diff --git a/src/app/_components/AuthModal.tsx b/src/app/_components/AuthModal.tsx
index 271509f..8ac0aa9 100644
--- a/src/app/_components/AuthModal.tsx
+++ b/src/app/_components/AuthModal.tsx
@@ -6,12 +6,14 @@ import { Input } from './ui/input';
 import { useAuth } from './AuthProvider';
 import { Lock, User, AlertCircle } from 'lucide-react';
 import { useRegisterModal } from './modal/ModalStackProvider';
+import { useTranslation } from '@/lib/i18n/useTranslation';
 
 interface AuthModalProps {
   isOpen: boolean;
 }
 
 export function AuthModal({ isOpen }: AuthModalProps) {
+  const { t } = useTranslation('authModal');
   useRegisterModal(isOpen, { id: 'auth-modal', allowEscape: false, onClose: () => null });
   const { login } = useAuth();
   const [username, setUsername] = useState('');
@@ -27,7 +29,7 @@ export function AuthModal({ isOpen }: AuthModalProps) {
     const success = await login(username, password);
     
     if (!success) {
-      setError('Invalid username or password');
+      setError(t('error'));
     }
     
     setIsLoading(false);
@@ -42,27 +44,27 @@ export function AuthModal({ isOpen }: AuthModalProps) {
         <div className="flex items-center justify-center p-6 border-b border-border">
           <div className="flex items-center gap-3">
             <Lock className="h-8 w-8 text-primary" />
-            <h2 className="text-2xl font-bold text-card-foreground">Authentication Required</h2>
+            <h2 className="text-2xl font-bold text-card-foreground">{t('title')}</h2>
           </div>
         </div>
 
         {/* Content */}
         <div className="p-6">
           <p className="text-muted-foreground text-center mb-6">
-            Please enter your credentials to access the application.
+            {t('description')}
           </p>
 
           <form onSubmit={handleSubmit} className="space-y-4">
             <div>
               <label htmlFor="username" className="block text-sm font-medium text-foreground mb-2">
-                Username
+                {t('username.label')}
               </label>
               <div className="relative">
                 <User className="absolute left-3 top-1/2 transform -translate-y-1/2 h-4 w-4 text-muted-foreground" />
                 <Input
                   id="username"
                   type="text"
-                  placeholder="Enter your username"
+                  placeholder={t('username.placeholder')}
                   value={username}
                   onChange={(e) => setUsername(e.target.value)}
                   disabled={isLoading}
@@ -74,14 +76,14 @@ export function AuthModal({ isOpen }: AuthModalProps) {
 
             <div>
               <label htmlFor="password" className="block text-sm font-medium text-foreground mb-2">
-                Password
+                {t('password.label')}
               </label>
               <div className="relative">
                 <Lock className="absolute left-3 top-1/2 transform -translate-y-1/2 h-4 w-4 text-muted-foreground" />
                 <Input
                   id="password"
                   type="password"
-                  placeholder="Enter your password"
+                  placeholder={t('password.placeholder')}
                   value={password}
                   onChange={(e) => setPassword(e.target.value)}
                   disabled={isLoading}
@@ -103,7 +105,7 @@ export function AuthModal({ isOpen }: AuthModalProps) {
               disabled={isLoading || !username.trim() || !password.trim()}
               className="w-full"
             >
-              {isLoading ? 'Signing In...' : 'Sign In'}
+              {isLoading ? t('actions.signingIn') : t('actions.signIn')}
             </Button>
           </form>
         </div>
diff --git a/src/app/_components/LoadingModal.tsx b/src/app/_components/LoadingModal.tsx
index 00d57ac..8b7ffbe 100644
--- a/src/app/_components/LoadingModal.tsx
+++ b/src/app/_components/LoadingModal.tsx
@@ -2,6 +2,7 @@
 
 import { Loader2 } from 'lucide-react';
 import { useRegisterModal } from './modal/ModalStackProvider';
+import { useTranslation } from '@/lib/i18n/useTranslation';
 
 interface LoadingModalProps {
   isOpen: boolean;
@@ -9,6 +10,7 @@ interface LoadingModalProps {
 }
 
 export function LoadingModal({ isOpen, action }: LoadingModalProps) {
+  const { t } = useTranslation('loadingModal');
   useRegisterModal(isOpen, { id: 'loading-modal', allowEscape: false, onClose: () => null });
   if (!isOpen) return null;
 
