
 
 export function SkeletonText({ lines = 3, className }: { lines?: number; className?: string }) {
+  const { t } = useTranslation();
   return (
-    <div className={clsx('space-y-2', className)} role="status" aria-label="Wird geladen">
+    <div className={clsx('space-y-2', className)} role="status" aria-label={t('skeleton.wirdgeladen')}>
       {Array.from({ length: lines }).map((_, i) => (
         <Skeleton
           key={i}
diff --git a/frontend/src/components/ui/Table.tsx b/frontend/src/components/ui/Table.tsx
index 4fa30a6..34ba1f1 100644
--- a/frontend/src/components/ui/Table.tsx
+++ b/frontend/src/components/ui/Table.tsx
@@ -1,6 +1,7 @@
 import React, { useState, useMemo } from 'react';
 import clsx from 'clsx';
 import { Loader2 } from 'lucide-react';
+import { useTranslation } from 'react-i18next';
 
 export interface TableColumn<T> {
   key: string;
@@ -30,6 +31,7 @@ export function Table<T extends Record<string, any>>({
   emptyMessage = 'Keine Daten vorhanden',
   loading = false,
 }: TableProps<T>) {
+  const { t } = useTranslation();
   const [sortColumn, setSortColumn] = useState<string | null>(null);
   const [sortDirection, setSortDirection] = useState<SortDirection>('asc');
 
@@ -59,7 +61,7 @@ export function Table<T extends Record<string, any>>({
   };
 
   return (
-    <div className="overflow-x-auto" role="region" aria-label="Data table">
+    <div className="overflow-x-auto" role="region" aria-label={t('table.datatable')}>
       <table className="min-w-full divide-y divide-secondary-200">
         <thead>
           <tr>
@@ -102,7 +104,7 @@ export function Table<T extends Record<string, any>>({
               <td colSpan={columns.length} className="px-6 py-8 text-center text-secondary-500">
                 <span className="inline-flex items-center gap-2">
                   <Loader2 className="animate-spin motion-reduce:animate-none h-5 w-5" aria-hidden="true" />
-                  Wird geladen...
+                  {t('table.wirdgeladen')}
                 </span>
               </td>
             </tr>
diff --git a/frontend/src/components/ui/Toast.tsx b/frontend/src/components/ui/Toast.tsx
index f86019c..f28b001 100644
--- a/frontend/src/components/ui/Toast.tsx
+++ b/frontend/src/components/ui/Toast.tsx
@@ -2,6 +2,7 @@ import React, { useEffect, useCallback } from 'react';
 import clsx from 'clsx';
 import { Check, X, AlertTriangle, Info } from 'lucide-react';
 import { useUIStore, Toast as ToastType } from '@/store/uiStore';
+import { useTranslation } from 'react-i18next';
 
 const toastStyles: Record<ToastType['type'], string> = {
   success: 'bg-success-50 border-success-500 text-success-800',
@@ -18,6 +19,7 @@ const toastIcons: Record<ToastType['type'], React.ComponentType<{ className?: st
 };
 
 function ToastItem({ toast, onRemove }: { toast: ToastType; onRemove: (id: string) => void }) {
+  const { t } = useTranslation();
   useEffect(() => {
     const duration = toast.duration ?? 5000;
     const timer = setTimeout(() => onRemove(toast.id), duration);
@@ -42,7 +44,7 @@ function ToastItem({ toast, onRemove }: { toast: ToastType; onRemove: (id: strin
       <button
         onClick={() => onRemove(toast.id)}
         className="flex-shrink-0 text-current opacity-60 hover:opacity-100 min-h-touch min-w-touch flex items-center justify-center rounded focus:outline-none focus-visible:ring-2 focus-visible:ring-current"
-        aria-label="Close notification"
+        aria-label={t('toast.closenotification')}
       >
         <X className="h-4 w-4" aria-hidden="true" />
       </button>
diff --git a/frontend/src/components/window/AiChatPanel.tsx b/frontend/src/components/window/AiChatPanel.tsx
index 58a1792..cc2bf10 100644
--- a/frontend/src/components/window/AiChatPanel.tsx
+++ b/frontend/src/components/window/AiChatPanel.tsx
@@ -3,6 +3,7 @@ import React, { useState, useRef, useEffect, useCallback } from 'react';
 import { Sparkles, Send } from 'lucide-react';
 import { streamChat, fetchMessages } from '@/api/ai';
 import { apiClient } from '@/api/client';
+import { useTranslation } from 'react-i18next';
 
 interface AiChatPanelProps {
   windowTitle: string;
@@ -16,6 +17,7 @@ interface SimpleMessage {
 }
 
 export function AiChatPanel({ windowTitle, windowType }: AiChatPanelProps) {
+  const { t } = useTranslation();
   const [messages, setMessages] = useState<SimpleMessage[]>([]);
   const [input, setInput] = useState('');
   const [isStreaming, setIsStreaming] = useState(false);
@@ -118,10 +120,10 @@ export function AiChatPanel({ windowTitle, windowType }: AiChatPanelProps) {
       <div className="flex flex-col h-full">
         <div className="px-4 py-2 border-b border-secondary-200 bg-secondary-50 flex items-center gap-2">
           <Sparkles className="w-4 h-4 text-primary-500" />
-          <span className="text-sm font-semibold text-secondary-700">KI Assistent</span>
+          <span className="text-sm font-semibold text-secondary-700">{t('aiChatPanel.kiassistent')}</span>
         </div>
         <div className="flex-1 flex items-center justify-center text-sm text-secondary-400">
-          Verbinde mit KI...
+          {t('aiChatPanel.verbindemitki')}
         </div>
       </div>
     );
@@ -132,7 +134,7 @@ export function AiChatPanel({ windowTitle, windowType }: AiChatPanelProps) {
       <div className="flex flex-col h-full">
         <div className="px-4 py-2 border-b border-secondary-200 bg-secondary-50 flex items-center gap-2">
           <Sparkles className="w-4 h-4 text-primary-500" />
-          <span className="text-sm font-semibold text-secondary-700">KI Assistent</span>
+          <span className="text-sm font-semibold text-secondary-700">{t('aiChatPanel.kiassistent')}</span>
         </div>
         <div className="flex-1 flex items-center justify-center p-4 text-center">
           <div>
@@ -149,7 +151,7 @@ export function AiChatPanel({ windowTitle, windowType }: AiChatPanelProps) {
       {/* Header */}
       <div className="px-4 py-2 border-b border-secondary-200 bg-secondary-50 flex items-center gap-2">
         <Sparkles className="w-4 h-4 text-primary-500" />
-        <span className="text-sm font-semibold text-secondary-700">KI Assistent</span>
+        <span className="text-sm font-semibold text-secondary-700">{t('aiChatPanel.kiassistent')}</span>
       </div>
 
       {/* Context info */}
@@ -161,7 +163,7 @@ export function AiChatPanel({ windowTitle, windowType }: AiChatPanelProps) {
       <div ref={scrollRef} className="flex-1 overflow-y-auto p-4 space-y-2">
         {messages.length === 0 && !streamingContent && (
           <p className="text-sm text-secondary-400 text-center mt-4">
-            Stelle eine Frage zum aktuellen Fenster...
+            {t('aiChatPanel.stelleeinefragezumaktuellenfenster')}
           </p>
         )}
         {messages.map((msg) => (
@@ -193,7 +195,7 @@ export function AiChatPanel({ windowTitle, windowType }: AiChatPanelProps) {
             value={input}
             onChange={(e) => setInput(e.target.value)}
             onKeyDown={handleKeyDown}
-            placeholder="Nachricht eingeben..."
+            placeholder={t('aiChatPanel.nachrichteingeben')}
             rows={1}
             className="flex-1 px-3 py-2 text-sm rounded-md border border-secondary-300 focus:outline-none focus:ring-2 focus:ring-primary-500 resize-none"
             disabled={isStreaming}
@@ -202,7 +204,7 @@ export function AiChatPanel({ windowTitle, windowType }: AiChatPanelProps) {
             onClick={handleSend}
             disabled={!input.trim() || isStreaming}
             className="p-2 rounded-md bg-primary-600 text-white hover:bg-primary-700 disabled:opacity-50 disabled:cursor-not-allowed"
-            aria-label="Senden"
+            aria-label={t('aiChatPanel.senden')}
           >
             <Send className="w-4 h-4" />
           </button>
diff --git a/frontend/src/components/window/Window.tsx b/frontend/src/components/window/Window.tsx
index 3743410..b0c60ee 100644
--- a/frontend/src/components/window/Window.tsx
+++ b/frontend/src/components/window/Window.tsx
@@ -3,12 +3,14 @@ import clsx from 'clsx';
 import { Sparkles, Maximize2, Minimize2, Minus, X } from 'lucide-react';
 import { useWindowStore, type WindowState } from '@/store/windowStore';
 import { AiChatPanel } from './AiChatPanel';
+import { useTranslation } from 'react-i18next';
 
 interface WindowProps {
   window: WindowState;
 }
 
 export function Window({ window: win }: WindowProps) {
+  const { t } = useTranslation();
   const {
     closeWindow,
     minimizeWindow,
@@ -106,8 +108,8 @@ export function Window({ window: win }: WindowProps) {
               'p-1.5 rounded hover:bg-secondary-200',
               win.aiChatVisible && 'bg-primary-100 text-primary-600'
             )}
-            aria-label="KI Chat ein/aus"
-            title="KI Chat"
+            aria-label={t('window.kichateinaus')}
+            title={t('window.kichat')}
           >
             <Sparkles className="w-4 h-4" />
           </button>
@@ -128,8 +130,8 @@ export function Window({ window: win }: WindowProps) {
           <button
             onClick={() => minimizeWindow(win.id)}
             className="p-1.5 rounded hover:bg-secondary-200"
-            aria-label="Minimieren"
-            title="Minimieren"
+            aria-label={t('window.minimieren')}
+            title={t('window.minimieren')}
           >
             <Minus className="w-4 h-4" />
           </button>
@@ -137,8 +139,8 @@ export function Window({ window: win }: WindowProps) {
           <button
             onClick={() => closeWindow(win.id)}
             className="p-1.5 rounded hover:bg-danger-100 hover:text-danger-600"
-            aria-label="Schließen"
-            title="Schließen"
+            aria-label={t('window.schließen')}
+            title={t('window.schließen')}
           >
             <X className="w-4 h-4" />
           </button>
diff --git a/frontend/src/components/workflows/StepConfigPanel.tsx b/frontend/src/components/workflows/StepConfigPanel.tsx
index c3c4aaa..cb4e468 100644
--- a/frontend/src/components/workflows/StepConfigPanel.tsx
+++ b/frontend/src/components/workflows/StepConfigPanel.tsx
@@ -3,6 +3,7 @@ import { Select } from '@/components/ui/Select';
 import { Input } from '@/components/ui/Input';
 import { Code2, FormInput } from 'lucide-react';
 import type { WorkflowStep, WorkflowStepType } from '@/api/workflows';
+import { useTranslation } from 'react-i18next';
 
 const stepTypeOptions: { value: WorkflowStepType; label: string }[] = [
   { value: 'action', label: 'Action' },
@@ -53,6 +54,7 @@ export interface StepConfigPanelProps {
 }
 
 export function StepConfigPanel({ step, onChange }: StepConfigPanelProps) {
+  const { t } = useTranslation();
   const [mode, setMode] = useState<ConfigMode>('form');
   const [configText, setConfigText] = useState('');
   const [configError, setConfigError] = useState<string | undefined>(undefined);
@@ -111,6 +113,7 @@ export function StepConfigPanel({ step, onChange }: StepConfigPanelProps) {
   };
 
   const renderTypeForm = () => {
+    const { t } = useTranslation();
     switch (step.type) {
       case 'wait':
         return (
@@ -126,13 +129,13 @@ export function StepConfigPanel({ step, onChange }: StepConfigPanelProps) {
                   e.target.value === '' ? undefined : Number(e.target.value)
                 )
               }
-              placeholder="z.B. 3600"
+              placeholder={t('stepConfigPanel.zb3600')}
             />
             <Input
               label="Resume-Zeitpunkt (ISO)"
               value={strVal('resume_at')}
               onChange={(e) => setConfig('resume_at', e.target.value || undefined)}
-              placeholder="2026-08-18T09:00:00Z"
+              placeholder={t('stepConfigPanel.20260818t090000z')}
             />
           </div>
         );
@@ -151,7 +154,7 @@ export function StepConfigPanel({ step, onChange }: StepConfigPanelProps) {
                 required
                 value={strVal('url')}
                 onChange={(e) => setConfig('url', e.target.value)}
-                placeholder="https://api.example.com/webhook"
+                placeholder={t('stepConfigPanel.httpsapiexamplecomwebhook')}
               />
             </div>
             <JsonField
@@ -168,7 +171,7 @@ export function StepConfigPanel({ step, onChange }: StepConfigPanelProps) {
                 onChange={(e) => setConfig('body', e.target.value)}
                 rows={3}
                 className="w-full rounded-lg border border-secondary-300 px-3 py-2 text-sm font-mono focus:outline-none focus:ring-2 focus:ring-primary-500"
-                placeholder='{"key": "value"}'
+                placeholder={t('stepConfigPanel.keyvalue')}
               />
             </div>
             <Input
@@ -194,14 +197,14 @@ export function StepConfigPanel({ step, onChange }: StepConfigPanelProps) {
                 required
                 value={strVal('to')}
                 onChange={(e) => setConfig('to', e.target.value)}
-                placeholder="empfaenger@example.com"
+                placeholder={t('stepConfigPanel.empfaengerexamplecom')}
               />
               <Input
                 label="Betreff"
                 required
                 value={strVal('subject')}
                 onChange={(e) => setConfig('subject', e.target.value)}
-                placeholder="Betreff"
+                placeholder={t('stepConfigPanel.betreff')}
               />
             </div>
             <div>
@@ -213,14 +216,14 @@ export function StepConfigPanel({ step, onChange }: StepConfigPanelProps) {
                 onChange={(e) => setConfig('body', e.target.value)}
                 rows={4}
                 className="w-full rounded-lg border border-secondary-300 px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-primary-500"
-                placeholder="Nachrichtentext"
+                placeholder={t('stepConfigPanel.nachrichtentext')}
               />
             </div>
             <Input
               label="Account-ID (optional)"
               value={strVal('account_id')}
               onChange={(e) => setConfig('account_id', e.target.value || undefined)}
-              placeholder="Standard-Konto wenn leer"
+              placeholder={t('stepConfigPanel.standardkontowennleer')}
             />
           </div>
         );
@@ -240,19 +243,19 @@ export function StepConfigPanel({ step, onChange }: StepConfigPanelProps) {
                   label="Titel"
                   value={strVal('title')}
                   onChange={(e) => setConfig('title', e.target.value)}
-                  placeholder="Event-Titel"
+                  placeholder={t('stepConfigPanel.eventtitel')}
                 />
                 <Input
                   label="Start (ISO)"
                   value={strVal('start')}
                   onChange={(e) => setConfig('start', e.target.value)}
-                  placeholder="2026-08-18T09:00:00Z"
+                  placeholder={t('stepConfigPanel.20260818t090000z')}
                 />
                 <Input
                   label="Ende (ISO)"
                   value={strVal('end')}
                   onChange={(e) => setConfig('end', e.target.value)}
-                  placeholder="2026-08-18T10:00:00Z"
+                  placeholder={t('stepConfigPanel.20260818t100000z')}
                 />
               </div>
             )}
@@ -261,7 +264,7 @@ export function StepConfigPanel({ step, onChange }: StepConfigPanelProps) {
                 label="Event-ID"
                 value={strVal('event_id')}
                 onChange={(e) => setConfig('event_id', e.target.value)}
-                placeholder="Event-UUID"
+                placeholder={t('stepConfigPanel.eventuuid')}
               />
             )}
           </div>
@@ -282,7 +285,7 @@ export function StepConfigPanel({ step, onChange }: StepConfigPanelProps) {
                 label="Suchbegriff"
                 value={strVal('query')}
                 onChange={(e) => setConfig('query', e.target.value)}
-                placeholder="Suchbegriff"
+                placeholder={t('stepConfigPanel.suchbegriff')}
               />
             )}
             {action === 'download' && (
@@ -290,7 +293,7 @@ export function StepConfigPanel({ step, onChange }: StepConfigPanelProps) {
                 label="Datei-ID"
                 value={strVal('file_id')}
                 onChange={(e) => setConfig('file_id', e.target.value)}
-                placeholder="Datei-UUID"
+                placeholder={t('stepConfigPanel.dateiuuid')}
               />
             )}
             {action === 'upload' && (
@@ -299,13 +302,13 @@ export function StepConfigPanel({ step, onChange }: StepConfigPanelProps) {
                   label="Dateiname"
                   value={strVal('file_name')}
                   onChange={(e) => setConfig('file_name', e.target.value)}
-                  placeholder="datei.pdf"
+                  placeholder={t('stepConfigPanel.dateipdf')}
                 />
                 <Input
                   label="Inhalt"
                   value={strVal('content')}
                   onChange={(e) => setConfig('content', e.target.value)}
-                  placeholder="Dateiinhalt"
+                  placeholder={t('stepConfigPanel.dateiinhalt')}
                 />
               </div>
             )}
@@ -320,13 +323,13 @@ export function StepConfigPanel({ step, onChange }: StepConfigPanelProps) {
               required
               value={strVal('query')}
               onChange={(e) => setConfig('query', e.target.value)}
-              placeholder="Suchbegriff"
+              placeholder={t('stepConfigPanel.suchbegriff')}
             />
             <Input
               label="Entity-Typ (optional)"
               value={strVal('entity_type')}
               onChange={(e) => setConfig('entity_type', e.target.value || undefined)}
-              placeholder="contact, company, file, ..."
+              placeholder={t('stepConfigPanel.contactcompanyfile')}
             />
             <Input
               label="Limit"
@@ -347,7 +350,7 @@ export function StepConfigPanel({ step, onChange }: StepConfigPanelProps) {
               required
               value={strVal('agent_id')}
               onChange={(e) => setConfig('agent_id', e.target.value)}
-              placeholder="Agent-UUID"
+              placeholder={t('stepConfigPanel.agentuuid')}
             />
             <JsonField
               label="Input (JSON)"
@@ -361,7 +364,7 @@ export function StepConfigPanel({ step, onChange }: StepConfigPanelProps) {
                 onChange={(e) => setConfig('wait_for_completion', e.target.checked)}
                 className="rounded border-secondary-300 text-primary-600 focus:ring-primary-500"
               />
-              Auf Abschluss warten
+              {t('stepConfigPanel.aufabschlusswarten')}
             </label>
           </div>
         );
@@ -380,7 +383,7 @@ export function StepConfigPanel({ step, onChange }: StepConfigPanelProps) {
                 label="Entity-ID"
                 value={strVal('entity_id')}
                 onChange={(e) => setConfig('entity_id', e.target.value)}
-                placeholder="Entity-UUID"
+                placeholder={t('stepConfigPanel.entityuuid')}
               />
             )}
             {(action.includes('create') || action.includes('update')) && (
@@ -397,14 +400,14 @@ export function StepConfigPanel({ step, onChange }: StepConfigPanelProps) {
         return (
           <div>
             <label className="block text-sm font-medium text-secondary-700 mb-1">
-              Konfiguration (JSON)
+              {t('stepConfigPanel.konfigurationjson')}
             </label>
             <textarea
               value={configText}
               onChange={(e) => handleConfigChange(e.target.value)}
               rows={5}
               className="w-full rounded-lg border border-secondary-300 px-3 py-2 text-sm font-mono focus:outline-none focus:ring-2 focus:ring-primary-500"
-              placeholder='{"key": "value"}'
+              placeholder={t('stepConfigPanel.keyvalue')}
             />
             {configError && (
               <p className="mt-1 text-sm text-danger-600" role="alert">
@@ -424,7 +427,7 @@ export function StepConfigPanel({ step, onChange }: StepConfigPanelProps) {
           required
           value={step.name}
           onChange={(e) => onChange({ ...step, name: e.target.value })}
-          placeholder="z.B. Genehmigung einholen"
+          placeholder={t('stepConfigPanel.zbgenehmigungeinholen')}
         />
         <Select
           label="Typ"
@@ -445,7 +448,7 @@ export function StepConfigPanel({ step, onChange }: StepConfigPanelProps) {
           onChange={(e) => onChange({ ...step, description: e.target.value || null })}
           rows={2}
           className="w-full rounded-lg border border-secondary-300 px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-primary-500"
-          placeholder="Optionale Beschreibung"
+          placeholder={t('stepConfigPanel.optionalebeschreibung')}
         />
       </div>
 
@@ -484,14 +487,14 @@ export function StepConfigPanel({ step, onChange }: StepConfigPanelProps) {
       ) : (
         <div>
           <label className="block text-sm font-medium text-secondary-700 mb-1">
-            Konfiguration (JSON)
+            {t('stepConfigPanel.konfigurationjson')}
           </label>
           <textarea
             value={configText}
             onChange={(e) => handleConfigChange(e.target.value)}
             rows={5}
             className="w-full rounded-lg border border-secondary-300 px-3 py-2 text-sm font-mono focus:outline-none focus:ring-2 focus:ring-primary-500"
-            placeholder='{"key": "value"}'
+            placeholder={t('stepConfigPanel.keyvalue')}
           />
           {configError && (
             <p className="mt-1 text-sm text-danger-600" role="alert">
@@ -511,6 +514,7 @@ interface JsonFieldProps {
 }
 
 function JsonField({ label, value, onChange }: JsonFieldProps) {
+  const { t } = useTranslation();
   const [text, setText] = useState(value);
   const [error, setError] = useState<string | undefined>(undefined);
 