@@ -22,13 +24,13 @@ export function LoadingModal({ isOpen, action }: LoadingModalProps) {
           </div>
           <div className="text-center">
             <h3 className="text-lg font-semibold text-card-foreground mb-2">
-              Processing
+              {t('processing')}
             </h3>
             <p className="text-sm text-muted-foreground">
               {action}
             </p>
             <p className="text-xs text-muted-foreground mt-2">
-              Please wait...
+              {t('pleaseWait')}
             </p>
           </div>
         </div>
diff --git a/src/app/_components/SetupModal.tsx b/src/app/_components/SetupModal.tsx
index 77fd59e..4b5f150 100644
--- a/src/app/_components/SetupModal.tsx
+++ b/src/app/_components/SetupModal.tsx
@@ -6,6 +6,7 @@ import { Input } from './ui/input';
 import { Toggle } from './ui/toggle';
 import { Lock, User, Shield, AlertCircle } from 'lucide-react';
 import { useRegisterModal } from './modal/ModalStackProvider';
+import { useTranslation } from '@/lib/i18n/useTranslation';
 
 interface SetupModalProps {
   isOpen: boolean;
@@ -13,6 +14,7 @@ interface SetupModalProps {
 }
 
 export function SetupModal({ isOpen, onComplete }: SetupModalProps) {
+  const { t } = useTranslation('setupModal');
   useRegisterModal(isOpen, { id: 'setup-modal', allowEscape: true, onClose: () => null });
   const [username, setUsername] = useState('');
   const [password, setPassword] = useState('');
@@ -28,7 +30,7 @@ export function SetupModal({ isOpen, onComplete }: SetupModalProps) {
 
     // Only validate passwords if authentication is enabled
     if (enableAuth && password !== confirmPassword) {
-      setError('Passwords do not match');
+      setError(t('errors.passwordMismatch'));
       setIsLoading(false);
       return;
     }
@@ -71,11 +73,11 @@ export function SetupModal({ isOpen, onComplete }: SetupModalProps) {
         }
       } else {
         const errorData = await response.json() as { error: string };
-        setError(errorData.error ?? 'Failed to setup authentication');
+        setError(errorData.error ?? t('errors.setupFailed'));
       }
     } catch (error) {
       console.error('Setup error:', error);
-      setError('Failed to setup authentication');
+      setError(t('errors.setupFailed'));
     }
     
     setIsLoading(false);
@@ -90,27 +92,27 @@ export function SetupModal({ isOpen, onComplete }: SetupModalProps) {
         <div className="flex items-center justify-center p-6 border-b border-border">
           <div className="flex items-center gap-3">
             <Shield className="h-8 w-8 text-success" />
-            <h2 className="text-2xl font-bold text-card-foreground">Setup Authentication</h2>
+            <h2 className="text-2xl font-bold text-card-foreground">{t('title')}</h2>
           </div>
         </div>
 
         {/* Content */}
         <div className="p-6">
           <p className="text-muted-foreground text-center mb-6">
-            Set up authentication to secure your application. This will be required for future access.
+            {t('description')}
           </p>
 