@@ -543,7 +547,7 @@ function JsonField({ label, value, onChange }: JsonFieldProps) {
         onChange={(e) => handleChange(e.target.value)}
         rows={3}
         className="w-full rounded-lg border border-secondary-300 px-3 py-2 text-sm font-mono focus:outline-none focus:ring-2 focus:ring-primary-500"
-        placeholder='{"key": "value"}'
+        placeholder={t('stepConfigPanel.keyvalue')}
       />
       {error && (
         <p className="mt-1 text-sm text-danger-600" role="alert">
diff --git a/frontend/src/components/workflows/WorkflowEditor.tsx b/frontend/src/components/workflows/WorkflowEditor.tsx
index e82cffc..5f9fa0e 100644
--- a/frontend/src/components/workflows/WorkflowEditor.tsx
+++ b/frontend/src/components/workflows/WorkflowEditor.tsx
@@ -391,7 +391,7 @@ export function WorkflowEditor({ open, workflow, onClose }: WorkflowEditorProps)
               }`}
               aria-pressed={mode === 'json'}
             >
-              <Code2 className="h-3.5 w-3.5" /> JSON Expert
+              <Code2 className="h-3.5 w-3.5" /> {t('workflowEditor.jsonexpert')}
             </button>
           </div>
         </div>
@@ -428,7 +428,7 @@ export function WorkflowEditor({ open, workflow, onClose }: WorkflowEditorProps)
                 required
                 value={form.name}
                 onChange={(e) => updateField('name', e.target.value)}
-                placeholder="z.B. Deal-Genehmigungsprozess"
+                placeholder={t('workflowEditor.zbdealgenehmigungsprozess')}
               />
               <div>
                 <label className="block text-sm font-medium text-secondary-700 mb-1">
@@ -439,7 +439,7 @@ export function WorkflowEditor({ open, workflow, onClose }: WorkflowEditorProps)
                   onChange={(e) => updateField('description', e.target.value)}
                   rows={2}
                   className="w-full rounded-lg border border-secondary-300 px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-primary-500"
-                  placeholder="Optionale Beschreibung"
+                  placeholder={t('workflowEditor.optionalebeschreibung')}
                 />
               </div>
               <Select
@@ -472,12 +472,12 @@ export function WorkflowEditor({ open, workflow, onClose }: WorkflowEditorProps)
                   type="button"
                   icon={<Plus className="h-4 w-4" />}
                 >
-                  Schritt hinzufuegen
+                  {t('workflowEditor.schritthinzufuegen')}
                 </Button>
               </div>
               {form.steps.length === 0 && (
                 <p className="text-sm text-secondary-400 italic">
-                  Keine Schritte definiert. Klicke auf Schritt hinzufuegen.
+                  {t('workflowEditor.keineschrittedefiniertklickeaufschritt')}
                 </p>
               )}
               <div className="space-y-4">
@@ -493,7 +493,7 @@ export function WorkflowEditor({ open, workflow, onClose }: WorkflowEditorProps)
                           onClick={() => moveStep(i, 'up')}
                           disabled={i === 0}
                           className="text-secondary-400 hover:text-secondary-700 disabled:opacity-30 p-1"
-                          aria-label="Nach oben"
+                          aria-label={t('workflowEditor.nachoben')}
                         >
                           <ArrowUp className="h-4 w-4" />
                         </button>
@@ -502,7 +502,7 @@ export function WorkflowEditor({ open, workflow, onClose }: WorkflowEditorProps)
                           onClick={() => moveStep(i, 'down')}
                           disabled={i === form.steps.length - 1}
                           className="text-secondary-400 hover:text-secondary-700 disabled:opacity-30 p-1"
-                          aria-label="Nach unten"
+                          aria-label={t('workflowEditor.nachunten')}
                         >
                           <ArrowDown className="h-4 w-4" />
                         </button>
@@ -510,7 +510,7 @@ export function WorkflowEditor({ open, workflow, onClose }: WorkflowEditorProps)
                           type="button"
                           onClick={() => removeStep(i)}
                           className="text-danger-500 hover:text-danger-700 p-1"
-                          aria-label="Schritt entfernen"
+                          aria-label={t('workflowEditor.schrittentfernen')}
                         >
                           <Trash2 className="h-4 w-4" />
                         </button>
@@ -528,14 +528,14 @@ export function WorkflowEditor({ open, workflow, onClose }: WorkflowEditorProps)
         ) : (
           <div>
             <label className="block text-sm font-medium text-secondary-700 mb-1">
-              Workflow (JSON)
+              {t('workflowEditor.workflowjson')}
             </label>
             <textarea
               value={jsonText}
               onChange={(e) => handleJsonChange(e.target.value)}
               rows={18}
               className="w-full rounded-lg border border-secondary-300 px-3 py-2 text-sm font-mono focus:outline-none focus:ring-2 focus:ring-primary-500"
-              placeholder='{"name": "...", "steps": [...]}'
+              placeholder={t('workflowEditor.namesteps')}
             />
             {jsonError && (
               <p className="mt-1 text-sm text-danger-600" role="alert">
diff --git a/frontend/src/components/workflows/WorkflowInstanceList.tsx b/frontend/src/components/workflows/WorkflowInstanceList.tsx
index d256a7b..75784c8 100644
--- a/frontend/src/components/workflows/WorkflowInstanceList.tsx
+++ b/frontend/src/components/workflows/WorkflowInstanceList.tsx
@@ -7,6 +7,7 @@ import { Skeleton } from '@/components/ui/Skeleton';
 import { EmptyState } from '@/components/ui/EmptyState';
 import { Card } from '@/components/ui/Card';
 import { AlertCircle, ChevronRight } from 'lucide-react';
+import { useTranslation } from 'react-i18next';
 
 const statusFilterOptions = [
   { value: '', label: 'Alle Status' },
@@ -54,6 +55,7 @@ export interface WorkflowInstanceListProps {
 export function WorkflowInstanceList({
   onSelectInstance,
 }: WorkflowInstanceListProps) {
+  const { t } = useTranslation();
   const [statusFilter, setStatusFilter] = useState<string>('');
   const [page, setPage] = useState(1);
   const pageSize = 20;
@@ -103,12 +105,12 @@ export function WorkflowInstanceList({
         <Card className="p-6">
           <div className="flex items-center gap-3 text-danger-600">
             <AlertCircle className="h-5 w-5" />
-            <span>Fehler beim Laden der Instanzen</span>
+            <span>{t('workflowInstanceList.fehlerbeimladenderinstanzen')}</span>
             <button
               onClick={() => refetch()}
               className="text-sm text-primary-600 hover:underline"
             >
-              Erneut versuchen
+              {t('workflowInstanceList.erneutversuchen')}
             </button>
           </div>
         </Card>
@@ -117,7 +119,7 @@ export function WorkflowInstanceList({
       {/* Empty state */}
       {!isLoading && !isError && instances.length === 0 && (
         <EmptyState
-          title="Keine Workflow-Instanzen"
+          title={t('workflowInstanceList.keineworkflowinstanzen')}
           description="Es wurden keine Instanzen gefunden, die dem Filter entsprechen."
         />
       )}
diff --git a/frontend/src/i18n/locales/de.json b/frontend/src/i18n/locales/de.json
index 4bdc859..d084745 100644
--- a/frontend/src/i18n/locales/de.json
+++ b/frontend/src/i18n/locales/de.json
@@ -1,7 +1,9 @@
 {
   "app": {
     "name": "leocrm",
-    "tagline": "Mini-CRM für kleine Unternehmen"
+    "tagline": "Mini-CRM für kleine Unternehmen",
+    "siesindofflineänderungenwerdengespeicher": "Sie sind offline. Änderungen werden gespeichert wenn die Verbindung wiederhergestellt ist.",
+    "zumhauptinhaltspringen": "Zum Hauptinhalt springen"
   },
   "nav": {
     "dashboard": "Dashboard",
@@ -138,7 +140,10 @@
         "down": "Nicht verfügbar",
         "unknown": "Unbekannt"
       }
-    }
+    },
+    "llmcost24h": "LLM Cost (24h)",
+    "llmtokens24h": "LLM Tokens (24h)",
+    "activeplugins": "Active Plugins"
   },
   "companies": {
     "title": "Firmen",
@@ -331,7 +336,8 @@
     "livePreviewDescription": "So sieht die Anwendung mit dem aktuellen Theme aus",
     "resetTheme": "Zurücksetzen",
     "saveTheme": "Theme speichern",
-    "mcp": "MCP"
+    "mcp": "MCP",
+    "zurückzurstartseite": "Zurück zur Startseite"
   },
   "auditLog": {
     "title": "Audit-Log",
@@ -344,7 +350,10 @@
     "timestamp": "Zeitpunkt",
     "empty": "Keine Audit-Log-Einträge vorhanden.",
     "notAvailable": "Audit-Log ist aktuell nicht verfügbar.",
-    "entityId": "Entität-ID"
+    "entityId": "Entität-ID",
+    "annaschmidt": "anna.schmidt",
+    "createupdatedelete": "create, update, delete",
+    "companycontact": "company, contact"
   },
   "search": {
     "title": "Suchergebnisse",
@@ -398,7 +407,8 @@
     "success": "Erfolg",
     "error": "Fehler",
     "warning": "Warnung",
-    "info": "Information"
+    "info": "Information",
+    "closenotification": "Close notification"
   },
   "table": {
     "page": "Seite",
@@ -410,7 +420,9 @@
     "sortAscending": "Aufsteigend sortieren",
     "sortDescending": "Absteigend sortieren",
     "sortedBy": "Sortiert nach",
-    "empty": "Keine Daten vorhanden"
+    "empty": "Keine Daten vorhanden",
+    "datatable": "Data table",
+    "wirdgeladen": "Wird geladen..."
   },
   "confirmDialog": {
     "title": "Bestätigung erforderlich",
@@ -422,7 +434,8 @@
     "next": "Weiter",
     "page": "Seite {{page}}",
     "first": "Erste Seite",
-    "last": "Letzte Seite"
+    "last": "Letzte Seite",
+    "pagination": "Pagination"
   },
   "emptyState": {
     "title": "Nichts gefunden",
@@ -707,7 +720,9 @@
     "sortDesc": "Absteigend",
     "syncFailed": "Synchronisierung fehlgeschlagen",
     "syncing": "Synchronisiere...",
-    "autoSyncEnabled": "Auto-Sync aktiv"
+    "autoSyncEnabled": "Auto-Sync aktiv",
+    "zurückzuordnern": "Zurück zu Ordnern",
+    "zurückzurliste": "Zurück zur Liste"
   },
   "notifications": {
     "title": "Benachrichtigungseinstellungen",
@@ -1093,7 +1108,8 @@
     "invalidJson": "Ungültige JSON-Daten",
     "selectTemplateHint": "Wählen Sie eine Vorlage aus der Liste",
     "downloadHistory": "Download-Verlauf",
-    "noDownloads": "Noch keine Downloads"
+    "noDownloads": "Noch keine Downloads",
+    "keyvalue": "{\"key\": \"value\"}"
   },
   "tasks": {
     "title": "Aufgaben",
@@ -1146,7 +1162,12 @@
     "removeDependency": "Abhängigkeit entfernen",
     "targetDate": "Zieldatum",
     "progress": "Fortschritt",
-    "milestones": "Meilensteine"
+    "milestones": "Meilensteine",
+    "nachstatus": "Nach Status",
+    "nachpriorität": "Nach Priorität",
+    "alletasks": "Alle Tasks (",
+    "inbearbeitung": "In Bearbeitung",
+    "keinetasks": "Keine Tasks"
   },
   "savedFilters": {
     "save": "Filter speichern",
@@ -1440,5 +1461,595 @@
     "targetRoom": "Ziel-Raum",
     "targetRoomDescription": "Name des Raums in der Kommunikation, an den Status-Meldungen gesendet werden.",
     "defaultRoomName": "Live KI"
+  },
+  "activityFilter": {
+    "benutzername": "Benutzername"
+  },
+  "improvementPanel": {
+    "signalesammeln": "Signale sammeln",
+    "keinesignaleklickensieaufsammeln": "Keine Signale. Klicken Sie auf „Sammeln\" um zu starten.",
+    "mustererkennen": "Muster erkennen",
+    "keinemustersammelnsiezuerstsignale": "Keine Muster. Sammeln Sie zuerst Signale und klicken Sie dann auf „Erkennen\".",
+    "keinevorschläge": "Keine Vorschläge.",
+    "evaluieren": "Evaluieren",
+    "aktivieren": "Aktivieren",
+    "rollback": "Rollback",
+    "impactmessen": "Impact messen"
+  },
+  "suggestionBadge": {
+    "kivorschläge": "KI Vorschläge"
+  },
+  "suggestionCard": {
+    "ignorieren": "Ignorieren",
+    "ausgeführt": "✓ Ausgeführt"
+  },
+  "suggestionSidebar": {
+    "keinevorschlägevorhanden": "Keine Vorschläge vorhanden",
+    "diekianalysiertdeinenkontext": "Die KI analysiert deinen Kontext...",
+    "kivorschläge": "KI Vorschläge"
+  },
+  "blockRenderer": {
+    "unbekannterblocktyp": "Unbekannter Block-Typ:"
+  },
+  "contactCardBlock": {
+    "kontaktanzeigen": "Kontakt anzeigen"
+  },
+  "miniAppBlock": {
+    "keinekonfiguration": "Keine Konfiguration"
+  },
+  "entityHistoryPanel": {
+    "loadinghistory": "Loading history"
+  },
+  "printButton": {
+    "druckenoderalspdfexportieren": "Drucken oder als PDF exportieren",
+    "druckenpdf": "Drucken / PDF",
+    "alspdf": "Als PDF"
+  },
+  "saveFilterDialog": {
+    "keineaktivenfilterkriterien": "Keine aktiven Filterkriterien"
+  },
+  "shareDialog": {
+    "schließen": "Schließen",
+    "elementteilen": "Element teilen",
+    "gewährebenutzernodergruppenzugriffauf": "Gewähre Benutzern oder Gruppen Zugriff auf dieses Element. Die Berechtigungsstufe bestimmt,\n              welche Aktionen durchgeführt werden können.",
+    "nochkeineberechtigungenvergebendiesesele": "Noch keine Berechtigungen vergeben. Dieses Element ist nur für den Besitzer sichtbar.",
+    "ablaufdatumsetzen": "Ablaufdatum setzen",
+    "entfernen": "Entfernen",
+    "berechtigungentfernen": "Berechtigung entfernen",
+    "neueberechtigung": "Neue Berechtigung",
+    "ablaufdatumoptional": "Ablaufdatum (optional)",
+    "berechtigunghinzufügen": "Berechtigung hinzufügen"
+  },
+  "contactEditForm": {
+    "techcorpgmbh": "TechCorp GmbH",
+    "k00123": "K-00123",
+    "tag1tag2": "tag1, tag2"
+  },
+  "contactFolderTree": {
+    "optionen": "Optionen",
+    "mehrereordnerauswählen": "Mehrere Ordner auswählen",
+    "neuerordner": "Neuer Ordner",
+    "keineordnervorhanden": "Keine Ordner vorhanden",
+    "farbewählen": "Farbe wählen"
+  },
+  "contactList": {
+    "ordnerzuweisen": "Ordner zuweisen ▾",
+    "keineordner": "Keine Ordner",
+    "tagshinzufügen": "Tags hinzufügen ▾",
+    "tag1tag2": "tag1, tag2, ...",
+    "auswahlaufheben": "Auswahl aufheben",
+    "löschenbestätigen": "Löschen bestätigen",
+    "kontaktewirklichlöschen": "Kontakt(e) wirklich löschen?",
+    "customsortierungaktivdraganddrop": "Custom Sortierung aktiv — Drag-and-Drop zum Umsortieren",
+    "spaltenverwalten": "Spalten verwalten"
+  },
+  "filterPanel": {
+    "filter": "Filter",
+    "allelöschen": "Alle löschen",
+    "bedingungenverknüpfen": "Bedingungen verknüpfen:",
+    "gespeichertefilter": "Gespeicherte Filter",
+    "keinefilteraktivklickeuntenum": "Keine Filter aktiv. Klicke unten um eine Bedingung hinzuzufügen.",
+    "wählen": "— wählen —",
+    "wert": "Wert…",
+    "bedingunghinzufügen": "Bedingung hinzufügen",
+    "filterspeichern": "Filter speichern"
+  },
+  "folderPermissionDialog": {
+    "schließen": "Schließen",
+    "ordnerteilen": "Ordner teilen",
+    "gewährebenutzernodergruppenzugriffauf": "Gewähre Benutzern oder Gruppen Zugriff auf diesen Ordner. Mit „Vererben\" gelten die Rechte auch für alle Unterordner.",
+    "nochkeineberechtigungenvergebendieserord": "Noch keine Berechtigungen vergeben. Dieser Ordner ist nur für den Besitzer sichtbar.",
+    "entfernen": "Entfernen",
+    "berechtigungentfernen": "Berechtigung entfernen",
+    "neueberechtigung": "Neue Berechtigung",
+    "aufunterordnervererben": "Auf Unterordner vererben",
+    "berechtigunghinzufügen": "Berechtigung hinzufügen"
+  },
+  "groupPanel": {
+    "gruppierung": "Gruppierung",
+    "allelöschen": "Alle löschen",
+    "keinegruppierungaktivalledatensätzewerde": "Keine Gruppierung aktiv. Alle Datensätze werden in einer flachen Liste angezeigt.",
+    "gruppierunghinzufügen": "Gruppierung hinzufügen"
+  },
+  "saveViewDialog": {
+    "ansichtspeichern": "Ansicht speichern",
+    "namederansicht": "Name der Ansicht",
+    "zbmeinefirmenkontakte": "z.B. Meine Firmen-Kontakte",
+    "wassollgespeichertwerden": "Was soll gespeichert werden?",
+    "nichtaktiv": "nicht aktiv"
+  },
+  "sortPanel": {
+    "sortieren": "Sortieren",
+    "allelöschen": "Alle löschen",
+    "keinesortierungaktivdatensätzekönnenper": "Keine Sortierung aktiv. Datensätze können per Drag-and-Drop umsortiert werden.",
+    "sortierunghinzufügen": "Sortierung hinzufügen"
+  },
+  "customFieldRenderer": {
+    "required": "required",
+    "keineoptionenverfügbar": "Keine Optionen verfügbar",
+    "alleoptionenausgewählt": "Alle Optionen ausgewählt",
+    "bittewählen": "— Bitte wählen —"
+  },
+  "aISidebar": {
+    "chatsidebarcomingsoon": "Chat-Sidebar - Coming Soon",
+    "keinebenachrichtigungen": "Keine Benachrichtigungen",
+    "benachrichtigunglöschen": "Benachrichtigung löschen",
+    "dervollekichatistauf": "Der volle KI-Chat ist auf der AI-Assistant-Seite verfügbar.",
+    "aiassistantöffnen": "AI Assistant öffnen",
+    "einklappen": "Einklappen",
+    "kiassistenteinklappen": "KI Assistent einklappen",
+    "zurück": "Zurück"
+  },
+  "messageSidebar": {
+    "keinenachrichten": "Keine Nachrichten",
+    "senden": "Senden",
+    "einklappen": "Einklappen",
+    "messagingeinklappen": "Messaging einklappen",
+    "keinekonversationen": "Keine Konversationen",
+    "systemkonversationschreibgeschützt": "System-Konversation (schreibgeschützt)",
+    "zurück": "Zurück"
+  },
+  "pluginToolbar": {
+    "sucheschließen": "Suche schließen"
+  },
+  "sidebar": {
+    "seitenleistenavigation": "Seitenleiste Navigation",
+    "zurückzurstartseite": "Zurück zur Startseite",
+    "hauptnavigation": "Hauptnavigation"
+  },
+  "sortableMenuItem": {
+    "ziehenzumsortieren": "Ziehen zum Sortieren"
+  },
+  "topBar": {
+    "seitenleisteeinausklappen": "Seitenleiste ein-/ausklappen"
+  },
+  "composeModal": {
+    "recipientexamplecom": "recipient@example.com",
+    "ccexamplecom": "cc@example.com",
+    "bccexamplecom": "bcc@example.com",
+    "max25mbperfile": "Max 25 MB per file"
+  },
+  "mailComposeForm": {
+    "recipientexamplecom": "recipient@example.com",
+    "ccexamplecom": "cc@example.com",
+    "bccexamplecom": "bcc@example.com",
+    "max25mbperfile": "Max 25 MB per file"
+  },
+  "mailFilterPanel": {
+    "filter": "Filter",
+    "allelöschen": "Alle löschen",
+    "bedingungenverknüpfen": "Bedingungen verknüpfen:",
+    "gespeichertefilter": "Gespeicherte Filter",
+    "keinefilteraktivklickeuntenum": "Keine Filter aktiv. Klicke unten um eine Bedingung hinzuzufügen.",
+    "wählen": "— wählen —",
+    "wert": "Wert…",
+    "bedingunghinzufügen": "Bedingung hinzufügen",
+    "filterspeichern": "Filter speichern"
+  },
+  "mailFolderTree": {
+    "ordnerleeren": "Ordner leeren"
+  },
+  "mailGroupPanel": {
+    "gruppierung": "Gruppierung",
+    "allelöschen": "Alle löschen",
+    "keinegruppierungaktivklickeuntenum": "Keine Gruppierung aktiv. Klicke unten um ein Feld hinzuzufügen.",
+    "feldhinzufügen": "Feld hinzufügen"
+  },
+  "mailSortPanel": {
+    "sortieren": "Sortieren",
+    "allelöschen": "Alle löschen",
+    "keinesortierungaktivklickeuntenum": "Keine Sortierung aktiv. Klicke unten um ein Feld hinzuzufügen.",
+    "feldhinzufügen": "Feld hinzufügen"
+  },
+  "pgpSettings": {
+    "beginpgpprivatekeyblock": "-----BEGIN PGP PRIVATE KEY BLOCK-----",
+    "keyid": "Key ID:",
+    "contactuuid": "contact-uuid",
+    "beginpgppublickeyblock": "-----BEGIN PGP PUBLIC KEY BLOCK-----"
+  },
+  "richTextEditor": {
+    "textcolor": "Text color"
+  },
+  "signatureManager": {
+    "pmitfreundlichengrüßenbruser": "<p>Mit freundlichen Grüßen,<br>{{user.name}}</p>"
+  },
+  "notificationItem": {
+    "ungelesen": "ungelesen"
+  },
+  "pluginRouteRenderer": {
+    "loading": "Loading",
+    "pagenotfound": "Page Not Found",
+    "thepage": "The page",
+    "wasnotfound": "was not found."
+  },
+  "workspaceManager": {
+    "name": "Name",
+    "beschreibung": "Beschreibung",
+    "alsstandardworkspace": "Als Standard-Workspace",
+    "konfigurationbearbeiten": "Konfiguration bearbeiten",
+    "visiblefolderids": "{\"visible_folder_ids\": []}",
+    "jsonkonfigurationfürdiesesmodulz": "JSON-Konfiguration für dieses Modul (z.B. sichtbare Ordner-IDs)",
+    "module": "Module",
+    "bearbeiten": "Bearbeiten",
+    "löschen": "Löschen"
+  },
+  "activityFeed": {
+    "keineaktivitätenvorhanden": "Keine Aktivitäten vorhanden."
+  },
+  "dataGrid": {
+    "datagrid": "Data grid"
+  },
+  "searchDropdown": {
+    "alleergebnisseanzeigen": "Alle Ergebnisse anzeigen →"
+  },
+  "teamPanel": {
+    "keinemitarbeiter": "Keine Mitarbeiter",
+    "offline": "offline",
+    "keinegruppen": "Keine Gruppen"
+  },
+  "taskDetail": {
+    "uuid": "UUID"
+  },
+  "modal": {
+    "closedialog": "Close dialog"
+  },
+  "skeleton": {
+    "wirdgeladen": "Wird geladen"
+  },
+  "aiChatPanel": {
+    "kiassistent": "KI Assistent",
+    "verbindemitki": "Verbinde mit KI...",
+    "stelleeinefragezumaktuellenfenster": "Stelle eine Frage zum aktuellen Fenster...",
+    "nachrichteingeben": "Nachricht eingeben...",
+    "senden": "Senden"
+  },
+  "window": {
+    "kichateinaus": "KI Chat ein/aus",
+    "kichat": "KI Chat",
+    "minimieren": "Minimieren",
+    "schließen": "Schließen"
+  },
+  "stepConfigPanel": {
+    "zb3600": "z.B. 3600",
+    "20260818t090000z": "2026-08-18T09:00:00Z",
+    "httpsapiexamplecomwebhook": "https://api.example.com/webhook",
+    "keyvalue": "{\"key\": \"value\"}",
+    "empfaengerexamplecom": "empfaenger@example.com",
+    "betreff": "Betreff",
+    "nachrichtentext": "Nachrichtentext",
+    "standardkontowennleer": "Standard-Konto wenn leer",
+    "eventtitel": "Event-Titel",
+    "20260818t100000z": "2026-08-18T10:00:00Z",
+    "eventuuid": "Event-UUID",
+    "suchbegriff": "Suchbegriff",
+    "dateiuuid": "Datei-UUID",
+    "dateipdf": "datei.pdf",
+    "dateiinhalt": "Dateiinhalt",
+    "contactcompanyfile": "contact, company, file, ...",
+    "agentuuid": "Agent-UUID",
+    "aufabschlusswarten": "Auf Abschluss warten",
+    "entityuuid": "Entity-UUID",
+    "konfigurationjson": "Konfiguration (JSON)",
+    "zbgenehmigungeinholen": "z.B. Genehmigung einholen",
+    "optionalebeschreibung": "Optionale Beschreibung"
+  },
+  "workflowEditor": {
+    "jsonexpert": "JSON Expert",
+    "zbdealgenehmigungsprozess": "z.B. Deal-Genehmigungsprozess",
+    "optionalebeschreibung": "Optionale Beschreibung",
+    "schritthinzufuegen": "Schritt hinzufuegen",
+    "keineschrittedefiniertklickeaufschritt": "Keine Schritte definiert. Klicke auf Schritt hinzufuegen.",
+    "nachoben": "Nach oben",
+    "nachunten": "Nach unten",
+    "schrittentfernen": "Schritt entfernen",
+    "workflowjson": "Workflow (JSON)",
+    "namesteps": "{\"name\": \"...\", \"steps\": [...]}"
+  },
+  "workflowInstanceList": {
+    "fehlerbeimladenderinstanzen": "Fehler beim Laden der Instanzen",
+    "erneutversuchen": "Erneut versuchen",
+    "keineworkflowinstanzen": "Keine Workflow-Instanzen"
+  },
+  "aISettings": {
+    "azureopenai": "Azure OpenAI",
+    "modellepresets": "Modelle & Presets",
+    "presetname": "Preset Name",
+    "modellidzbgpt4o": "Modell ID (z.B. gpt-4o-mini)",
+    "anbieterwählen": "Anbieter wählen...",
+    "temperature": "Temperature",
+    "maxtokens": "Max Tokens",
+    "topp": "Top P",
+    "systempromptoptional": "System Prompt (optional)",
+    "temp": "· temp=",
+    "maxtokens2": "· max_tokens=",
+    "beschreibung": "Beschreibung",
+    "presetwählen": "Preset wählen...",
+    "systemprompt": "System Prompt",
+    "verfügbaretools": "Verfügbare Tools",
+    "diesetoolswerdenvonpluginsbereitgestellt": "Diese Tools werden von Plugins bereitgestellt und können Agenten zugewiesen werden.",
+    "keinetoolsverfügbarpluginskönnentools": "Keine Tools verfügbar. Plugins können Tools registrieren.",
+    "kiassistenteinstellungen": "KI Assistent Einstellungen"
+  },
+  "agentDashboard": {
+    "myagent": "My Agent",
+    "optionaldescription": "Optional description",
+    "gpt4": "gpt-4",
+    "youareahelpfulassistant": "You are a helpful assistant..."
+  },
+  "agents": {
+    "zurückzurstartseite": "Zurück zur Startseite",
+    "agentennavigation": "Agenten Navigation"
+  },
+  "automation": {
+    "zurückzurstartseite": "Zurück zur Startseite",
+    "automationnavigation": "Automation Navigation"
+  },
+  "automationDashboard": {
+    "myautomation": "My Automation",
+    "optionaldescription": "Optional description",
+    "contactcreated": "contact.created",
+    "cronexpressioneg09": "Cron expression (e.g. 0 9 * * * for daily at 9am)",
+    "field": "Field",
+    "value": "Value",
+    "removecondition": "Remove condition",
+    "url": "{\"url\": \"...\"}",
+    "removeaction": "Remove action"
+  },
+  "automationSettings": {
+    "gpt4": "gpt-4",
+    "mycustomapp": "my_custom_app",
+    "mycustomapp2": "My Custom App",
+    "appwindow": "AppWindow",
+    "optionaldescription": "Optional description",
+    "typeformfields": "{\"type\": \"form\", \"fields\": []}"
+  },
+  "communication": {
+    "keinekonversationen": "Keine Konversationen",
+    "miniapps": "Mini-Apps",
+    "inneuemfenster": "In neuem Fenster",
+    "keinenachrichtenschreibedieerste": "Keine Nachrichten. Schreibe die erste!",
+    "kiantwortet": "KI antwortet...",
+    "dateianhängen": "Datei anhängen",
+    "emoji": "Emoji",
+    "teilnehmerauswählen": "Teilnehmer auswählen",
+    "wähleeinekonversationaus": "Wähle eine Konversation aus"
+  },
+  "contactsList": {
+    "keinebenutzerdefiniertenansichten": "Keine benutzerdefinierten Ansichten",
+    "aktuelleansichtspeichern": "Aktuelle Ansicht speichern",
+    "gespeichertefilter": "Gespeicherte Filter"
+  },
+  "customFields": {
+    "zbbrancheabteilunggeburtsdatum": "z.B. Branche, Abteilung, Geburtsdatum",
+    "zbbrancheabteilunggeburtsdatum2": "z.B. branche, abteilung, geburtsdatum",
+    "option1option2option3": "Option 1, Option 2, Option 3"
+  },
+  "guestContacts": {
+    "weiterleitungzukontakten": "Weiterleitung zu Kontakten..."
+  },
+  "guestLogin": {
+    "weiterleitungzumlogin": "Weiterleitung zum Login..."
+  },
+  "help": {
+    "zurückzurstartseite": "Zurück zur Startseite",
+    "hilfenavigation": "Hilfe Navigation"
+  },
+  "importExport": {
+    "tabs": "Tabs"
+  },
+  "logs": {
+    "zurückzurstartseite": "Zurück zur Startseite",
+    "logsnavigation": "Logs Navigation"
+  },
+  "mailSettings": {
+    "userexamplecom": "user@example.com",
+    "johndoe": "John Doe",
+    "leerlassenfüremailadresse": "Leer lassen für E-Mail-Adresse",
+    "imapexamplecom": "imap.example.com",
+    "smtpexamplecom": "smtp.example.com",
+    "geteiltespostfachfüralletenantbenutzer": "Geteiltes Postfach (für alle Tenant-Benutzer sichtbar)",
+    "ordnerzuordnungbearbeiten": "Ordner-Zuordnung bearbeiten"
+  },
+  "noAccessPage": {
+    "keinzugriff": "Kein Zugriff",
+    "siehabenkeineberechtigungaufdiese": "Sie haben keine Berechtigung, auf diese Seite zuzugreifen.\n        Bitte wenden Sie sich an einen Administrator, falls Sie Zugriff benötigen.",
+    "zumdashboard": "Zum Dashboard"
+  },
+  "settingsBackup": {
+    "restore": "RESTORE"
+  },
+  "settingsMcp": {
+    "select": "-- Select --"
+  },
+  "settingsPlugins": {
+    "httpsexamplecompluginzip": "https://example.com/plugin.zip"
+  },
+  "settingsRechte": {
+    "löschen": "Löschen",
+    "freigabenübersicht": "Freigaben Übersicht",
+    "nameoderid": "Name oder ID...",
+    "berechtigunglöschen": "Berechtigung löschen",
+    "auditlogfürberechtigungen": "Audit-Log für Berechtigungen",
+    "rechteverwaltungtabs": "Rechteverwaltung Tabs"
+  },
+  "settingsSequences": {
+    "re": "RE-"
+  },
+  "settingsStammdaten": {
+    "bearbeiten": "Bearbeiten",
+    "löschen": "Löschen",
+    "adressverwaltung": "Adressverwaltung",
+    "ladeadressen": "Lade Adressen...",
+    "bankkontenverwaltung": "Bankkontenverwaltung",
+    "ladekonten": "Lade Konten...",
+    "stammdatentabs": "Stammdaten Tabs"
+  },
+  "settingsSystem": {
+    "systemtabs": "System Tabs"
+  },
+  "settingsTaxes": {
+    "de": "DE"
+  },
+  "settingsTheme": {
+    "2563eb": "#2563eb",
+    "d946ef": "#d946ef",
+    "primarybutton": "Primary Button",
+    "secondarybutton": "Secondary Button",
+    "dangerbutton": "Danger Button",
+    "ghostbutton": "Ghost Button",
+    "texteingeben": "Text eingeben...",
+    "diesisteinebeispielkartemit": "Dies ist eine Beispiel-Karte mit dem aktuellen Theme."
+  },
+  "settingsUserManagement": {
+    "nutzerverwaltungtabs": "Nutzerverwaltung Tabs"
+  },
+  "settingsUsers": {
+    "neumitarbeiterfirmade": "neu.mitarbeiter@firma.de"
+  },
+  "startPage": {
+    "zurückzurstartseite": "Zurück zur Startseite",
+    "wähleeinenworkspaceaus": "Wähle einen Workspace aus",
+    "workspacehinzufügen": "Workspace hinzufügen"
+  },
+  "workflows": {
+    "definierenundverwaltensieautomatisiertew": "Definieren und verwalten Sie automatisierte Workflows",
+    "fehlerbeimladenderworkflows": "Fehler beim Laden der Workflows",
+    "erneutversuchen": "Erneut versuchen",
+    "keineworkflows": "Keine Workflows",
+    "workflowerstellen": "Workflow erstellen",
+    "bearbeiten": "Bearbeiten",
+    "loeschen": "Loeschen",
+    "workflowloeschen": "Workflow loeschen"
+  },
+  "agentsOverview": {
+    "agentenübersicht": "Agenten Übersicht",
+    "verwaltensiekiagentenführensie": "Verwalten Sie KI-Agenten, führen Sie diese aus und überwachen Sie deren Ausführungen."
+  },
+  "agentsPlaceholder": {
+    "dieseseitewirdgeradeerstelltwählen": "Diese Seite wird gerade erstellt. Wählen Sie ein Thema aus dem Menü links."
+  },
+  "automationOverview": {
+    "automationübersicht": "Automation Übersicht",
+    "erstellenundverwaltensieautomatisiertewo": "Erstellen und verwalten Sie automatisierte Workflows. Definieren Sie Trigger, Bedingungen und Aktionen.",
+    "workflowserstellenundverwalten": "Workflows erstellen und verwalten",
+    "triggeraktionenundbedingungenkonfigurier": "Trigger, Aktionen und Bedingungen konfigurieren"
+  },
+  "automationPlaceholder": {
+    "dieseseitewirdgeradeerstelltwählen": "Diese Seite wird gerade erstellt. Wählen Sie ein Thema aus dem Menü links."
+  },
+  "helpApiDocs": {
+    "apidokumentation": "API Dokumentation",
+    "dievollständigeapidokumentationfindensie": "Die vollständige API-Dokumentation finden Sie unter",
+    "swaggerui": "(Swagger UI).",
+    "leocrmbieteteinerestapimit": "LeoCRM bietet eine REST-API mit über 224 Endpoints. Die API verwendet JSON für Request- und Response-Bodies.",
+    "dieapiverwendetsessionbasierteauthentifi": "Die API verwendet Session-basierte Authentifizierung mit HttpOnly-Cookies. Nach dem Login über",
+    "postapiv1authlogin": "POST /api/v1/auth/login",
+    "wirdeinsessioncookiegesetzt": "wird ein Session-Cookie gesetzt.",
+    "wichtigeendpoints": "Wichtige Endpoints",
+    "getapiv1contacts": "GET /api/v1/contacts",
+    "kontakteabrufen": "— Kontakte abrufen",
+    "postapiv1contacts": "POST /api/v1/contacts",
+    "kontakterstellen": "— Kontakt erstellen",
+    "getapiv1calendarentries": "GET /api/v1/calendar/entries",
+    "kalendereinträge": "— Kalendereinträge",
+    "getapiv1mailaccounts": "GET /api/v1/mail/accounts",
+    "mailkonten": "— Mail-Konten",
+    "getapiv1pluginsactivemanifests": "GET /api/v1/plugins/active-manifests",
+    "pluginmanifeste": "— Plugin-Manifeste",
+    "vollständigedoku": "Vollständige Doku:",
+    "swaggeruiöffnen": "Swagger UI öffnen"
+  },
+  "helpContacts": {
+    "kontakteverwalten": "Kontakte verwalten",
+    "kontakteerstellen": "Kontakte erstellen",
+    "gehensiezukontakteundklicken": "Gehen Sie zu Kontakte und klicken Sie auf \"Neuer Kontakt\". Füllen Sie die Felder aus und speichern Sie. Sie können Firmen und Personen anlegen.",
+    "jederfirmakönnenmehrerekontaktpersonenzu": "Jeder Firma können mehrere Kontaktpersonen zugeordnet werden. Öffnen Sie eine Firma und fügen Sie Personen hinzu.",
+    "verwendensietagsumkontaktezu": "Verwenden Sie Tags um Kontakte zu kategorisieren. Tags können frei vergeben werden und helfen bei der Filterung.",
+    "organisierensiekontakteinordnernordner": "Organisieren Sie Kontakte in Ordnern. Ordner können verschachtelt werden und eigene Berechtigungen haben."
+  },
+  "helpLogin": {
+    "loginanmeldung": "Login & Anmeldung",
+    "rufensiedieleocrmurlauf": "Rufen Sie die LeoCRM-URL auf (z.B. https://crm.media-on.de) und melden Sie sich mit Ihrer E-Mail-Adresse und Ihrem Passwort an.",
+    "passwortvergessen": "Passwort vergessen?",
+    "klickensieaufderloginseite": "Klicken Sie auf der Login-Seite auf \"Passwort vergessen\". Sie erhalten eine E-Mail mit einem Link zum Zurücksetzen Ihres Passworts.",
+    "ihresitzungwirdübereinsicheres": "Ihre Sitzung wird über ein sicheres HttpOnly-Cookie verwaltet",
+    "nachinaktivitätwirddiesitzungautomatisch": "Nach Inaktivität wird die Sitzung automatisch beendet",
+    "passwörterwerdenmitbcryptcost12": "Passwörter werden mit bcrypt (cost=12) verschlüsselt gespeichert"
+  },
+  "helpMailSetup": {
+    "postfacheinrichten": "Postfach einrichten",
+    "imapkontohinzufügen": "IMAP-Konto hinzufügen",
+    "gehensiezueinstellungenemailund": "Gehen Sie zu Einstellungen → Email und klicken Sie auf \"Konto hinzufügen\". Geben Sie Ihre IMAP- und SMTP-Serverdaten ein.",
+    "benötigtedaten": "Benötigte Daten",
+    "imapserverzbimapexample": "IMAP-Server (z.B. imap.example.com)",
+    "imapportmeist993fürssl": "IMAP-Port (meist 993 für SSL)",
+    "smtpserverzbsmtpexample": "SMTP-Server (z.B. smtp.example.com)",
+    "smtpportmeist587fürtls": "SMTP-Port (meist 587 für TLS)",
+    "emailadresseundpasswort": "E-Mail-Adresse und Passwort",
+    "nachdemeinrichtenwirdihrpostfach": "Nach dem Einrichten wird Ihr Postfach automatisch synchronisiert. Neue E-Mails werden im Hintergrund abgerufen."
+  },
+  "helpNavigation": {
+    "nachdemlogingelangensiezur": "Nach dem Login gelangen Sie zur Startseite. Hier können Sie einen Workspace auswählen oder zu den Einstellungen und der Hilfe navigieren.",
+    "einworkspaceistihrarbeitsbereichmit": "Ein Workspace ist Ihr Arbeitsbereich mit Sidebar-Navigation. Hier finden Sie Kontakte, Kalender, E-Mail und alle anderen Module.",
+    "dashamburgermenüobenlinksblendet": "Das Hamburger-Menü oben links blendet die Seitenleiste ein und aus. Die Sidebar zeigt alle verfügbaren Module.",
+    "rechtsnebendemhamburgermenüfinden": "Rechts neben dem Hamburger-Menü finden Sie einen Zurück-Pfeil, der Sie zurück zur Startseite bringt.",
+    "globalesuche": "Globale Suche",
+    "verwendensiedielupeobenoder": "Verwenden Sie die Lupe oben oder Strg+K um das Kommando-Palette zu öffnen und schnell nach Kontakten, Mails oder Dateien zu suchen."
+  },
+  "helpPlaceholder": {
+    "diesehilfeseite": "Diese Hilfeseite (",
+    "wirdgeradeerstelltschauensiespäter": ") wird gerade erstellt. Schauen Sie später wieder vorbei.",
+    "wählensieeinthemaausdem": "Wählen Sie ein Thema aus dem Menü links um weitere Hilfe-Artikel zu lesen."
+  },
+  "helpWelcome": {
+    "willkommenbeileocrm": "Willkommen bei LeoCRM",
+    "leocrmisteinselbstgehostetescrm": "LeoCRM ist ein selbst-gehostetes CRM-System für kleine Vertriebsteams. Es bietet Kontakte, Kalender, E-Mail, Dateiverwaltung und mehr — alles in einer Anwendung.",
+    "kontakteverwalten": "Kontakte verwalten",
+    "firmenpersonenkontaktdatenzentralspeiche": "— Firmen, Personen, Kontaktdaten zentral speichern",
+    "termineaufgabenunderinnerungen": "— Termine, Aufgaben und Erinnerungen",
+    "imappostfächersynchronisierendirektantwo": "— IMAP-Postfächer synchronisieren, direkt antworten",
+    "dateiendms": "Dateien (DMS)",
+    "dokumentehochladenteilenundverwalten": "— Dokumente hochladen, teilen und verwalten",
+    "intelligentehilfebeiderarbeit": "— Intelligente Hilfe bei der Arbeit",
+    "automatisierteprozesse": "— Automatisierte Prozesse",
+    "ersteschritte": "Erste Schritte",
+    "meldensiesichmitihrenzugangsdaten": "Melden Sie sich mit Ihren Zugangsdaten an",
+    "wählensieeinenworkspaceaufder": "Wählen Sie einen Workspace auf der Startseite",
+    "beginnensiemitdemanlegenvon": "Beginnen Sie mit dem Anlegen von Kontakten",
+    "richtensieihremailpostfach": "Richten Sie Ihr E-Mail-Postfach unter Einstellungen → Email ein",
+    "nutzensiedieglobalesuchelupe": "Nutzen Sie die globale Suche (Lupe oben) oder das Kommando-Palette (Strg+K) um schnell zu finden was Sie brauchen."
+  },
+  "logsOverview": {
+    "logsübersicht": "Logs Übersicht",
+    "systemundauditlogseinsehenfiltern": "System- und Audit-Logs einsehen, filtern und exportieren.",
+    "alleänderungennachverfolgen": "Alle Änderungen nachverfolgen",
+    "containerworkerdatenbank": "Container, Worker, Datenbank",
+    "apiundpluginfehler": "API- und Plugin-Fehler"
+  },
+  "logsPlaceholder": {
+    "dieseseitewirdgeradeerstelltwählen": "Diese Seite wird gerade erstellt. Wählen Sie ein Thema aus dem Menü links."
+  },
+  "index": {
+    "seitewirdgeladen": "Seite wird geladen"
   }
 }
diff --git a/frontend/src/pages/AISettings.tsx b/frontend/src/pages/AISettings.tsx
index 83706cf..52c0c35 100644
--- a/frontend/src/pages/AISettings.tsx
+++ b/frontend/src/pages/AISettings.tsx
@@ -39,6 +39,7 @@ function ProviderTab() {
   };
 