           <form onSubmit={handleSubmit} className="space-y-4">
             <div>
               <label htmlFor="setup-username" className="block text-sm font-medium text-foreground mb-2">
-                Username
+                {t('username.label')}
               </label>
               <div className="relative">
                 <User className="absolute left-3 top-1/2 transform -translate-y-1/2 h-4 w-4 text-muted-foreground" />
                         <Input
                           id="setup-username"
                           type="text"
-                          placeholder="Choose a username"
+                          placeholder={t('username.placeholder')}
                           value={username}
                           onChange={(e) => setUsername(e.target.value)}
                           disabled={isLoading}
@@ -123,14 +125,14 @@ export function SetupModal({ isOpen, onComplete }: SetupModalProps) {
 
             <div>
               <label htmlFor="setup-password" className="block text-sm font-medium text-foreground mb-2">
-                Password
+                {t('password.label')}
               </label>
               <div className="relative">
                 <Lock className="absolute left-3 top-1/2 transform -translate-y-1/2 h-4 w-4 text-muted-foreground" />
                         <Input
                           id="setup-password"
                           type="password"
-                          placeholder="Choose a password"
+                          placeholder={t('password.placeholder')}
                           value={password}
                           onChange={(e) => setPassword(e.target.value)}
                           disabled={isLoading}
@@ -143,14 +145,14 @@ export function SetupModal({ isOpen, onComplete }: SetupModalProps) {
 