   const handleDelete = async (id: string) => {
+    const { t } = useTranslation();
     if (!confirm(t('aiSettings.confirmDeleteProvider'))) return;
     try { await deleteProvider(id); await load(); } catch (e: unknown) { const errObj = asError(e); setError(errObj?.message || null); }
   };
@@ -60,7 +61,7 @@ function ProviderTab() {
               <option value="openai">OpenAI</option>
               <option value="anthropic">Anthropic</option>
               <option value="ollama">Ollama</option>
-              <option value="azure">Azure OpenAI</option>
+              <option value="azure">{t('aISettings.azureopenai')}</option>
               <option value="huggingface">HuggingFace</option>
               <option value="custom">Custom</option>
             </select>
@@ -134,24 +135,24 @@ function PresetTab() {
   return (
     <div className="space-y-4">
       <div className="flex justify-between items-center">
-        <h2 className="text-lg font-semibold">Modelle & Presets</h2>
+        <h2 className="text-lg font-semibold">{t('aISettings.modellepresets')}</h2>
         <button onClick={() => { setShowForm(!showForm); setEditId(null); setForm({ name: '', model_id: '', provider_id: '', temperature: 0.7, max_tokens: 2048, top_p: 1.0, system_prompt: '' }); }} className="px-3 py-1.5 text-sm bg-primary-600 text-white rounded-lg">{t('aiSettings.add')} </button>
       </div>
       {error && <div className="text-sm text-red-600">{typeof error === "string" ? error : (error as any)?.message || "t('common.errorOccurred')"}</div>}
       {showForm && (
         <div className="border border-secondary-200 rounded-lg p-4 space-y-3 bg-secondary-50">
           <div className="grid grid-cols-2 gap-3">
-            <input placeholder="Preset Name" value={form.name} onChange={(e) => setForm({ ...form, name: e.target.value })} className="border rounded-lg px-3 py-2 text-sm" />
-            <input placeholder="Modell ID (z.B. gpt-4o-mini)" value={form.model_id} onChange={(e) => setForm({ ...form, model_id: e.target.value })} className="border rounded-lg px-3 py-2 text-sm" />
+            <input placeholder={t('aISettings.presetname')} value={form.name} onChange={(e) => setForm({ ...form, name: e.target.value })} className="border rounded-lg px-3 py-2 text-sm" />
+            <input placeholder={t('aISettings.modellidzbgpt4o')} value={form.model_id} onChange={(e) => setForm({ ...form, model_id: e.target.value })} className="border rounded-lg px-3 py-2 text-sm" />
             <select value={form.provider_id} onChange={(e) => setForm({ ...form, provider_id: e.target.value })} className="border rounded-lg px-3 py-2 text-sm">
-              <option value="">Anbieter wählen...</option>
+              <option value="">{t('aISettings.anbieterwählen')}</option>
               {providers.map((p) => <option key={p.id} value={p.id}>{p.name}</option>)}
             </select>
-            <input type="number" step="0.1" min="0" max="2" placeholder="Temperature" value={form.temperature} onChange={(e) => setForm({ ...form, temperature: parseFloat(e.target.value) })} className="border rounded-lg px-3 py-2 text-sm" />
-            <input type="number" placeholder="Max Tokens" value={form.max_tokens} onChange={(e) => setForm({ ...form, max_tokens: parseInt(e.target.value) })} className="border rounded-lg px-3 py-2 text-sm" />
-            <input type="number" step="0.1" min="0" max="1" placeholder="Top P" value={form.top_p} onChange={(e) => setForm({ ...form, top_p: parseFloat(e.target.value) })} className="border rounded-lg px-3 py-2 text-sm" />
+            <input type="number" step="0.1" min="0" max="2" placeholder={t('aISettings.temperature')} value={form.temperature} onChange={(e) => setForm({ ...form, temperature: parseFloat(e.target.value) })} className="border rounded-lg px-3 py-2 text-sm" />
+            <input type="number" placeholder={t('aISettings.maxtokens')} value={form.max_tokens} onChange={(e) => setForm({ ...form, max_tokens: parseInt(e.target.value) })} className="border rounded-lg px-3 py-2 text-sm" />
+            <input type="number" step="0.1" min="0" max="1" placeholder={t('aISettings.topp')} value={form.top_p} onChange={(e) => setForm({ ...form, top_p: parseFloat(e.target.value) })} className="border rounded-lg px-3 py-2 text-sm" />
           </div>
-          <textarea placeholder="System Prompt (optional)" value={form.system_prompt} onChange={(e) => setForm({ ...form, system_prompt: e.target.value })} rows={3} className="w-full border rounded-lg px-3 py-2 text-sm" />
+          <textarea placeholder={t('aISettings.systempromptoptional')} value={form.system_prompt} onChange={(e) => setForm({ ...form, system_prompt: e.target.value })} rows={3} className="w-full border rounded-lg px-3 py-2 text-sm" />
           <div className="flex gap-2">
             <button onClick={handleSave} className="px-3 py-1.5 text-sm bg-primary-600 text-white rounded-lg">{t('aiSettings.save')} </button>
             <button onClick={() => setShowForm(false)} className="px-3 py-1.5 text-sm border rounded-lg">{t('aiSettings.cancel')} </button>
@@ -163,7 +164,7 @@ function PresetTab() {
           <div key={p.id} className="border border-secondary-200 rounded-lg p-3 flex items-center justify-between">
             <div>
               <div className="font-medium text-sm">{p.name}</div>
-              <div className="text-xs text-secondary-500">{p.model_id} · temp={p.temperature} · max_tokens={p.max_tokens}</div>
+              <div className="text-xs text-secondary-500">{p.model_id} {t('aISettings.temp')}{p.temperature} {t('aISettings.maxtokens2')}{p.max_tokens}</div>
             </div>
             <div className="flex gap-2">
               <button onClick={() => handleEdit(p)} className="text-sm text-primary-600 hover:underline">{t('aiSettings.edit')} </button>
@@ -213,6 +214,7 @@ function AgentTab() {
   };
 
   const toggleTool = (toolName: string) => {
+    const { t } = useTranslation();
     setForm((prev) => ({
       ...prev,
       tool_ids: prev.tool_ids.includes(toolName)
@@ -234,13 +236,13 @@ function AgentTab() {
         <div className="border border-secondary-200 rounded-lg p-4 space-y-3 bg-secondary-50">
           <div className="grid grid-cols-2 gap-3">
             <input placeholder={t('aiSettings.name')} value={form.name} onChange={(e) => setForm({ ...form, name: e.target.value })} className="border rounded-lg px-3 py-2 text-sm" />
-            <input placeholder="Beschreibung" value={form.description} onChange={(e) => setForm({ ...form, description: e.target.value })} className="border rounded-lg px-3 py-2 text-sm" />
+            <input placeholder={t('aISettings.beschreibung')} value={form.description} onChange={(e) => setForm({ ...form, description: e.target.value })} className="border rounded-lg px-3 py-2 text-sm" />
           </div>
           <select value={form.preset_id} onChange={(e) => setForm({ ...form, preset_id: e.target.value })} className="w-full border rounded-lg px-3 py-2 text-sm">
-            <option value="">Preset wählen...</option>
+            <option value="">{t('aISettings.presetwählen')}</option>
             {presets.map((p) => <option key={p.id} value={p.id}>{p.name} ({p.model_id})</option>)}
           </select>
-          <textarea placeholder="System Prompt" value={form.system_prompt} onChange={(e) => setForm({ ...form, system_prompt: e.target.value })} rows={4} className="w-full border rounded-lg px-3 py-2 text-sm" />
+          <textarea placeholder={t('aISettings.systemprompt')} value={form.system_prompt} onChange={(e) => setForm({ ...form, system_prompt: e.target.value })} rows={4} className="w-full border rounded-lg px-3 py-2 text-sm" />
           {tools.length > 0 && (
             <div>
               <div className="text-sm font-medium mb-2">Tools:</div>
@@ -294,11 +296,11 @@ function ToolsTab() {
 
   return (
     <div className="space-y-4">
-      <h2 className="text-lg font-semibold">Verfügbare Tools</h2>
-      <p className="text-sm text-secondary-500">Diese Tools werden von Plugins bereitgestellt und können Agenten zugewiesen werden.</p>
+      <h2 className="text-lg font-semibold">{t('aISettings.verfügbaretools')}</h2>
+      <p className="text-sm text-secondary-500">{t('aISettings.diesetoolswerdenvonpluginsbereitgestellt')}</p>
       {error && <div className="text-sm text-red-600">{typeof error === "string" ? error : (error as any)?.message || "t('common.errorOccurred')"}</div>}
       {tools.length === 0 ? (
-        <div className="text-sm text-secondary-400 py-8 text-center">Keine Tools verfügbar. Plugins können Tools registrieren.</div>
+        <div className="text-sm text-secondary-400 py-8 text-center">{t('aISettings.keinetoolsverfügbarpluginskönnentools')}</div>
       ) : (
         <div className="space-y-2">
           {tools.map((tool) => (
@@ -322,6 +324,7 @@ function ToolsTab() {
 
 // ─── Main Settings Page ───
 export function AISettingsPage() {
+  const { t } = useTranslation();
   const tabs = [
     { key: 'providers', label: 'Anbieter', content: <ProviderTab /> },
     { key: 'presets', label: 'Modelle & Presets', content: <PresetTab /> },
@@ -331,7 +334,7 @@ export function AISettingsPage() {
 
   return (
     <div className="max-w-4xl">
-      <h1 className="text-2xl font-bold text-secondary-900 mb-6">KI Assistent Einstellungen</h1>
+      <h1 className="text-2xl font-bold text-secondary-900 mb-6">{t('aISettings.kiassistenteinstellungen')}</h1>
       <Tabs tabs={tabs} />
     </div>
   );
diff --git a/frontend/src/pages/AgentDashboard.tsx b/frontend/src/pages/AgentDashboard.tsx
index b34baeb..ee87f7b 100644
--- a/frontend/src/pages/AgentDashboard.tsx
+++ b/frontend/src/pages/AgentDashboard.tsx
@@ -184,7 +184,7 @@ function AgentForm({
             onChange={(e) => updateField('name', e.target.value)}
             required
             className="w-full rounded-lg border border-secondary-300 px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-primary-500"
-            placeholder="My Agent"
+            placeholder={t('agentDashboard.myagent')}
           />
         </div>
         <div>
@@ -196,7 +196,7 @@ function AgentForm({
             onChange={(e) => updateField('description', e.target.value)}
             rows={2}
             className="w-full rounded-lg border border-secondary-300 px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-primary-500"
-            placeholder="Optional description"
+            placeholder={t('agentDashboard.optionaldescription')}
           />
         </div>
       </div>
@@ -213,7 +213,7 @@ function AgentForm({
             onChange={(e) => updateField('model', e.target.value)}
             list="model-suggestions"
             className="flex-1 rounded-lg border border-secondary-300 px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-primary-500"
-            placeholder="gpt-4"
+            placeholder={t('agentDashboard.gpt4')}
           />
           <datalist id="model-suggestions">
             {commonModels.map((m) => (
@@ -233,7 +233,7 @@ function AgentForm({
           onChange={(e) => updateField('system_prompt', e.target.value)}
           rows={4}
           className="w-full rounded-lg border border-secondary-300 px-3 py-2 text-sm font-mono focus:outline-none focus:ring-2 focus:ring-primary-500"
-          placeholder="You are a helpful assistant..."
+          placeholder={t('agentDashboard.youareahelpfulassistant')}
         />
       </div>
 
diff --git a/frontend/src/pages/Agents.tsx b/frontend/src/pages/Agents.tsx
index 01032fb..1cdfe45 100644
--- a/frontend/src/pages/Agents.tsx
+++ b/frontend/src/pages/Agents.tsx
@@ -2,6 +2,7 @@ import React, { useState } from 'react';
 import { NavLink, Outlet } from 'react-router-dom';
 import { useUIStore } from '@/store/uiStore';
 import { ChevronRight, ChevronDown, Bot, Zap, Brain, Cpu, Settings2, Activity, MessageSquare, ArrowLeft } from 'lucide-react';
+import { useTranslation } from 'react-i18next';
 
 interface AgentNode {
   title: string;
@@ -23,6 +24,7 @@ const AGENT_TREE: AgentNode[] = [
 ];
 
 function TreeItem({ node, depth }: { node: AgentNode; depth: number }) {
+  const { t } = useTranslation();
   const [expanded, setExpanded] = useState(depth < 1);
   const hasChildren = node.children && node.children.length > 0;
   const paddingLeft = depth * 16 + 12;
@@ -70,6 +72,7 @@ function TreeItem({ node, depth }: { node: AgentNode; depth: number }) {
 }
 
 export function AgentsPage() {
+  const { t } = useTranslation();
   const sidebarOpen = useUIStore((state) => state.sidebarOpen);
 
   return (
@@ -80,14 +83,14 @@ export function AgentsPage() {
             <button
               onClick={() => window.location.href = '/start'}
               className="p-1.5 rounded-md text-secondary-400 hover:bg-secondary-100 hover:text-secondary-700 flex items-center justify-center focus:outline-none"
-              aria-label="Zurück zur Startseite"
-              title="Zurück zur Startseite"
+              aria-label={t('agents.zurückzurstartseite')}
+              title={t('agents.zurückzurstartseite')}
             >
               <ArrowLeft className="w-4 h-4" />
             </button>
             <h1 className="text-xl font-bold text-secondary-900">Agenten</h1>
           </div>
-          <nav className="space-y-0.5 overflow-y-auto" role="navigation" aria-label="Agenten Navigation">
+          <nav className="space-y-0.5 overflow-y-auto" role="navigation" aria-label={t('agents.agentennavigation')}>
             {AGENT_TREE.map((node) => (
               <TreeItem key={node.title} node={node} depth={0} />
             ))}
diff --git a/frontend/src/pages/AuditLog.tsx b/frontend/src/pages/AuditLog.tsx
index 1d5c58d..47d6eda 100644
--- a/frontend/src/pages/AuditLog.tsx
+++ b/frontend/src/pages/AuditLog.tsx
@@ -115,19 +115,19 @@ export function AuditLogPage() {
             label={t('auditLog.user')}
             value={filterUser}
             onChange={(e) => setFilterUser(e.target.value)}
-            placeholder="anna.schmidt"
+            placeholder={t('auditLog.annaschmidt')}
           />
           <Input
             label={t('auditLog.action')}
             value={filterAction}
             onChange={(e) => setFilterAction(e.target.value)}
-            placeholder="create, update, delete"
+            placeholder={t('auditLog.createupdatedelete')}
           />
           <Input
             label={t('auditLog.entity')}
             value={filterEntity}
             onChange={(e) => setFilterEntity(e.target.value)}
-            placeholder="company, contact"
+            placeholder={t('auditLog.companycontact')}
           />
           <Input
             label={t('auditLog.dateFrom')}
diff --git a/frontend/src/pages/Automation.tsx b/frontend/src/pages/Automation.tsx
index 195ea9d..f8177cd 100644
--- a/frontend/src/pages/Automation.tsx
+++ b/frontend/src/pages/Automation.tsx
@@ -2,6 +2,7 @@ import React, { useState } from 'react';
 import { NavLink, Outlet } from 'react-router-dom';
 import { useUIStore } from '@/store/uiStore';
 import { ChevronRight, ChevronDown, Zap, Play, History, GitBranch, Settings2, Activity, Clock, ArrowLeft } from 'lucide-react';
+import { useTranslation } from 'react-i18next';
 
 interface AutomationNode {
   title: string;
@@ -32,6 +33,7 @@ const AUTOMATION_TREE: AutomationNode[] = [
 ];
 
 function TreeItem({ node, depth }: { node: AutomationNode; depth: number }) {
+  const { t } = useTranslation();
   const [expanded, setExpanded] = useState(depth < 1);
   const hasChildren = node.children && node.children.length > 0;
   const paddingLeft = depth * 16 + 12;
@@ -79,6 +81,7 @@ function TreeItem({ node, depth }: { node: AutomationNode; depth: number }) {
 }
 
 export function AutomationPage() {
+  const { t } = useTranslation();
   const sidebarOpen = useUIStore((state) => state.sidebarOpen);
 
   return (
@@ -89,14 +92,14 @@ export function AutomationPage() {
             <button
               onClick={() => window.location.href = '/start'}
               className="p-1.5 rounded-md text-secondary-400 hover:bg-secondary-100 hover:text-secondary-700 flex items-center justify-center focus:outline-none"
-              aria-label="Zurück zur Startseite"
-              title="Zurück zur Startseite"
+              aria-label={t('automation.zurückzurstartseite')}
+              title={t('automation.zurückzurstartseite')}
             >
               <ArrowLeft className="w-4 h-4" />
             </button>
             <h1 className="text-xl font-bold text-secondary-900">Automation</h1>
           </div>
-          <nav className="space-y-0.5 overflow-y-auto" role="navigation" aria-label="Automation Navigation">
+          <nav className="space-y-0.5 overflow-y-auto" role="navigation" aria-label={t('automation.automationnavigation')}>
             {AUTOMATION_TREE.map((node) => (
               <TreeItem key={node.title} node={node} depth={0} />
             ))}
diff --git a/frontend/src/pages/AutomationDashboard.tsx b/frontend/src/pages/AutomationDashboard.tsx
index 277e7bd..adbd375 100644
--- a/frontend/src/pages/AutomationDashboard.tsx
+++ b/frontend/src/pages/AutomationDashboard.tsx
@@ -215,7 +215,7 @@ function AutomationForm({
             onChange={(e) => updateField('name', e.target.value)}
             required
             className="w-full rounded-lg border border-secondary-300 px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-primary-500"
-            placeholder="My Automation"
+            placeholder={t('automationDashboard.myautomation')}
           />
         </div>
         <div>
@@ -227,7 +227,7 @@ function AutomationForm({
             onChange={(e) => updateField('description', e.target.value)}
             rows={2}
             className="w-full rounded-lg border border-secondary-300 px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-primary-500"
-            placeholder="Optional description"
+            placeholder={t('automationDashboard.optionaldescription')}
           />
         </div>
       </div>
@@ -255,7 +255,7 @@ function AutomationForm({
             value={form.trigger_config.event_name || ''}
             onChange={(e) => updateField('trigger_config', { ...form.trigger_config, event_name: e.target.value })}
             className="w-full rounded-lg border border-secondary-300 px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-primary-500"
-            placeholder="contact.created"
+            placeholder={t('automationDashboard.contactcreated')}
           />
         </div>
       )}
@@ -271,7 +271,7 @@ function AutomationForm({
             className="w-full rounded-lg border border-secondary-300 px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-primary-500"
             placeholder="0 9 * * *"
           />
-          <p className="text-xs text-secondary-400 mt-1">Cron expression (e.g. 0 9 * * * for daily at 9am)</p>
+          <p className="text-xs text-secondary-400 mt-1">{t('automationDashboard.cronexpressioneg09')}</p>
         </div>
       )}
 
@@ -294,7 +294,7 @@ function AutomationForm({
               type="text"
               value={cond.field}
               onChange={(e) => updateCondition(i, 'field', e.target.value)}
-              placeholder="Field"
+              placeholder={t('automationDashboard.field')}
               className="flex-1 rounded-lg border border-secondary-300 px-3 py-1.5 text-sm focus:outline-none focus:ring-2 focus:ring-primary-500"
             />
             <Select
@@ -307,14 +307,14 @@ function AutomationForm({
               type="text"
               value={cond.value}
               onChange={(e) => updateCondition(i, 'value', e.target.value)}
-              placeholder="Value"
+              placeholder={t('automationDashboard.value')}
               className="flex-1 rounded-lg border border-secondary-300 px-3 py-1.5 text-sm focus:outline-none focus:ring-2 focus:ring-primary-500"
             />
             <button
               type="button"
               onClick={() => removeCondition(i)}
               className="text-danger-500 hover:text-danger-700 p-1"
-              aria-label="Remove condition"
+              aria-label={t('automationDashboard.removecondition')}
             >
               <XCircle className="h-4 w-4" />
             </button>
@@ -353,14 +353,14 @@ function AutomationForm({
                   // ignore invalid JSON while typing
                 }
               }}
-              placeholder='{"url": "..."}'
+              placeholder={t('automationDashboard.url')}
               className="flex-1 rounded-lg border border-secondary-300 px-3 py-1.5 text-sm font-mono focus:outline-none focus:ring-2 focus:ring-primary-500"
             />
             <button
               type="button"
               onClick={() => removeAction(i)}
               className="text-danger-500 hover:text-danger-700 p-1"
-              aria-label="Remove action"
+              aria-label={t('automationDashboard.removeaction')}
             >
               <XCircle className="h-4 w-4" />
             </button>
diff --git a/frontend/src/pages/AutomationSettings.tsx b/frontend/src/pages/AutomationSettings.tsx
index fc99b10..cd93fcb 100644
--- a/frontend/src/pages/AutomationSettings.tsx
+++ b/frontend/src/pages/AutomationSettings.tsx
@@ -148,7 +148,7 @@ export function AutomationSettingsPage() {
                 value={form.default_llm_model}
                 onChange={(e) => updateField('default_llm_model', e.target.value)}
                 className="w-full rounded-lg border border-secondary-300 px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-primary-500"
-                placeholder="gpt-4"
+                placeholder={t('automationSettings.gpt4')}
               />
               <p className="text-xs text-secondary-400 mt-1">{t('automation.defaultLlmModelHint')}</p>
             </div>
@@ -272,7 +272,7 @@ export function AutomationSettingsPage() {
               value={miniAppForm.app_id}
               onChange={(e) => setMiniAppForm({ ...miniAppForm, app_id: e.target.value })}
               className="w-full rounded-lg border border-secondary-300 px-3 py-2 text-sm"
-              placeholder="my_custom_app"
+              placeholder={t('automationSettings.mycustomapp')}
             />
           </div>
           <div>
@@ -282,7 +282,7 @@ export function AutomationSettingsPage() {
               value={miniAppForm.name}
               onChange={(e) => setMiniAppForm({ ...miniAppForm, name: e.target.value })}
               className="w-full rounded-lg border border-secondary-300 px-3 py-2 text-sm"
-              placeholder="My Custom App"
+              placeholder={t('automationSettings.mycustomapp2')}
             />
           </div>
           <div>
@@ -292,7 +292,7 @@ export function AutomationSettingsPage() {
               value={miniAppForm.icon}
               onChange={(e) => setMiniAppForm({ ...miniAppForm, icon: e.target.value })}
               className="w-full rounded-lg border border-secondary-300 px-3 py-2 text-sm"
-              placeholder="AppWindow"
+              placeholder={t('automationSettings.appwindow')}
             />
           </div>
           <div>
@@ -302,7 +302,7 @@ export function AutomationSettingsPage() {
               onChange={(e) => setMiniAppForm({ ...miniAppForm, description: e.target.value })}
               rows={2}
               className="w-full rounded-lg border border-secondary-300 px-3 py-2 text-sm"
-              placeholder="Optional description"
+              placeholder={t('automationSettings.optionaldescription')}
             />
           </div>
           <div>
@@ -312,7 +312,7 @@ export function AutomationSettingsPage() {
               onChange={(e) => setMiniAppForm({ ...miniAppForm, render_schema: e.target.value })}
               rows={4}
               className="w-full rounded-lg border border-secondary-300 px-3 py-2 text-sm font-mono"
-              placeholder='{"type": "form", "fields": []}'
+              placeholder={t('automationSettings.typeformfields')}
             />
           </div>
           <div className="flex justify-end gap-3 pt-4 border-t border-secondary-200">
diff --git a/frontend/src/pages/Communication.tsx b/frontend/src/pages/Communication.tsx
index 56111b6..8ca185d 100644
--- a/frontend/src/pages/Communication.tsx
+++ b/frontend/src/pages/Communication.tsx
@@ -12,6 +12,7 @@ import { ResizablePanel } from '@/components/ui/ResizablePanel';
 import { usePluginToolbarStore } from '@/store/pluginToolbarStore';
 import { apiClient } from '@/api/client';
 import { streamChat, fetchAgents, fetchMessages as fetchAiMessages, type AIAgent } from '@/api/ai';
+import { useTranslation } from 'react-i18next';
 
 // ─── Types ───
 
@@ -216,6 +217,7 @@ interface ConversationTreeProps {
 }
 
 function ConversationTree({ conversations, activeConvId, onSelect, onNewChat, loading }: ConversationTreeProps) {
+  const { t } = useTranslation();
   const [expanded, setExpanded] = useState<Record<ConversationCategory, boolean>>({
     system: true,
     ai: true,
@@ -293,7 +295,7 @@ function ConversationTree({ conversations, activeConvId, onSelect, onNewChat, lo
               </button>
             ))}
             {expanded[section.category] && section.conversations.length === 0 && (
-              <div className="px-6 py-2 text-xs text-secondary-400">Keine Konversationen</div>
+              <div className="px-6 py-2 text-xs text-secondary-400">{t('communication.keinekonversationen')}</div>
             )}
           </div>
         ))}
@@ -311,6 +313,7 @@ interface ChatWindowProps {
 }
 
 function ChatWindow({ convId, category, onBack }: ChatWindowProps) {
+  const { t } = useTranslation();
   const [messages, setMessages] = useState<Message[]>([]);
   const [input, setInput] = useState('');
   const [loading, setLoading] = useState(true);
@@ -499,11 +502,11 @@ function ChatWindow({ convId, category, onBack }: ChatWindowProps) {
         <button
           onClick={() => setShowMiniApps(!showMiniApps)}
           className="p-1 hover:bg-secondary-100 rounded"
-          title="Mini-Apps"
+          title={t('communication.miniapps')}
         >
           <Sparkles className="w-4 h-4 text-secondary-400" />
         </button>
-        <button className="p-1 hover:bg-secondary-100 rounded" title="In neuem Fenster">
+        <button className="p-1 hover:bg-secondary-100 rounded" title={t('communication.inneuemfenster')}>
           <ExternalLink className="w-4 h-4 text-secondary-400" />
         </button>
       </div>
@@ -537,7 +540,7 @@ function ChatWindow({ convId, category, onBack }: ChatWindowProps) {
         {!loading && messages.length === 0 && !aiStreaming && (
           <div className="text-center text-secondary-400 py-8">
             <MessageSquare className="w-10 h-10 mx-auto mb-2 opacity-50" />
-            <p className="text-sm">Keine Nachrichten. Schreibe die erste!</p>
+            <p className="text-sm">{t('communication.keinenachrichtenschreibedieerste')}</p>
           </div>
         )}
         {messages.map(msg => (
@@ -549,7 +552,7 @@ function ChatWindow({ convId, category, onBack }: ChatWindowProps) {
               <Bot className="w-4 h-4 text-primary-600" />
             </div>
             <div className="flex-1">
-              <div className="text-xs text-secondary-500 mb-1">KI antwortet...</div>
+              <div className="text-xs text-secondary-500 mb-1">{t('communication.kiantwortet')}</div>
               <div className="ai-markdown max-w-none break-words">
                 <ReactMarkdown remarkPlugins={[remarkGfm]}>{streamingContent || '...'}</ReactMarkdown>
               </div>
@@ -561,10 +564,10 @@ function ChatWindow({ convId, category, onBack }: ChatWindowProps) {
       {/* Input */}
       <div className="border-t border-secondary-200 p-3">
         <div className="flex items-end gap-2">
-          <button className="p-2 hover:bg-secondary-100 rounded-lg" title="Datei anhängen">
+          <button className="p-2 hover:bg-secondary-100 rounded-lg" title={t('communication.dateianhängen')}>
             <Paperclip className="w-4 h-4 text-secondary-400" />
           </button>
-          <button className="p-2 hover:bg-secondary-100 rounded-lg" title="Emoji">
+          <button className="p-2 hover:bg-secondary-100 rounded-lg" title={t('communication.emoji')}>
             <Smile className="w-4 h-4 text-secondary-400" />
           </button>
           <textarea
@@ -667,6 +670,7 @@ interface NewChatDialogProps {
 }
 
 function NewChatDialog({ category, onClose, onCreate }: NewChatDialogProps) {
+  const { t } = useTranslation();
   const [title, setTitle] = useState('');
   const [users, setUsers] = useState<{id: string; name: string; email: string}[]>([]);
   const [selectedUsers, setSelectedUsers] = useState<string[]>([]);
@@ -707,7 +711,7 @@ function NewChatDialog({ category, onClose, onCreate }: NewChatDialogProps) {
           />
           {category === 'colleague' && (
             <div>
-              <label className="text-sm font-medium text-secondary-700 mb-1 block">Teilnehmer auswählen</label>
+              <label className="text-sm font-medium text-secondary-700 mb-1 block">{t('communication.teilnehmerauswählen')}</label>
               {loading ? (
                 <Loader2 className="w-4 h-4 animate-spin" />
               ) : (
@@ -745,6 +749,7 @@ function NewChatDialog({ category, onClose, onCreate }: NewChatDialogProps) {
 // ─── Main Page ───
 
 export function CommunicationPage() {
+  const { t } = useTranslation();
   const [conversations, setConversations] = useState<Conversation[]>([]);
   const [activeConvId, setActiveConvId] = useState<string | null>(null);
   const [loading, setLoading] = useState(true);
@@ -851,7 +856,7 @@ export function CommunicationPage() {
             <div className="flex items-center justify-center h-full text-secondary-400">
               <div className="text-center">
                 <MessageSquare className="w-12 h-12 mx-auto mb-3 opacity-50" />
-                <p>Wähle eine Konversation aus</p>
+                <p>{t('communication.wähleeinekonversationaus')}</p>
               </div>
             </div>
           )}
diff --git a/frontend/src/pages/ContactsList.tsx b/frontend/src/pages/ContactsList.tsx
index 70e7637..1f5dad5 100644
--- a/frontend/src/pages/ContactsList.tsx
+++ b/frontend/src/pages/ContactsList.tsx
@@ -537,13 +537,13 @@ export function ContactsListPage() {
                   {/* Placeholder for saved custom views */}
                   {savedViews.length === 0 ? (
                     <div className="px-2 py-3 text-center">
-                      <p className="text-[11px] text-secondary-400 mb-2">Keine benutzerdefinierten Ansichten</p>
+                      <p className="text-[11px] text-secondary-400 mb-2">{t('contactsList.keinebenutzerdefiniertenansichten')}</p>
                       <button
                         onClick={handleSaveView}
                         className="inline-flex items-center gap-1 px-2 py-1 text-[11px] text-primary-600 hover:bg-primary-50 rounded transition-colors"
                       >
                         <Plus className="w-3 h-3" />
-                        Aktuelle Ansicht speichern
+                        {t('contactsList.aktuelleansichtspeichern')}
                       </button>
                     </div>
                   ) : (
@@ -572,7 +572,7 @@ export function ContactsListPage() {
                         className="w-full flex items-center gap-1 px-2 py-1.5 rounded text-xs text-primary-600 hover:bg-primary-50 transition-colors"
                       >
                         <Plus className="w-3 h-3" />
-                        Aktuelle Ansicht speichern
+                        {t('contactsList.aktuelleansichtspeichern')}
                       </button>
                     </>
                   )}
@@ -756,7 +756,7 @@ export function ContactsListPage() {
 
       {/* Saved Filters Modal */}
       {savedFiltersOpen && (
-        <Modal open={savedFiltersOpen} onClose={() => setSavedFiltersOpen(false)} title="Gespeicherte Filter">
+        <Modal open={savedFiltersOpen} onClose={() => setSavedFiltersOpen(false)} title={t('contactsList.gespeichertefilter')}>
           <SavedFilters
             entityType="contacts"
             currentCriteria={{ search: debouncedSearch, type: contactType, sortBy, sortOrder, folderId }}
diff --git a/frontend/src/pages/CustomFields.tsx b/frontend/src/pages/CustomFields.tsx
index 3e6ae6b..cccd3cf 100644
--- a/frontend/src/pages/CustomFields.tsx
+++ b/frontend/src/pages/CustomFields.tsx
@@ -394,7 +394,7 @@ export function CustomFieldsPage() {
             required
             value={form.label}
             onChange={(e) => handleLabelChange(e.target.value)}
-            placeholder="z.B. Branche, Abteilung, Geburtsdatum"
+            placeholder={t('customFields.zbbrancheabteilunggeburtsdatum')}
           />
 
           {/* Name (auto-generated) */}
@@ -404,7 +404,7 @@ export function CustomFieldsPage() {
             value={form.name}
             onChange={(e) => handleNameChange(e.target.value)}
             helperText="Wird automatisch aus der Bezeichnung generiert"
-            placeholder="z.B. branche, abteilung, geburtsdatum"
+            placeholder={t('customFields.zbbrancheabteilunggeburtsdatum2')}
           />
 
           {/* Field type */}
@@ -423,7 +423,7 @@ export function CustomFieldsPage() {
               required
               value={form.optionsStr}
               onChange={(e) => setForm((prev) => ({ ...prev, optionsStr: e.target.value }))}
-              placeholder="Option 1, Option 2, Option 3"
+              placeholder={t('customFields.option1option2option3')}
               helperText="Trennen Sie die Optionen mit Kommas"
             />
           )}
diff --git a/frontend/src/pages/Dashboard.tsx b/frontend/src/pages/Dashboard.tsx
index f9ec6d8..8f18a24 100644
--- a/frontend/src/pages/Dashboard.tsx
+++ b/frontend/src/pages/Dashboard.tsx
@@ -121,21 +121,21 @@ export function DashboardPage() {
               <div className="border border-secondary-200 rounded-lg p-4 bg-white">
                 <div className="flex items-center gap-2 mb-2">
                   <DollarSign className="w-4 h-4 text-warning-600" />
-                  <span className="text-sm font-medium text-secondary-900">LLM Cost (24h)</span>
+                  <span className="text-sm font-medium text-secondary-900">{t('dashboard.llmcost24h')}</span>
                 </div>
                 <p className="text-2xl font-bold text-secondary-900">${systemData.llm.last_24h_cost?.toFixed(2) ?? '0.00'}</p>
               </div>
               <div className="border border-secondary-200 rounded-lg p-4 bg-white">
                 <div className="flex items-center gap-2 mb-2">
                   <TrendingUp className="w-4 h-4 text-primary-600" />
-                  <span className="text-sm font-medium text-secondary-900">LLM Tokens (24h)</span>
+                  <span className="text-sm font-medium text-secondary-900">{t('dashboard.llmtokens24h')}</span>
                 </div>
                 <p className="text-2xl font-bold text-secondary-900">{systemData.llm.last_24h_tokens?.toLocaleString() ?? '0'}</p>
               </div>
               <div className="border border-secondary-200 rounded-lg p-4 bg-white">
                 <div className="flex items-center gap-2 mb-2">
                   <Activity className="w-4 h-4 text-primary-600" />
-                  <span className="text-sm font-medium text-secondary-900">Active Plugins</span>
+                  <span className="text-sm font-medium text-secondary-900">{t('dashboard.activeplugins')}</span>
                 </div>
                 <p className="text-2xl font-bold text-secondary-900">{systemData.plugins?.active_plugins?.length ?? '—'}</p>
               </div>
diff --git a/frontend/src/pages/GuestContacts.tsx b/frontend/src/pages/GuestContacts.tsx
index b2f7c6d..25e1d02 100644
--- a/frontend/src/pages/GuestContacts.tsx
+++ b/frontend/src/pages/GuestContacts.tsx
@@ -2,8 +2,10 @@
 // Guest contacts page now redirects to normal contacts page
 import { useEffect } from 'react';
 import { useNavigate } from 'react-router-dom';
+import { useTranslation } from 'react-i18next';
 
 export function GuestContactsPage() {
+  const { t } = useTranslation();
   const navigate = useNavigate();
 
   useEffect(() => {
@@ -13,7 +15,7 @@ export function GuestContactsPage() {
 
   return (
     <div className="flex items-center justify-center min-h-screen">
-      <p className="text-gray-500">Weiterleitung zu Kontakten...</p>
+      <p className="text-gray-500">{t('guestContacts.weiterleitungzukontakten')}</p>
     </div>
   );
 }
diff --git a/frontend/src/pages/GuestLogin.tsx b/frontend/src/pages/GuestLogin.tsx
index 1467f05..62d9b3e 100644
--- a/frontend/src/pages/GuestLogin.tsx
+++ b/frontend/src/pages/GuestLogin.tsx
@@ -2,8 +2,10 @@
 // Guest login page now redirects to normal login
 import { useEffect } from 'react';
 import { useNavigate } from 'react-router-dom';
+import { useTranslation } from 'react-i18next';
 
 export function GuestLoginPage() {
+  const { t } = useTranslation();
   const navigate = useNavigate();
 
   useEffect(() => {
@@ -13,7 +15,7 @@ export function GuestLoginPage() {
 
   return (
     <div className="flex items-center justify-center min-h-screen">
-      <p className="text-gray-500">Weiterleitung zum Login...</p>
+      <p className="text-gray-500">{t('guestLogin.weiterleitungzumlogin')}</p>
     </div>
   );
 }
diff --git a/frontend/src/pages/Help.tsx b/frontend/src/pages/Help.tsx
index 2196fc4..ea08685 100644
--- a/frontend/src/pages/Help.tsx
+++ b/frontend/src/pages/Help.tsx
@@ -142,14 +142,14 @@ export function HelpPage() {
             <button
               onClick={() => window.location.href = '/start'}
               className="p-1.5 rounded-md text-secondary-400 hover:bg-secondary-100 hover:text-secondary-700 flex items-center justify-center focus:outline-none"
-              aria-label="Zurück zur Startseite"
-              title="Zurück zur Startseite"
+              aria-label={t('help.zurückzurstartseite')}
+              title={t('help.zurückzurstartseite')}
             >
               <ArrowLeft className="w-4 h-4" />
             </button>
             <h1 className="text-xl font-bold text-secondary-900">Hilfe</h1>
           </div>
-          <nav className="space-y-0.5 overflow-y-auto" role="navigation" aria-label="Hilfe Navigation">
+          <nav className="space-y-0.5 overflow-y-auto" role="navigation" aria-label={t('help.hilfenavigation')}>
             {HELP_TREE.map((node) => (
               <TreeItem key={node.title} node={node} depth={0} />
             ))}
diff --git a/frontend/src/pages/ImportExport.tsx b/frontend/src/pages/ImportExport.tsx
index 1fb824d..c2e4552 100644
--- a/frontend/src/pages/ImportExport.tsx
+++ b/frontend/src/pages/ImportExport.tsx
@@ -38,7 +38,7 @@ export function ImportExportPage() {
 