             <div>
               <label htmlFor="confirm-password" className="block text-sm font-medium text-foreground mb-2">
-                Confirm Password
+                {t('confirmPassword.label')}
               </label>
               <div className="relative">
                 <Lock className="absolute left-3 top-1/2 transform -translate-y-1/2 h-4 w-4 text-muted-foreground" />
                         <Input
                           id="confirm-password"
                           type="password"
-                          placeholder="Confirm your password"
+                          placeholder={t('confirmPassword.placeholder')}
                           value={confirmPassword}
                           onChange={(e) => setConfirmPassword(e.target.value)}
                           disabled={isLoading}
@@ -164,11 +166,11 @@ export function SetupModal({ isOpen, onComplete }: SetupModalProps) {
             <div className="p-4 border border-border rounded-lg bg-muted/30">
               <div className="flex items-center justify-between">
                 <div>
-                  <h4 className="font-medium text-foreground mb-1">Enable Authentication</h4>
+                  <h4 className="font-medium text-foreground mb-1">{t('enableAuth.title')}</h4>
                   <p className="text-sm text-muted-foreground">
                     {enableAuth 
-                      ? 'Authentication will be required on every page load'
-                      : 'Authentication will be optional (can be enabled later in settings)'
+                      ? t('enableAuth.descriptionEnabled')
+                      : t('enableAuth.descriptionDisabled')
                     }
                   </p>
                 </div>
@@ -176,7 +178,7 @@ export function SetupModal({ isOpen, onComplete }: SetupModalProps) {
                   checked={enableAuth}
                   onCheckedChange={setEnableAuth}
                   disabled={isLoading}
-                  label="Enable authentication"
+                  label={t('enableAuth.label')}
                 />
               </div>
             </div>
@@ -196,7 +198,7 @@ export function SetupModal({ isOpen, onComplete }: SetupModalProps) {
               }
               className="w-full"
             >
-              {isLoading ? 'Setting Up...' : 'Complete Setup'}
+              {isLoading ? t('actions.settingUp') : t('actions.completeSetup')}
             </Button>
           </form>
         </div>
diff --git a/src/lib/i18n/messages/de.ts b/src/lib/i18n/messages/de.ts
index f8c89ff..a6d5945 100644
--- a/src/lib/i18n/messages/de.ts
+++ b/src/lib/i18n/messages/de.ts
@@ -64,6 +64,57 @@ export const deMessages: NestedMessages = {
       serverBackOnline: 'Server ist wieder online! Seite wird neu geladen...',
     },
   },
+  loadingModal: {
+    processing: 'Verarbeite',
+    pleaseWait: 'Bitte warten...',
+  },
+  authModal: {
+    title: 'Authentifizierung erforderlich',
+    description: 'Bitte geben Sie Ihre Anmeldedaten ein, um auf die Anwendung zuzugreifen.',
+    username: {
+      label: 'Benutzername',
+      placeholder: 'Benutzername eingeben',
+    },
+    password: {
+      label: 'Passwort',
+      placeholder: 'Passwort eingeben',
+    },
+    error: 'Ungültiger Benutzername oder Passwort',
+    actions: {
+      signIn: 'Anmelden',
+      signingIn: 'Anmeldung läuft...',
+    },
+  },
+  setupModal: {
+    title: 'Authentifizierung einrichten',
+    description: 'Richten Sie die Authentifizierung ein, um Ihre Anwendung zu sichern. Diese wird für zukünftige Zugriffe erforderlich sein.',
+    username: {
+      label: 'Benutzername',
+      placeholder: 'Wählen Sie einen Benutzernamen',
+    },
+    password: {
+      label: 'Passwort',
+      placeholder: 'Wählen Sie ein Passwort',
+    },
+    confirmPassword: {
+      label: 'Passwort bestätigen',
+      placeholder: 'Bestätigen Sie Ihr Passwort',
+    },
+    enableAuth: {
+      title: 'Authentifizierung aktivieren',
+      descriptionEnabled: 'Authentifizierung wird bei jedem Seitenladevorgang erforderlich sein',
+      descriptionDisabled: 'Authentifizierung wird optional sein (kann später in den Einstellungen aktiviert werden)',
+      label: 'Authentifizierung aktivieren',
+    },
+    errors: {
+      passwordMismatch: 'Passwörter stimmen nicht überein',
+      setupFailed: 'Fehler beim Einrichten der Authentifizierung',
+    },
+    actions: {
+      completeSetup: 'Einrichtung abschließen',
+      settingUp: 'Wird eingerichtet...',
+    },
+  },
   layout: {
     title: 'PVE Skriptverwaltung',
     tagline: 'Verwalte und starte lokale Proxmox-Hilfsskripte mit Live-Ausgabe',
diff --git a/src/lib/i18n/messages/en.ts b/src/lib/i18n/messages/en.ts
index 0415632..ca2edf3 100644
--- a/src/lib/i18n/messages/en.ts
+++ b/src/lib/i18n/messages/en.ts
@@ -298,4 +298,55 @@ export const enMessages: NestedMessages = {
       passwordMismatch: 'Passwords do not match',
     },
   },
+  loadingModal: {
+    processing: 'Processing',
+    pleaseWait: 'Please wait...',
+  },
+  authModal: {
+    title: 'Authentication Required',
+    description: 'Please enter your credentials to access the application.',
+    username: {
+      label: 'Username',
+      placeholder: 'Enter your username',
+    },
+    password: {
+      label: 'Password',
+      placeholder: 'Enter your password',
+    },
+    error: 'Invalid username or password',
+    actions: {
+      signIn: 'Sign In',
+      signingIn: 'Signing In...',
+    },
+  },
+  setupModal: {
+    title: 'Setup Authentication',
+    description: 'Set up authentication to secure your application. This will be required for future access.',
+    username: {
+      label: 'Username',
+      placeholder: 'Choose a username',
+    },
+    password: {
+      label: 'Password',
+      placeholder: 'Choose a password',
+    },
+    confirmPassword: {
+      label: 'Confirm Password',
+      placeholder: 'Confirm your password',
+    },
+    enableAuth: {
+      title: 'Enable Authentication',
+      descriptionEnabled: 'Authentication will be required on every page load',
+      descriptionDisabled: 'Authentication will be optional (can be enabled later in settings)',
+      label: 'Enable authentication',
+    },
+    errors: {
+      passwordMismatch: 'Passwords do not match',
+      setupFailed: 'Failed to setup authentication',
+    },
+    actions: {
+      completeSetup: 'Complete Setup',
+      settingUp: 'Setting Up...',
+    },
+  },
 };