       {/* Tab navigation */}
       <div className="border-b border-secondary-200">
-        <nav className="flex gap-1" aria-label="Tabs">
+        <nav className="flex gap-1" aria-label={t('importExport.tabs')}>
           {tabs.map((tab) => (
             <button
               key={tab.key}
diff --git a/frontend/src/pages/Logs.tsx b/frontend/src/pages/Logs.tsx
index 82c9213..60677c8 100644
--- a/frontend/src/pages/Logs.tsx
+++ b/frontend/src/pages/Logs.tsx
@@ -2,6 +2,7 @@ import React, { useState } from 'react';
 import { NavLink, Outlet } from 'react-router-dom';
 import { useUIStore } from '@/store/uiStore';
 import { ChevronRight, ChevronDown, ScrollText, FileText, AlertTriangle, ArrowLeft } from 'lucide-react';
+import { useTranslation } from 'react-i18next';
 
 interface LogNode {
   title: string;
@@ -40,6 +41,7 @@ const LOG_TREE: LogNode[] = [
 ];
 
 function TreeItem({ node, depth }: { node: LogNode; depth: number }) {
+  const { t } = useTranslation();
   const [expanded, setExpanded] = useState(depth < 1);
   const hasChildren = node.children && node.children.length > 0;
   const paddingLeft = depth * 16 + 12;
@@ -87,6 +89,7 @@ function TreeItem({ node, depth }: { node: LogNode; depth: number }) {
 }
 
 export function LogsPage() {
+  const { t } = useTranslation();
   const sidebarOpen = useUIStore((state) => state.sidebarOpen);
 
   return (
@@ -97,14 +100,14 @@ export function LogsPage() {
             <button
               onClick={() => window.location.href = '/start'}
               className="p-1.5 rounded-md text-secondary-400 hover:bg-secondary-100 hover:text-secondary-700 flex items-center justify-center focus:outline-none"
-              aria-label="Zurück zur Startseite"
-              title="Zurück zur Startseite"
+              aria-label={t('logs.zurückzurstartseite')}
+              title={t('logs.zurückzurstartseite')}
             >
               <ArrowLeft className="w-4 h-4" />
             </button>
             <h1 className="text-xl font-bold text-secondary-900">Logs</h1>
           </div>
-          <nav className="space-y-0.5 overflow-y-auto" role="navigation" aria-label="Logs Navigation">
+          <nav className="space-y-0.5 overflow-y-auto" role="navigation" aria-label={t('logs.logsnavigation')}>
             {LOG_TREE.map((node) => (
               <TreeItem key={node.title} node={node} depth={0} />
             ))}
diff --git a/frontend/src/pages/Mail.tsx b/frontend/src/pages/Mail.tsx
index 414a7af..160a40c 100644
--- a/frontend/src/pages/Mail.tsx
+++ b/frontend/src/pages/Mail.tsx
@@ -970,7 +970,7 @@ export function MailPage() {
               <button
                 onClick={() => setActiveView('folders')}
                 className="inline-flex items-center gap-1 px-2 py-1 rounded text-sm text-secondary-700 hover:bg-secondary-100 min-h-touch"
-                aria-label="Zurück zu Ordnern"
+                aria-label={t('mail.zurückzuordnern')}
                 data-testid="mobile-back-to-folders"
               >
                 <ChevronLeft className="w-4 h-4" aria-hidden="true" strokeWidth={2} />
@@ -1003,7 +1003,7 @@ export function MailPage() {
               <button
                 onClick={() => setActiveView('list')}
                 className="inline-flex items-center gap-1 px-2 py-1 rounded text-sm text-secondary-700 hover:bg-secondary-100 min-h-touch"
-                aria-label="Zurück zur Liste"
+                aria-label={t('mail.zurückzurliste')}
                 data-testid="mobile-back-to-list"
               >
                 <ChevronLeft className="w-4 h-4" aria-hidden="true" strokeWidth={2} />
diff --git a/frontend/src/pages/MailSettings.tsx b/frontend/src/pages/MailSettings.tsx
index a6a0094..ea764da 100644
--- a/frontend/src/pages/MailSettings.tsx
+++ b/frontend/src/pages/MailSettings.tsx
@@ -221,25 +221,25 @@ export function MailSettingsPage() {
                   label={t('mail.email')}
                   {...registerAccount('email')}
                   error={accountErrors.email?.message === 'required' ? t('validation.required') : accountErrors.email?.message === 'invalidEmail' ? t('validation.email') : undefined}
-                  placeholder="user@example.com"
+                  placeholder={t('mailSettings.userexamplecom')}
                   required
                 />
                 <Input
                   label={t('mail.displayName')}
                   {...registerAccount('display_name')}
-                  placeholder="John Doe"
+                  placeholder={t('mailSettings.johndoe')}
                 />
                 <Input
                   label="Benutzername (IMAP/SMTP)"
                   {...registerAccount('username')}
-                  placeholder="Leer lassen für E-Mail-Adresse"
+                  placeholder={t('mailSettings.leerlassenfüremailadresse')}
                 />
                 <div className="grid grid-cols-2 gap-3">
                   <Input
                     label={t('mail.imapHost')}
                     {...registerAccount('imap_host')}
                     error={accountErrors.imap_host?.message === 'required' ? t('validation.required') : undefined}
-                    placeholder="imap.example.com"
+                    placeholder={t('mailSettings.imapexamplecom')}
                   />
                   <Input
                     label={t('mail.imapPort')}
@@ -253,7 +253,7 @@ export function MailSettingsPage() {
                     label={t('mail.smtpHost')}
                     {...registerAccount('smtp_host')}
                     error={accountErrors.smtp_host?.message === 'required' ? t('validation.required') : undefined}
-                    placeholder="smtp.example.com"
+                    placeholder={t('mailSettings.smtpexamplecom')}
                   />
                   <Input
                     label={t('mail.smtpPort')}
@@ -275,7 +275,7 @@ export function MailSettingsPage() {
                     {...registerAccount('is_shared')}
                     className="rounded"
                   />
-                  Geteiltes Postfach (für alle Tenant-Benutzer sichtbar)
+                  {t('mailSettings.geteiltespostfachfüralletenantbenutzer')}
                 </label>
                 <div className="flex gap-2">
                   <Button type="submit" isLoading={accountSubmitting} size="sm">{t('common.save')}</Button>
@@ -392,7 +392,7 @@ export function MailSettingsPage() {
                         className="text-xs text-secondary-400 hover:text-secondary-600"
                         data-testid={`folder-mapping-btn-${acc.id}`}
                       >
-                        Ordner-Zuordnung bearbeiten
+                        {t('mailSettings.ordnerzuordnungbearbeiten')}
                       </button>
                     </div>
                   )}
diff --git a/frontend/src/pages/NoAccessPage.tsx b/frontend/src/pages/NoAccessPage.tsx
index 987cc17..edd113f 100644
--- a/frontend/src/pages/NoAccessPage.tsx
+++ b/frontend/src/pages/NoAccessPage.tsx
@@ -1,21 +1,22 @@
 import React from 'react';
 import { Link } from 'react-router-dom';
 import { ShieldX } from 'lucide-react';
+import { useTranslation } from 'react-i18next';
 
 export function NoAccessPage() {
+  const { t } = useTranslation();
   return (
     <div className="flex flex-col items-center justify-center min-h-screen bg-secondary-50 p-4">
       <ShieldX className="w-16 h-16 text-secondary-400 mb-4" strokeWidth={1.5} />
-      <h1 className="text-2xl font-bold text-secondary-700 mb-2">Kein Zugriff</h1>
+      <h1 className="text-2xl font-bold text-secondary-700 mb-2">{t('noAccessPage.keinzugriff')}</h1>
       <p className="text-secondary-500 mb-6 text-center max-w-md">
-        Sie haben keine Berechtigung, auf diese Seite zuzugreifen.
-        Bitte wenden Sie sich an einen Administrator, falls Sie Zugriff benötigen.
+        {t('noAccessPage.siehabenkeineberechtigungaufdiese')}
       </p>
       <Link
         to="/dashboard"
         className="px-4 py-2 bg-primary-600 text-white rounded-md hover:bg-primary-700 transition-colors"
       >
-        Zum Dashboard
+        {t('noAccessPage.zumdashboard')}
       </Link>
     </div>
   );
diff --git a/frontend/src/pages/Reports.tsx b/frontend/src/pages/Reports.tsx
index c815a9e..dc21f11 100644
--- a/frontend/src/pages/Reports.tsx
+++ b/frontend/src/pages/Reports.tsx
@@ -397,7 +397,7 @@ export function ReportsPage() {
               <textarea
                 value={jsonData}
                 onChange={(e) => setJsonData(e.target.value)}
-                placeholder='{"key": "value"}'
+                placeholder={t('reports.keyvalue')}
                 className="w-full text-xs font-mono border border-secondary-300 rounded px-2 py-1.5 h-40 resize-none"
                 spellCheck={false}
                 data-testid="textarea-json-data"
diff --git a/frontend/src/pages/Settings.tsx b/frontend/src/pages/Settings.tsx
index 269a859..fbfde0b 100644
--- a/frontend/src/pages/Settings.tsx
+++ b/frontend/src/pages/Settings.tsx
@@ -74,8 +74,8 @@ export function SettingsPage() {
             <button
               onClick={() => window.location.href = '/start'}
               className="p-1.5 rounded-md text-secondary-400 hover:bg-secondary-100 hover:text-secondary-700 flex items-center justify-center focus:outline-none"
-              aria-label="Zurück zur Startseite"
-              title="Zurück zur Startseite"
+              aria-label={t('settings.zurückzurstartseite')}
+              title={t('settings.zurückzurstartseite')}
             >
               <ArrowLeft className="w-4 h-4" />
             </button>
diff --git a/frontend/src/pages/SettingsBackup.tsx b/frontend/src/pages/SettingsBackup.tsx
index 8a73ac3..b346d7d 100644
--- a/frontend/src/pages/SettingsBackup.tsx
+++ b/frontend/src/pages/SettingsBackup.tsx
@@ -167,7 +167,7 @@ function RestoreModal({ open, backup, onConfirm, onCancel, isRestoring }: Restor
             type="text"
             value={confirmText}
             onChange={(e) => setConfirmText(e.target.value)}
-            placeholder="RESTORE"
+            placeholder={t('settingsBackup.restore')}
             className={clsx(
               'block w-full rounded-md border border-secondary-300 px-3 py-2 text-base min-h-touch',
               'focus:outline-none focus:ring-2 focus:ring-danger-500 focus:border-danger-500',
diff --git a/frontend/src/pages/SettingsMcp.tsx b/frontend/src/pages/SettingsMcp.tsx
index 1f07de2..c973f43 100644
--- a/frontend/src/pages/SettingsMcp.tsx
+++ b/frontend/src/pages/SettingsMcp.tsx
@@ -135,7 +135,7 @@ export function SettingsMcpPage() {
               onChange={(e) => setExecuteToolName(e.target.value)}
               className="border border-secondary-300 rounded px-3 py-1.5 text-sm"
             >
-              <option value="">-- Select --</option>
+              <option value="">{t('settingsMcp.select')}</option>
               {toolsData?.tools.map((tool) => (
                 <option key={tool.name} value={tool.name}>{tool.name}</option>
               ))}
diff --git a/frontend/src/pages/SettingsPlugins.tsx b/frontend/src/pages/SettingsPlugins.tsx
index 3d1931d..17abb7e 100644
--- a/frontend/src/pages/SettingsPlugins.tsx
+++ b/frontend/src/pages/SettingsPlugins.tsx
@@ -149,7 +149,7 @@ function InstallPluginSection() {
               type="text"
               value={url}
               onChange={(e) => setUrl(e.target.value)}
-              placeholder="https://example.com/plugin.zip"
+              placeholder={t('settingsPlugins.httpsexamplecompluginzip')}
               className="flex-1 rounded-lg border border-secondary-300 px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-primary-500 focus:border-transparent"
               data-testid="plugin-url-input"
             />
diff --git a/frontend/src/pages/SettingsRechte.tsx b/frontend/src/pages/SettingsRechte.tsx
index 2a5e9ea..05bb719 100644
--- a/frontend/src/pages/SettingsRechte.tsx
+++ b/frontend/src/pages/SettingsRechte.tsx
@@ -198,7 +198,7 @@ function FreigabenTab() {
           <button
             onClick={() => setConfirmDelete(row)}
             className="p-1 rounded hover:bg-danger-50 text-danger-600"
-            aria-label="Löschen"
+            aria-label={t('settingsRechte.löschen')}
           >
             <Trash2 className="w-4 h-4" />
           </button>
@@ -217,7 +217,7 @@ function FreigabenTab() {
 
   return (
     <div className="space-y-4">
-      <Card title="Freigaben Übersicht">
+      <Card title={t('settingsRechte.freigabenübersicht')}>
         <div className="flex gap-4 mb-4">
           <div className="w-64">
             <Select
@@ -233,7 +233,7 @@ function FreigabenTab() {
           <div className="w-64">
             <Input
               label="Nach Principal suchen"
-              placeholder="Name oder ID..."
+              placeholder={t('settingsRechte.nameoderid')}
               value={filterPrincipal}
               onChange={(e) => setFilterPrincipal(e.target.value)}
             />
@@ -253,7 +253,7 @@ function FreigabenTab() {
           open={!!confirmDelete}
           onCancel={() => setConfirmDelete(null)}
           onConfirm={handleDelete}
-          title="Berechtigung löschen"
+          title={t('settingsRechte.berechtigunglöschen')}
           message={`Soll die Berechtigung für ${entityTypeMap.get(confirmDelete.entity_type) || confirmDelete.entity_type} wirklich gelöscht werden?`}
           confirmLabel={deleting ? 'Wird gelöscht...' : 'Löschen'}
           variant="danger"
@@ -325,7 +325,7 @@ function AuditTab() {
 
   return (
     <div className="space-y-4">
-      <Card title="Audit-Log für Berechtigungen">
+      <Card title={t('settingsRechte.auditlogfürberechtigungen')}>
         <Table
           columns={columns}
           data={data?.items || []}
@@ -384,7 +384,7 @@ export function SettingsRechtePage() {
       <h1 className="text-2xl font-bold text-secondary-900">Rechteverwaltung</h1>
 
       <div className="border-b border-secondary-200">
-        <nav className="flex gap-4" role="tablist" aria-label="Rechteverwaltung Tabs">
+        <nav className="flex gap-4" role="tablist" aria-label={t('settingsRechte.rechteverwaltungtabs')}>
           {tabs.map((tab) => {
             const Icon = tab.icon;
             return (
diff --git a/frontend/src/pages/SettingsSequences.tsx b/frontend/src/pages/SettingsSequences.tsx
index 08cc74c..a7ef207 100644
--- a/frontend/src/pages/SettingsSequences.tsx
+++ b/frontend/src/pages/SettingsSequences.tsx
@@ -127,7 +127,7 @@ export function SettingsSequencesPage() {
           <div className="grid grid-cols-2 gap-3">
             <div>
               <label className="block text-sm font-medium text-secondary-700">{t('sequences.prefix')}</label>
-              <input type="text" {...register('prefix')} placeholder="RE-" className="mt-1 block w-full rounded-md border border-secondary-300 px-3 py-1.5 text-sm" />
+              <input type="text" {...register('prefix')} placeholder={t('settingsSequences.re')} className="mt-1 block w-full rounded-md border border-secondary-300 px-3 py-1.5 text-sm" />
               {errors.prefix && <p className="text-xs text-danger-600 mt-1">{errorMsg(errors.prefix.message)}</p>}
             </div>
             <div>
diff --git a/frontend/src/pages/SettingsStammdaten.tsx b/frontend/src/pages/SettingsStammdaten.tsx
index c5a0494..718769b 100644
--- a/frontend/src/pages/SettingsStammdaten.tsx
+++ b/frontend/src/pages/SettingsStammdaten.tsx
@@ -167,10 +167,10 @@ function AdressenTab() {
     {
       key: 'actions', header: '', render: (row) => (
         <div className="flex gap-2">
-          <button onClick={() => handleEdit(row)} className="p-1 rounded hover:bg-secondary-100" aria-label="Bearbeiten">
+          <button onClick={() => handleEdit(row)} className="p-1 rounded hover:bg-secondary-100" aria-label={t('settingsStammdaten.bearbeiten')}>
             <Pencil className="w-4 h-4" />
           </button>
-          <button onClick={() => handleDelete(row.id)} className="p-1 rounded hover:bg-danger-50 text-danger-600" aria-label="Löschen">
+          <button onClick={() => handleDelete(row.id)} className="p-1 rounded hover:bg-danger-50 text-danger-600" aria-label={t('settingsStammdaten.löschen')}>
             <Trash2 className="w-4 h-4" />
           </button>
         </div>
@@ -180,14 +180,14 @@ function AdressenTab() {
 
   return (
     <div className="space-y-4">
-      <Card title="Adressverwaltung" actions={
+      <Card title={t('settingsStammdaten.adressverwaltung')} actions={
         <Button size="sm" onClick={handleAdd}>
           <Plus className="w-4 h-4 mr-1" />
           {t('common.add', 'Hinzufügen')}
         </Button>
       }>
         {loading ? (
-          <div className="text-center py-4 text-secondary-500">Lade Adressen...</div>
+          <div className="text-center py-4 text-secondary-500">{t('settingsStammdaten.ladeadressen')}</div>
         ) : (
           <Table columns={columns} data={addresses} rowKey={(row) => row.id} emptyMessage="Noch keine Adressen angelegt" />
         )}
@@ -352,10 +352,10 @@ function KontenTab() {
     {
       key: 'actions', header: '', render: (row) => (
         <div className="flex gap-2">
-          <button onClick={() => handleEdit(row)} className="p-1 rounded hover:bg-secondary-100" aria-label="Bearbeiten">
+          <button onClick={() => handleEdit(row)} className="p-1 rounded hover:bg-secondary-100" aria-label={t('settingsStammdaten.bearbeiten')}>
             <Pencil className="w-4 h-4" />
           </button>
-          <button onClick={() => handleDelete(row.id)} className="p-1 rounded hover:bg-danger-50 text-danger-600" aria-label="Löschen">
+          <button onClick={() => handleDelete(row.id)} className="p-1 rounded hover:bg-danger-50 text-danger-600" aria-label={t('settingsStammdaten.löschen')}>
             <Trash2 className="w-4 h-4" />
           </button>
         </div>
@@ -365,14 +365,14 @@ function KontenTab() {
 
   return (
     <div className="space-y-4">
-      <Card title="Bankkontenverwaltung" actions={
+      <Card title={t('settingsStammdaten.bankkontenverwaltung')} actions={
         <Button size="sm" onClick={handleAdd}>
           <Plus className="w-4 h-4 mr-1" />
           {t('common.add', 'Hinzufügen')}
         </Button>
       }>
         {loading ? (
-          <div className="text-center py-4 text-secondary-500">Lade Konten...</div>
+          <div className="text-center py-4 text-secondary-500">{t('settingsStammdaten.ladekonten')}</div>
         ) : (
           <Table columns={columns} data={accounts} rowKey={(row) => row.id} emptyMessage="Noch keine Konten angelegt" />
         )}
@@ -447,7 +447,7 @@ export function SettingsStammdatenPage() {
       <h1 className="text-2xl font-bold text-secondary-900">Stammdaten</h1>
 
       <div className="border-b border-secondary-200">
-        <nav className="flex gap-4" role="tablist" aria-label="Stammdaten Tabs">
+        <nav className="flex gap-4" role="tablist" aria-label={t('settingsStammdaten.stammdatentabs')}>
           {tabs.map((tab) => (
             <button
               key={tab.key}
diff --git a/frontend/src/pages/SettingsSystem.tsx b/frontend/src/pages/SettingsSystem.tsx
index 86dab85..633039a 100644
--- a/frontend/src/pages/SettingsSystem.tsx
+++ b/frontend/src/pages/SettingsSystem.tsx
@@ -22,7 +22,7 @@ export function SettingsSystemPage() {
       <h1 className="text-2xl font-bold text-secondary-900">System</h1>
 
       <div className="border-b border-secondary-200">
-        <nav className="flex gap-4" role="tablist" aria-label="System Tabs">
+        <nav className="flex gap-4" role="tablist" aria-label={t('settingsSystem.systemtabs')}>
           {tabs.map((tab) => (
             <button
               key={tab.key}
diff --git a/frontend/src/pages/SettingsTaxes.tsx b/frontend/src/pages/SettingsTaxes.tsx
index 08bc009..1a5e492 100644
--- a/frontend/src/pages/SettingsTaxes.tsx
+++ b/frontend/src/pages/SettingsTaxes.tsx
@@ -135,7 +135,7 @@ export function SettingsTaxesPage() {
             </div>
             <div>
               <label className="block text-sm font-medium text-secondary-700">{t('taxes.country')}</label>
-              <input type="text" {...register('country')} maxLength={2} placeholder="DE" className="mt-1 block w-full rounded-md border border-secondary-300 px-3 py-1.5 text-sm" />
+              <input type="text" {...register('country')} maxLength={2} placeholder={t('settingsTaxes.de')} className="mt-1 block w-full rounded-md border border-secondary-300 px-3 py-1.5 text-sm" />
               {errors.country && <p className="text-xs text-danger-600 mt-1">{errorMsg(errors.country.message)}</p>}
             </div>
           </div>
diff --git a/frontend/src/pages/SettingsTheme.tsx b/frontend/src/pages/SettingsTheme.tsx
index 73e7e93..d2d5778 100644
--- a/frontend/src/pages/SettingsTheme.tsx
+++ b/frontend/src/pages/SettingsTheme.tsx
@@ -217,7 +217,7 @@ export function SettingsThemePage() {
                 value={primaryColor}
                 onChange={(e) => handlePrimaryChange(e.target.value)}
                 className="flex-1"
-                placeholder="#2563eb"
+                placeholder={t('settingsTheme.2563eb')}
               />
             </div>
           </div>
@@ -239,7 +239,7 @@ export function SettingsThemePage() {
                 value={accentColor}
                 onChange={(e) => handleAccentChange(e.target.value)}
                 className="flex-1"
-                placeholder="#d946ef"
+                placeholder={t('settingsTheme.d946ef')}
               />
             </div>
           </div>
@@ -302,10 +302,10 @@ export function SettingsThemePage() {
         <div className="space-y-4">
           {/* Buttons */}
           <div className="flex flex-wrap gap-2">
-            <Button variant="primary" size="sm">Primary Button</Button>
-            <Button variant="secondary" size="sm">Secondary Button</Button>
-            <Button variant="danger" size="sm">Danger Button</Button>
-            <Button variant="ghost" size="sm">Ghost Button</Button>
+            <Button variant="primary" size="sm">{t('settingsTheme.primarybutton')}</Button>
+            <Button variant="secondary" size="sm">{t('settingsTheme.secondarybutton')}</Button>
+            <Button variant="danger" size="sm">{t('settingsTheme.dangerbutton')}</Button>
+            <Button variant="ghost" size="sm">{t('settingsTheme.ghostbutton')}</Button>
           </div>
           {/* Badges */}
           <div className="flex flex-wrap gap-2">
@@ -317,11 +317,11 @@ export function SettingsThemePage() {
           </div>
           {/* Input preview */}
           <div className="max-w-xs">
-            <Input label="Beispiel-Input" placeholder="Text eingeben..." />
+            <Input label="Beispiel-Input" placeholder={t('settingsTheme.texteingeben')} />
           </div>
           {/* Card preview */}
           <div className="bg-white rounded-lg border border-secondary-200 p-4 shadow-sm">
-            <p className="text-sm text-secondary-700">Dies ist eine Beispiel-Karte mit dem aktuellen Theme.</p>
+            <p className="text-sm text-secondary-700">{t('settingsTheme.diesisteinebeispielkartemit')}</p>
           </div>
         </div>
       </Card>
diff --git a/frontend/src/pages/SettingsUserManagement.tsx b/frontend/src/pages/SettingsUserManagement.tsx
index 04421f6..5d64e86 100644
--- a/frontend/src/pages/SettingsUserManagement.tsx
+++ b/frontend/src/pages/SettingsUserManagement.tsx
@@ -19,7 +19,7 @@ export function SettingsUserManagementPage() {
       <h1 className="text-2xl font-bold text-secondary-900">Nutzerverwaltung</h1>
 
       <div className="border-b border-secondary-200">
-        <nav className="flex gap-4" role="tablist" aria-label="Nutzerverwaltung Tabs">
+        <nav className="flex gap-4" role="tablist" aria-label={t('settingsUserManagement.nutzerverwaltungtabs')}>
           {tabs.map((tab) => (
             <button
               key={tab.key}
diff --git a/frontend/src/pages/SettingsUsers.tsx b/frontend/src/pages/SettingsUsers.tsx
index 6bd4304..222ff4a 100644
--- a/frontend/src/pages/SettingsUsers.tsx
+++ b/frontend/src/pages/SettingsUsers.tsx
@@ -260,7 +260,7 @@ export function SettingsUsersPage() {
             type="email"
             {...register('email')}
             error={errorMsg(errors.email?.message)}
-            placeholder="neu.mitarbeiter@firma.de"
+            placeholder={t('settingsUsers.neumitarbeiterfirmade')}
             data-testid="invite-email"
           />
           <Input
diff --git a/frontend/src/pages/StartPage.tsx b/frontend/src/pages/StartPage.tsx
index f1f7d4c..1847590 100644
--- a/frontend/src/pages/StartPage.tsx
+++ b/frontend/src/pages/StartPage.tsx
@@ -64,8 +64,8 @@ export function StartPage() {
           <button
             onClick={() => navigate('/start')}
             className="p-1.5 rounded-md text-secondary-400 hover:bg-secondary-100 hover:text-secondary-700 flex items-center justify-center focus:outline-none focus-visible:ring-2 focus-visible:ring-primary-500"
-            aria-label="Zurück zur Startseite"
-            title="Zurück zur Startseite"
+            aria-label={t('startPage.zurückzurstartseite')}
+            title={t('startPage.zurückzurstartseite')}
           >
             <ArrowLeft className="w-4 h-4" />
           </button>
@@ -101,7 +101,7 @@ export function StartPage() {
         <div className="max-w-5xl mx-auto p-8">
           <div className="mb-8">
             <h1 className="text-2xl font-bold text-secondary-900">Willkommen{user?.first_name ? `, ${user.first_name}` : ''}!</h1>
-            <p className="text-sm text-secondary-500 mt-1">Wähle einen Workspace aus</p>
+            <p className="text-sm text-secondary-500 mt-1">{t('startPage.wähleeinenworkspaceaus')}</p>
           </div>
 
           {/* Dashboard stats */}
@@ -171,7 +171,7 @@ export function StartPage() {
             >
               <Plus className="w-8 h-8 text-secondary-300 group-hover:text-primary-400 transition-colors" />
               <span className="text-sm text-secondary-400 group-hover:text-primary-600 mt-2 transition-colors">
-                Workspace hinzufügen
+                {t('startPage.workspacehinzufügen')}
               </span>
             </button>
           </div>
diff --git a/frontend/src/pages/Tasks.tsx b/frontend/src/pages/Tasks.tsx
index 7c404c2..7db320f 100644
--- a/frontend/src/pages/Tasks.tsx
+++ b/frontend/src/pages/Tasks.tsx
@@ -116,18 +116,18 @@ function TaskTree({ tasks, selectedTaskId, onSelect, filter, setFilter }: TaskTr
           <button
             onClick={() => setTreeMode('status')}
             className={`px-2 py-1 text-xs rounded ${treeMode === 'status' ? 'bg-primary-100 text-primary-700' : 'text-secondary-500 hover:bg-secondary-100'}`}
-          >Nach Status</button>
+          >{t('tasks.nachstatus')}</button>
           <button
             onClick={() => setTreeMode('priority')}
             className={`px-2 py-1 text-xs rounded ${treeMode === 'priority' ? 'bg-primary-100 text-primary-700' : 'text-secondary-500 hover:bg-secondary-100'}`}
-          >Nach Priorität</button>
+          >{t('tasks.nachpriorität')}</button>
         </div>
       </div>
       <div className="flex-1 overflow-y-auto p-2">
         <button
           onClick={() => setFilter({})}
           className={`w-full text-left px-3 py-2 rounded-md text-sm font-medium min-h-touch hover:bg-secondary-100 ${!filter.status && !filter.priority ? 'bg-primary-50 text-primary-700' : 'text-secondary-700'}`}
-        >Alle Tasks ({tasks.length})</button>
+        >{t('tasks.alletasks')}{tasks.length})</button>
         {grouped.map(group => (
           <div key={group.key} className="mt-1">
             <div
@@ -201,7 +201,7 @@ function TaskDetail({ task, onEdit, onDelete, onStatusChange }: TaskDetailProps)
         <div><span className="font-medium text-secondary-500">Status:</span> 
           <select value={task.status} onChange={(e) => onStatusChange(e.target.value as TaskStatus)} className="ml-2 text-sm border border-secondary-200 rounded px-2 py-1">
             <option value="open">Offen</option>
-            <option value="in_progress">In Bearbeitung</option>
+            <option value="in_progress">{t('tasks.inbearbeitung')}</option>
             <option value="review">Review</option>
             <option value="done">Erledigt</option>
             <option value="cancelled">Abgebrochen</option>
@@ -370,7 +370,7 @@ export function TasksPage() {
                           </div>
                         </div>
                       ))}
-                      {col.items.length === 0 && <p className="text-xs text-secondary-400 text-center py-4">Keine Tasks</p>}
+                      {col.items.length === 0 && <p className="text-xs text-secondary-400 text-center py-4">{t('tasks.keinetasks')}</p>}
                     </div>
                   </div>
                 ))}
diff --git a/frontend/src/pages/Workflows.tsx b/frontend/src/pages/Workflows.tsx
index a299030..a86e527 100644
--- a/frontend/src/pages/Workflows.tsx
+++ b/frontend/src/pages/Workflows.tsx
@@ -92,7 +92,7 @@ export function WorkflowsPage() {
             {t('workflows.title', 'Workflows')}
           </h1>
           <p className="text-sm text-secondary-500 mt-1">
-            Definieren und verwalten Sie automatisierte Workflows
+            {t('workflows.definierenundverwaltensieautomatisiertew')}
           </p>
         </div>
         {activeTab === 'definitions' && (
@@ -147,9 +147,9 @@ export function WorkflowsPage() {
             <Card className="p-6">
               <div className="flex items-center gap-3 text-danger-600">
                 <AlertCircle className="h-5 w-5" />
-                <span>Fehler beim Laden der Workflows</span>
+                <span>{t('workflows.fehlerbeimladenderworkflows')}</span>
                 <Button size="sm" variant="secondary" onClick={() => refetch()}>
-                  Erneut versuchen
+                  {t('workflows.erneutversuchen')}
                 </Button>
               </div>
             </Card>
@@ -157,12 +157,12 @@ export function WorkflowsPage() {
 
           {!isLoading && !isError && workflows.length === 0 && (
             <EmptyState
-              title="Keine Workflows"
+              title={t('workflows.keineworkflows')}
               description="Erstellen Sie Ihren ersten Workflow, um automatisierte Prozesse zu definieren."
               icon={<WorkflowIcon className="h-8 w-8" />}
               action={
                 <Button onClick={openCreate} icon={<Plus className="h-4 w-4" />}>
-                  Workflow erstellen
+                  {t('workflows.workflowerstellen')}
                 </Button>
               }
             />
@@ -216,7 +216,7 @@ export function WorkflowsPage() {
                         size="sm"
                         variant="ghost"
                         onClick={() => openEdit(wf)}
-                        title="Bearbeiten"
+                        title={t('workflows.bearbeiten')}
                       >
                         <Settings2 className="h-4 w-4" />
                       </Button>
@@ -224,7 +224,7 @@ export function WorkflowsPage() {
                         size="sm"
                         variant="ghost"
                         onClick={() => setConfirmDelete(wf)}
-                        title="Loeschen"
+                        title={t('workflows.loeschen')}
                       >
                         <Trash2 className="h-4 w-4 text-danger-500" />
                       </Button>
@@ -269,7 +269,7 @@ export function WorkflowsPage() {
         open={!!confirmDelete}
         onCancel={() => setConfirmDelete(null)}
         onConfirm={handleDelete}
-        title="Workflow loeschen"
+        title={t('workflows.workflowloeschen')}
         message={`Moechten Sie den Workflow "${confirmDelete?.name}" wirklich loeschen?`}
         confirmLabel="Loeschen"
         variant="danger"
diff --git a/frontend/src/pages/agents/AgentsOverview.tsx b/frontend/src/pages/agents/AgentsOverview.tsx
index 34f16aa..fbcd067 100644
--- a/frontend/src/pages/agents/AgentsOverview.tsx
+++ b/frontend/src/pages/agents/AgentsOverview.tsx
@@ -20,9 +20,9 @@ export function AgentsOverviewPage() {
 
   return (
     <div className="max-w-4xl mx-auto">
-      <h1 className="text-2xl font-bold text-secondary-900 mb-4">Agenten Übersicht</h1>
+      <h1 className="text-2xl font-bold text-secondary-900 mb-4">{t('agentsOverview.agentenübersicht')}</h1>
       <p className="text-secondary-600 mb-6">
-        Verwalten Sie KI-Agenten, führen Sie diese aus und überwachen Sie deren Ausführungen.
+        {t('agentsOverview.verwaltensiekiagentenführensie')}
       </p>
 
       {/* Loading */}
diff --git a/frontend/src/pages/agents/AgentsPlaceholder.tsx b/frontend/src/pages/agents/AgentsPlaceholder.tsx
index b2aca55..e52739d 100644
--- a/frontend/src/pages/agents/AgentsPlaceholder.tsx
+++ b/frontend/src/pages/agents/AgentsPlaceholder.tsx
@@ -1,11 +1,13 @@
 import React from 'react';
+import { useTranslation } from 'react-i18next';
 
 export function AgentsPlaceholderPage() {
+  const { t } = useTranslation();
   return (
     <div className="max-w-4xl mx-auto">
       <h1 className="text-2xl font-bold text-secondary-900 mb-4">Agenten</h1>
       <p className="text-secondary-600">
-        Diese Seite wird gerade erstellt. Wählen Sie ein Thema aus dem Menü links.
+        {t('agentsPlaceholder.dieseseitewirdgeradeerstelltwählen')}
       </p>
     </div>
   );
diff --git a/frontend/src/pages/automation/AutomationOverview.tsx b/frontend/src/pages/automation/AutomationOverview.tsx
index 5c12de8..395cc4d 100644
--- a/frontend/src/pages/automation/AutomationOverview.tsx
+++ b/frontend/src/pages/automation/AutomationOverview.tsx
@@ -1,11 +1,13 @@
 import React from 'react';
+import { useTranslation } from 'react-i18next';
 
 export function AutomationOverviewPage() {
+  const { t } = useTranslation();
   return (
     <div className="max-w-4xl mx-auto">
-      <h1 className="text-2xl font-bold text-secondary-900 mb-4">Automation Übersicht</h1>
+      <h1 className="text-2xl font-bold text-secondary-900 mb-4">{t('automationOverview.automationübersicht')}</h1>
       <p className="text-secondary-600 mb-6">
-        Erstellen und verwalten Sie automatisierte Workflows. Definieren Sie Trigger, Bedingungen und Aktionen.
+        {t('automationOverview.erstellenundverwaltensieautomatisiertewo')}
       </p>
       <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
         <div className="p-6 bg-white rounded-xl border border-secondary-200">
@@ -13,14 +15,14 @@ export function AutomationOverviewPage() {
             <svg className="w-6 h-6 text-warning-600" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M13 10V3L4 14h7v7l9-11h-7z" /></svg>
           </div>
           <h3 className="font-semibold text-secondary-900">Automations</h3>
-          <p className="text-sm text-secondary-500 mt-1">Workflows erstellen und verwalten</p>
+          <p className="text-sm text-secondary-500 mt-1">{t('automationOverview.workflowserstellenundverwalten')}</p>
         </div>
         <div className="p-6 bg-white rounded-xl border border-secondary-200">
           <div className="w-12 h-12 bg-primary-100 rounded-lg flex items-center justify-center mb-3">
             <svg className="w-6 h-6 text-primary-600" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M10.325 4.317c.426-1.756 2.924-1.756 3.35 0a1.724 1.724 0 002.573 1.066c1.543-.94 3.31.826 2.37 2.37a1.724 1.724 0 001.065 2.572c1.756.426 1.756 2.924 0 3.35a1.724 1.724 0 00-1.066 2.573c.94 1.543-.826 3.31-2.37 2.37a1.724 1.724 0 00-2.572 1.065c-.426 1.756-2.924 1.756-3.35 0a1.724 1.724 0 00-2.573-1.066c-1.543.94-3.31-.826-2.37-2.37a1.724 1.724 0 00-1.065-2.572c-1.756-.426-1.756-2.924 0-3.35a1.724 1.724 0 001.066-2.573c-.94-1.543.826-3.31 2.37-2.37.996.608 2.296.07 2.572-1.065z" /><path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" /></svg>
           </div>
           <h3 className="font-semibold text-secondary-900">Einstellungen</h3>
-          <p className="text-sm text-secondary-500 mt-1">Trigger, Aktionen und Bedingungen konfigurieren</p>
+          <p className="text-sm text-secondary-500 mt-1">{t('automationOverview.triggeraktionenundbedingungenkonfigurier')}</p>
         </div>
       </div>
     </div>
diff --git a/frontend/src/pages/automation/AutomationPlaceholder.tsx b/frontend/src/pages/automation/AutomationPlaceholder.tsx
index 9be3fc6..63dcc77 100644
--- a/frontend/src/pages/automation/AutomationPlaceholder.tsx
+++ b/frontend/src/pages/automation/AutomationPlaceholder.tsx
@@ -1,11 +1,13 @@
 import React from 'react';
+import { useTranslation } from 'react-i18next';
 
 export function AutomationPlaceholderPage() {
+  const { t } = useTranslation();
   return (
     <div className="max-w-4xl mx-auto">
       <h1 className="text-2xl font-bold text-secondary-900 mb-4">Automation</h1>
       <p className="text-secondary-600">
-        Diese Seite wird gerade erstellt. Wählen Sie ein Thema aus dem Menü links.
+        {t('automationPlaceholder.dieseseitewirdgeradeerstelltwählen')}
       </p>
     </div>
   );
diff --git a/frontend/src/pages/help/HelpApiDocs.tsx b/frontend/src/pages/help/HelpApiDocs.tsx
index 671f15e..5dbf7d4 100644
--- a/frontend/src/pages/help/HelpApiDocs.tsx
+++ b/frontend/src/pages/help/HelpApiDocs.tsx
@@ -1,31 +1,33 @@
 import React from 'react';
+import { useTranslation } from 'react-i18next';
 
 export function HelpApiDocsPage() {
+  const { t } = useTranslation();
   return (
     <div className="max-w-4xl mx-auto prose prose-secondary">
-      <h1 className="text-2xl font-bold text-secondary-900 mb-4">API Dokumentation</h1>
+      <h1 className="text-2xl font-bold text-secondary-900 mb-4">{t('helpApiDocs.apidokumentation')}</h1>
       <p className="text-secondary-600 mb-4">
-        Die vollständige API-Dokumentation finden Sie unter <a href="/docs" target="_blank" rel="noopener noreferrer" className="text-primary-600 hover:underline">/docs</a> (Swagger UI).
+        {t('helpApiDocs.dievollständigeapidokumentationfindensie')} <a href="/docs" target="_blank" rel="noopener noreferrer" className="text-primary-600 hover:underline">/docs</a> {t('helpApiDocs.swaggerui')}
       </p>
       <h2 className="text-lg font-semibold text-secondary-800 mt-6 mb-2">Übersicht</h2>
       <p className="text-secondary-600 mb-4">
-        LeoCRM bietet eine REST-API mit über 224 Endpoints. Die API verwendet JSON für Request- und Response-Bodies.
+        {t('helpApiDocs.leocrmbieteteinerestapimit')}
       </p>
       <h2 className="text-lg font-semibold text-secondary-800 mt-6 mb-2">Authentifizierung</h2>
       <p className="text-secondary-600 mb-4">
-        Die API verwendet Session-basierte Authentifizierung mit HttpOnly-Cookies. Nach dem Login über <code className="bg-secondary-100 px-1.5 py-0.5 rounded text-sm">POST /api/v1/auth/login</code> wird ein Session-Cookie gesetzt.
+        {t('helpApiDocs.dieapiverwendetsessionbasierteauthentifi')} <code className="bg-secondary-100 px-1.5 py-0.5 rounded text-sm">{t('helpApiDocs.postapiv1authlogin')}</code> {t('helpApiDocs.wirdeinsessioncookiegesetzt')}
       </p>
-      <h2 className="text-lg font-semibold text-secondary-800 mt-6 mb-2">Wichtige Endpoints</h2>
+      <h2 className="text-lg font-semibold text-secondary-800 mt-6 mb-2">{t('helpApiDocs.wichtigeendpoints')}</h2>
       <ul className="list-disc list-inside text-secondary-600 space-y-1">
-        <li><code className="bg-secondary-100 px-1.5 py-0.5 rounded text-sm">GET /api/v1/contacts</code> — Kontakte abrufen</li>
-        <li><code className="bg-secondary-100 px-1.5 py-0.5 rounded text-sm">POST /api/v1/contacts</code> — Kontakt erstellen</li>
-        <li><code className="bg-secondary-100 px-1.5 py-0.5 rounded text-sm">GET /api/v1/calendar/entries</code> — Kalendereinträge</li>
-        <li><code className="bg-secondary-100 px-1.5 py-0.5 rounded text-sm">GET /api/v1/mail/accounts</code> — Mail-Konten</li>
-        <li><code className="bg-secondary-100 px-1.5 py-0.5 rounded text-sm">GET /api/v1/plugins/active-manifests</code> — Plugin-Manifeste</li>
+        <li><code className="bg-secondary-100 px-1.5 py-0.5 rounded text-sm">{t('helpApiDocs.getapiv1contacts')}</code> {t('helpApiDocs.kontakteabrufen')}</li>
+        <li><code className="bg-secondary-100 px-1.5 py-0.5 rounded text-sm">{t('helpApiDocs.postapiv1contacts')}</code> {t('helpApiDocs.kontakterstellen')}</li>
+        <li><code className="bg-secondary-100 px-1.5 py-0.5 rounded text-sm">{t('helpApiDocs.getapiv1calendarentries')}</code> {t('helpApiDocs.kalendereinträge')}</li>
+        <li><code className="bg-secondary-100 px-1.5 py-0.5 rounded text-sm">{t('helpApiDocs.getapiv1mailaccounts')}</code> {t('helpApiDocs.mailkonten')}</li>
+        <li><code className="bg-secondary-100 px-1.5 py-0.5 rounded text-sm">{t('helpApiDocs.getapiv1pluginsactivemanifests')}</code> {t('helpApiDocs.pluginmanifeste')}</li>
       </ul>
       <div className="mt-6 p-4 bg-primary-50 rounded-lg border border-primary-200">
         <p className="text-sm text-primary-700">
-          📖 <strong>Vollständige Doku:</strong> <a href="/docs" target="_blank" rel="noopener noreferrer" className="underline">Swagger UI öffnen</a>
+          📖 <strong>{t('helpApiDocs.vollständigedoku')}</strong> <a href="/docs" target="_blank" rel="noopener noreferrer" className="underline">{t('helpApiDocs.swaggeruiöffnen')}</a>
         </p>
       </div>
     </div>
diff --git a/frontend/src/pages/help/HelpContacts.tsx b/frontend/src/pages/help/HelpContacts.tsx
index 6064022..4b87f46 100644
--- a/frontend/src/pages/help/HelpContacts.tsx
+++ b/frontend/src/pages/help/HelpContacts.tsx
@@ -1,24 +1,26 @@
 import React from 'react';
+import { useTranslation } from 'react-i18next';
 
 export function HelpContactsPage() {
+  const { t } = useTranslation();
   return (
     <div className="max-w-3xl mx-auto prose prose-secondary">
-      <h1 className="text-2xl font-bold text-secondary-900 mb-4">Kontakte verwalten</h1>
-      <h2 className="text-lg font-semibold text-secondary-800 mt-6 mb-2">Kontakte erstellen</h2>
+      <h1 className="text-2xl font-bold text-secondary-900 mb-4">{t('helpContacts.kontakteverwalten')}</h1>
+      <h2 className="text-lg font-semibold text-secondary-800 mt-6 mb-2">{t('helpContacts.kontakteerstellen')}</h2>
       <p className="text-secondary-600 mb-4">
-        Gehen Sie zu Kontakte und klicken Sie auf "Neuer Kontakt". Füllen Sie die Felder aus und speichern Sie. Sie können Firmen und Personen anlegen.
+        {t('helpContacts.gehensiezukontakteundklicken')}
       </p>
       <h2 className="text-lg font-semibold text-secondary-800 mt-6 mb-2">Kontaktpersonen</h2>
       <p className="text-secondary-600 mb-4">
-        Jeder Firma können mehrere Kontaktpersonen zugeordnet werden. Öffnen Sie eine Firma und fügen Sie Personen hinzu.
+        {t('helpContacts.jederfirmakönnenmehrerekontaktpersonenzu')}
       </p>
       <h2 className="text-lg font-semibold text-secondary-800 mt-6 mb-2">Tags</h2>
       <p className="text-secondary-600 mb-4">
-        Verwenden Sie Tags um Kontakte zu kategorisieren. Tags können frei vergeben werden und helfen bei der Filterung.
+        {t('helpContacts.verwendensietagsumkontaktezu')}
       </p>
       <h2 className="text-lg font-semibold text-secondary-800 mt-6 mb-2">Ordner</h2>
       <p className="text-secondary-600 mb-4">
-        Organisieren Sie Kontakte in Ordnern. Ordner können verschachtelt werden und eigene Berechtigungen haben.
+        {t('helpContacts.organisierensiekontakteinordnernordner')}
       </p>
     </div>
   );
diff --git a/frontend/src/pages/help/HelpLogin.tsx b/frontend/src/pages/help/HelpLogin.tsx
index 2dd0b06..b55e630 100644
--- a/frontend/src/pages/help/HelpLogin.tsx
+++ b/frontend/src/pages/help/HelpLogin.tsx
@@ -1,22 +1,24 @@
 import React from 'react';
+import { useTranslation } from 'react-i18next';
 
 export function HelpLoginPage() {
+  const { t } = useTranslation();
   return (
     <div className="max-w-3xl mx-auto prose prose-secondary">
-      <h1 className="text-2xl font-bold text-secondary-900 mb-4">Login & Anmeldung</h1>
+      <h1 className="text-2xl font-bold text-secondary-900 mb-4">{t('helpLogin.loginanmeldung')}</h1>
       <h2 className="text-lg font-semibold text-secondary-800 mt-6 mb-2">Anmeldung</h2>
       <p className="text-secondary-600 mb-4">
-        Rufen Sie die LeoCRM-URL auf (z.B. https://crm.media-on.de) und melden Sie sich mit Ihrer E-Mail-Adresse und Ihrem Passwort an.
+        {t('helpLogin.rufensiedieleocrmurlauf')}
       </p>
-      <h2 className="text-lg font-semibold text-secondary-800 mt-6 mb-2">Passwort vergessen?</h2>
+      <h2 className="text-lg font-semibold text-secondary-800 mt-6 mb-2">{t('helpLogin.passwortvergessen')}</h2>
       <p className="text-secondary-600 mb-4">
-        Klicken Sie auf der Login-Seite auf "Passwort vergessen". Sie erhalten eine E-Mail mit einem Link zum Zurücksetzen Ihres Passworts.
+        {t('helpLogin.klickensieaufderloginseite')}
       </p>
       <h2 className="text-lg font-semibold text-secondary-800 mt-6 mb-2">Sicherheit</h2>
       <ul className="list-disc list-inside text-secondary-600 space-y-1">
-        <li>Ihre Sitzung wird über ein sicheres HttpOnly-Cookie verwaltet</li>
-        <li>Nach Inaktivität wird die Sitzung automatisch beendet</li>
-        <li>Passwörter werden mit bcrypt (cost=12) verschlüsselt gespeichert</li>
+        <li>{t('helpLogin.ihresitzungwirdübereinsicheres')}</li>
+        <li>{t('helpLogin.nachinaktivitätwirddiesitzungautomatisch')}</li>
+        <li>{t('helpLogin.passwörterwerdenmitbcryptcost12')}</li>
       </ul>
     </div>
   );
diff --git a/frontend/src/pages/help/HelpMailSetup.tsx b/frontend/src/pages/help/HelpMailSetup.tsx
index e9348d4..8e9c535 100644
--- a/frontend/src/pages/help/HelpMailSetup.tsx
+++ b/frontend/src/pages/help/HelpMailSetup.tsx
@@ -1,24 +1,26 @@
 import React from 'react';
+import { useTranslation } from 'react-i18next';
 
 export function HelpMailSetupPage() {
+  const { t } = useTranslation();
   return (
     <div className="max-w-3xl mx-auto prose prose-secondary">
-      <h1 className="text-2xl font-bold text-secondary-900 mb-4">Postfach einrichten</h1>
-      <h2 className="text-lg font-semibold text-secondary-800 mt-6 mb-2">IMAP-Konto hinzufügen</h2>
+      <h1 className="text-2xl font-bold text-secondary-900 mb-4">{t('helpMailSetup.postfacheinrichten')}</h1>
+      <h2 className="text-lg font-semibold text-secondary-800 mt-6 mb-2">{t('helpMailSetup.imapkontohinzufügen')}</h2>
       <p className="text-secondary-600 mb-4">
-        Gehen Sie zu Einstellungen → Email und klicken Sie auf "Konto hinzufügen". Geben Sie Ihre IMAP- und SMTP-Serverdaten ein.
+        {t('helpMailSetup.gehensiezueinstellungenemailund')}
       </p>
-      <h2 className="text-lg font-semibold text-secondary-800 mt-6 mb-2">Benötigte Daten</h2>
+      <h2 className="text-lg font-semibold text-secondary-800 mt-6 mb-2">{t('helpMailSetup.benötigtedaten')}</h2>
       <ul className="list-disc list-inside text-secondary-600 space-y-1">
-        <li>IMAP-Server (z.B. imap.example.com)</li>
-        <li>IMAP-Port (meist 993 für SSL)</li>
-        <li>SMTP-Server (z.B. smtp.example.com)</li>
-        <li>SMTP-Port (meist 587 für TLS)</li>
-        <li>E-Mail-Adresse und Passwort</li>
+        <li>{t('helpMailSetup.imapserverzbimapexample')}</li>
+        <li>{t('helpMailSetup.imapportmeist993fürssl')}</li>
+        <li>{t('helpMailSetup.smtpserverzbsmtpexample')}</li>
+        <li>{t('helpMailSetup.smtpportmeist587fürtls')}</li>
+        <li>{t('helpMailSetup.emailadresseundpasswort')}</li>
       </ul>
       <h2 className="text-lg font-semibold text-secondary-800 mt-6 mb-2">Synchronisation</h2>
       <p className="text-secondary-600 mb-4">
-        Nach dem Einrichten wird Ihr Postfach automatisch synchronisiert. Neue E-Mails werden im Hintergrund abgerufen.
+        {t('helpMailSetup.nachdemeinrichtenwirdihrpostfach')}
       </p>
     </div>
   );
diff --git a/frontend/src/pages/help/HelpNavigation.tsx b/frontend/src/pages/help/HelpNavigation.tsx
index 15f0e5b..e0b6ec0 100644
--- a/frontend/src/pages/help/HelpNavigation.tsx
+++ b/frontend/src/pages/help/HelpNavigation.tsx
@@ -1,28 +1,30 @@
 import React from 'react';
+import { useTranslation } from 'react-i18next';
 
 export function HelpNavigationPage() {
+  const { t } = useTranslation();
   return (
     <div className="max-w-3xl mx-auto prose prose-secondary">
       <h1 className="text-2xl font-bold text-secondary-900 mb-4">Navigation</h1>
       <h2 className="text-lg font-semibold text-secondary-800 mt-6 mb-2">Startseite</h2>
       <p className="text-secondary-600 mb-4">
-        Nach dem Login gelangen Sie zur Startseite. Hier können Sie einen Workspace auswählen oder zu den Einstellungen und der Hilfe navigieren.
+        {t('helpNavigation.nachdemlogingelangensiezur')}
       </p>
       <h2 className="text-lg font-semibold text-secondary-800 mt-6 mb-2">Workspace</h2>
       <p className="text-secondary-600 mb-4">
-        Ein Workspace ist Ihr Arbeitsbereich mit Sidebar-Navigation. Hier finden Sie Kontakte, Kalender, E-Mail und alle anderen Module.
+        {t('helpNavigation.einworkspaceistihrarbeitsbereichmit')}
       </p>
       <h2 className="text-lg font-semibold text-secondary-800 mt-6 mb-2">Sidebar</h2>
       <p className="text-secondary-600 mb-4">
-        Das Hamburger-Menü oben links blendet die Seitenleiste ein und aus. Die Sidebar zeigt alle verfügbaren Module.
+        {t('helpNavigation.dashamburgermenüobenlinksblendet')}
       </p>
       <h2 className="text-lg font-semibold text-secondary-800 mt-6 mb-2">Zurück-Pfeil</h2>
       <p className="text-secondary-600 mb-4">
-        Rechts neben dem Hamburger-Menü finden Sie einen Zurück-Pfeil, der Sie zurück zur Startseite bringt.
+        {t('helpNavigation.rechtsnebendemhamburgermenüfinden')}
       </p>
-      <h2 className="text-lg font-semibold text-secondary-800 mt-6 mb-2">Globale Suche</h2>
+      <h2 className="text-lg font-semibold text-secondary-800 mt-6 mb-2">{t('helpNavigation.globalesuche')}</h2>
       <p className="text-secondary-600 mb-4">
-        Verwenden Sie die Lupe oben oder Strg+K um das Kommando-Palette zu öffnen und schnell nach Kontakten, Mails oder Dateien zu suchen.
+        {t('helpNavigation.verwendensiedielupeobenoder')}
       </p>
     </div>
   );
diff --git a/frontend/src/pages/help/HelpPlaceholder.tsx b/frontend/src/pages/help/HelpPlaceholder.tsx
index ecfdd85..d3e9553 100644
--- a/frontend/src/pages/help/HelpPlaceholder.tsx
+++ b/frontend/src/pages/help/HelpPlaceholder.tsx
@@ -1,16 +1,18 @@
 import React from 'react';
 import { useParams } from 'react-router-dom';
+import { useTranslation } from 'react-i18next';
 
 export function HelpPlaceholderPage() {
+  const { t } = useTranslation();
   const params = useParams();
   return (
     <div className="max-w-3xl mx-auto prose prose-secondary">
       <h1 className="text-2xl font-bold text-secondary-900 mb-4">Hilfe</h1>
       <p className="text-secondary-600">
-        Diese Hilfeseite ({params['*'] || 'unbekannt'}) wird gerade erstellt. Schauen Sie später wieder vorbei.
+        {t('helpPlaceholder.diesehilfeseite')}{params['*'] || 'unbekannt'}{t('helpPlaceholder.wirdgeradeerstelltschauensiespäter')}
       </p>
       <p className="text-secondary-400 text-sm mt-4">
-        Wählen Sie ein Thema aus dem Menü links um weitere Hilfe-Artikel zu lesen.
+        {t('helpPlaceholder.wählensieeinthemaausdem')}
       </p>
     </div>
   );
diff --git a/frontend/src/pages/help/HelpWelcome.tsx b/frontend/src/pages/help/HelpWelcome.tsx
index 5ff0df8..7e70b50 100644
--- a/frontend/src/pages/help/HelpWelcome.tsx
+++ b/frontend/src/pages/help/HelpWelcome.tsx
@@ -1,31 +1,33 @@
 import React from 'react';
+import { useTranslation } from 'react-i18next';
 
 export function HelpWelcomePage() {
+  const { t } = useTranslation();
   return (
     <div className="max-w-3xl mx-auto prose prose-secondary">
-      <h1 className="text-2xl font-bold text-secondary-900 mb-4">Willkommen bei LeoCRM</h1>
+      <h1 className="text-2xl font-bold text-secondary-900 mb-4">{t('helpWelcome.willkommenbeileocrm')}</h1>
       <p className="text-secondary-600 mb-4">
-        LeoCRM ist ein selbst-gehostetes CRM-System für kleine Vertriebsteams. Es bietet Kontakte, Kalender, E-Mail, Dateiverwaltung und mehr — alles in einer Anwendung.
+        {t('helpWelcome.leocrmisteinselbstgehostetescrm')}
       </p>
       <h2 className="text-lg font-semibold text-secondary-800 mt-6 mb-2">Hauptfunktionen</h2>
       <ul className="list-disc list-inside text-secondary-600 space-y-1">
-        <li><strong>Kontakte verwalten</strong> — Firmen, Personen, Kontaktdaten zentral speichern</li>
-        <li><strong>Kalender</strong> — Termine, Aufgaben und Erinnerungen</li>
-        <li><strong>E-Mail</strong> — IMAP-Postfächer synchronisieren, direkt antworten</li>
-        <li><strong>Dateien (DMS)</strong> — Dokumente hochladen, teilen und verwalten</li>
-        <li><strong>KI-Assistent</strong> — Intelligente Hilfe bei der Arbeit</li>
-        <li><strong>Workflows</strong> — Automatisierte Prozesse</li>
+        <li><strong>{t('helpWelcome.kontakteverwalten')}</strong> {t('helpWelcome.firmenpersonenkontaktdatenzentralspeiche')}</li>
+        <li><strong>Kalender</strong> {t('helpWelcome.termineaufgabenunderinnerungen')}</li>
+        <li><strong>E-Mail</strong> {t('helpWelcome.imappostfächersynchronisierendirektantwo')}</li>
+        <li><strong>{t('helpWelcome.dateiendms')}</strong> {t('helpWelcome.dokumentehochladenteilenundverwalten')}</li>
+        <li><strong>KI-Assistent</strong> {t('helpWelcome.intelligentehilfebeiderarbeit')}</li>
+        <li><strong>Workflows</strong> {t('helpWelcome.automatisierteprozesse')}</li>
       </ul>
-      <h2 className="text-lg font-semibold text-secondary-800 mt-6 mb-2">Erste Schritte</h2>
+      <h2 className="text-lg font-semibold text-secondary-800 mt-6 mb-2">{t('helpWelcome.ersteschritte')}</h2>
       <ol className="list-decimal list-inside text-secondary-600 space-y-1">
-        <li>Melden Sie sich mit Ihren Zugangsdaten an</li>
-        <li>Wählen Sie einen Workspace auf der Startseite</li>
-        <li>Beginnen Sie mit dem Anlegen von Kontakten</li>
-        <li>Richten Sie Ihr E-Mail-Postfach unter Einstellungen → Email ein</li>
+        <li>{t('helpWelcome.meldensiesichmitihrenzugangsdaten')}</li>
+        <li>{t('helpWelcome.wählensieeinenworkspaceaufder')}</li>
+        <li>{t('helpWelcome.beginnensiemitdemanlegenvon')}</li>
+        <li>{t('helpWelcome.richtensieihremailpostfach')}</li>
       </ol>
       <div className="mt-6 p-4 bg-primary-50 rounded-lg border border-primary-200">
         <p className="text-sm text-primary-700">
-          💡 <strong>Tipp:</strong> Nutzen Sie die globale Suche (Lupe oben) oder das Kommando-Palette (Strg+K) um schnell zu finden was Sie brauchen.
+          💡 <strong>Tipp:</strong> {t('helpWelcome.nutzensiedieglobalesuchelupe')}
         </p>
       </div>
     </div>
diff --git a/frontend/src/pages/logs/LogsOverview.tsx b/frontend/src/pages/logs/LogsOverview.tsx
index fab39c1..578c03c 100644
--- a/frontend/src/pages/logs/LogsOverview.tsx
+++ b/frontend/src/pages/logs/LogsOverview.tsx
@@ -1,11 +1,13 @@
 import React from 'react';
+import { useTranslation } from 'react-i18next';
 
 export function LogsOverviewPage() {
+  const { t } = useTranslation();
   return (
     <div className="max-w-4xl mx-auto">
-      <h1 className="text-2xl font-bold text-secondary-900 mb-4">Logs Übersicht</h1>
+      <h1 className="text-2xl font-bold text-secondary-900 mb-4">{t('logsOverview.logsübersicht')}</h1>
       <p className="text-secondary-600 mb-6">
-        System- und Audit-Logs einsehen, filtern und exportieren.
+        {t('logsOverview.systemundauditlogseinsehenfiltern')}
       </p>
       <div className="grid grid-cols-1 md:grid-cols-3 gap-4">
         <div className="p-6 bg-white rounded-xl border border-secondary-200">
@@ -13,21 +15,21 @@ export function LogsOverviewPage() {
             <svg className="w-6 h-6 text-primary-600" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z" /></svg>
           </div>
           <h3 className="font-semibold text-secondary-900">Audit-Log</h3>
-          <p className="text-sm text-secondary-500 mt-1">Alle Änderungen nachverfolgen</p>
+          <p className="text-sm text-secondary-500 mt-1">{t('logsOverview.alleänderungennachverfolgen')}</p>
         </div>
         <div className="p-6 bg-white rounded-xl border border-secondary-200">
           <div className="w-12 h-12 bg-warning-100 rounded-lg flex items-center justify-center mb-3">
             <svg className="w-6 h-6 text-warning-600" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 9v2m0 4h.01m-6.938 4h13.856c1.54 0 2.502-1.667 1.732-3L13.732 4c-.77-1.333-2.694-1.333-3.464 0L3.34 16c-.77 1.333.192 3 1.732 3z" /></svg>
           </div>
           <h3 className="font-semibold text-secondary-900">System-Logs</h3>
-          <p className="text-sm text-secondary-500 mt-1">Container, Worker, Datenbank</p>
+          <p className="text-sm text-secondary-500 mt-1">{t('logsOverview.containerworkerdatenbank')}</p>
         </div>
         <div className="p-6 bg-white rounded-xl border border-secondary-200">
           <div className="w-12 h-12 bg-danger-100 rounded-lg flex items-center justify-center mb-3">
             <svg className="w-6 h-6 text-danger-600" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 8v4m0 4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z" /></svg>
           </div>
           <h3 className="font-semibold text-secondary-900">Fehler</h3>
-          <p className="text-sm text-secondary-500 mt-1">API- und Plugin-Fehler</p>
+          <p className="text-sm text-secondary-500 mt-1">{t('logsOverview.apiundpluginfehler')}</p>
         </div>
       </div>
     </div>
diff --git a/frontend/src/pages/logs/LogsPlaceholder.tsx b/frontend/src/pages/logs/LogsPlaceholder.tsx
index af9c89b..3a23c54 100644
--- a/frontend/src/pages/logs/LogsPlaceholder.tsx
+++ b/frontend/src/pages/logs/LogsPlaceholder.tsx
@@ -1,11 +1,13 @@
 import React from 'react';
+import { useTranslation } from 'react-i18next';
 
 export function LogsPlaceholderPage() {
+  const { t } = useTranslation();
   return (
     <div className="max-w-4xl mx-auto">
       <h1 className="text-2xl font-bold text-secondary-900 mb-4">Logs</h1>
       <p className="text-secondary-600">
-        Diese Seite wird gerade erstellt. Wählen Sie ein Thema aus dem Menü links.
+        {t('logsPlaceholder.dieseseitewirdgeradeerstelltwählen')}
       </p>
     </div>
   );
diff --git a/frontend/src/routes/index.tsx b/frontend/src/routes/index.tsx
index ae7b13d..74a3e51 100644
--- a/frontend/src/routes/index.tsx
+++ b/frontend/src/routes/index.tsx
@@ -13,6 +13,7 @@ import { PasswordResetConfirmPage } from '@/pages/PasswordResetConfirm';
 import { Loader2 } from 'lucide-react';
 import { PluginRouteRenderer } from '@/components/plugins/PluginRouteRenderer';
 import { ErrorBoundary } from '@/components/common/ErrorBoundary';
+import { useTranslation } from 'react-i18next';
 
 // Lazy-loaded pages (code-splitting)
 const DashboardPage = React.lazy(() => import('@/pages/Dashboard').then(m => ({ default: m.DashboardPage })));
@@ -91,8 +92,9 @@ const SystemDashboardPage = React.lazy(() => import('@/pages/SystemDashboard').t
 
 /** Centered spinner fallback for lazy-loaded routes */
 function PageLoader() {
+  const { t } = useTranslation();
   return (
-    <div className="flex items-center justify-center min-h-[50vh]" role="status" aria-label="Seite wird geladen">
+    <div className="flex items-center justify-center min-h-[50vh]" role="status" aria-label={t('index.seitewirdgeladen')}>
       <Loader2 className="animate-spin h-8 w-8 text-primary-500" aria-hidden="true" />
     </div>
   );