From eab69c512cc4a42d522273ca5f26ba963fd5d2d5 Mon Sep 17 00:00:00 2001
From: Till-JS <101404291+Till-JS@users.noreply.github.com>
Date: Sun, 30 Nov 2025 00:28:14 +0100
Subject: [PATCH] feat(i18n): add language picker and 5-language support to all
 auth screens
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

- Add svelte-i18n and @manacore/shared-i18n to Chat, Presi, Zitare
- Create LanguageSelector component for each app
- Add locale files for DE, EN, IT, FR, ES in all apps
- Update auth pages (login, register, forgot-password) to use shared translations
- Add headerControls snippet to RegisterPage and ForgotPasswordPage
- Export ZitareLogo and NutriPhiLogo from shared-branding

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
---
 apps/chat/apps/web/package.json               |  3 +-
 .../lib/components/LanguageSelector.svelte    | 20 +++++++
 apps/chat/apps/web/src/lib/i18n/index.ts      | 52 +++++++++++++++++++
 .../apps/web/src/lib/i18n/locales/de.json     | 13 +++++
 .../apps/web/src/lib/i18n/locales/en.json     | 13 +++++
 .../apps/web/src/lib/i18n/locales/es.json     | 13 +++++
 .../apps/web/src/lib/i18n/locales/fr.json     | 13 +++++
 .../apps/web/src/lib/i18n/locales/it.json     | 13 +++++
 .../(auth)/forgot-password/+page.svelte       | 27 ++++------
 .../web/src/routes/(auth)/login/+page.svelte  | 36 ++++---------
 .../src/routes/(auth)/register/+page.svelte   | 34 ++++--------
 apps/picture/apps/web/src/lib/i18n/index.ts   |  5 +-
 .../apps/web/src/lib/i18n/locales/es.json     | 23 ++++++++
 .../apps/web/src/lib/i18n/locales/fr.json     | 23 ++++++++
 .../apps/web/src/lib/i18n/locales/it.json     | 23 ++++++++
 apps/presi/apps/web/package.json              |  4 +-
 .../lib/components/LanguageSelector.svelte    | 20 +++++++
 apps/presi/apps/web/src/lib/i18n/index.ts     | 52 +++++++++++++++++++
 .../apps/web/src/lib/i18n/locales/de.json     | 13 +++++
 .../apps/web/src/lib/i18n/locales/en.json     | 13 +++++
 .../apps/web/src/lib/i18n/locales/es.json     | 13 +++++
 .../apps/web/src/lib/i18n/locales/fr.json     | 13 +++++
 .../apps/web/src/lib/i18n/locales/it.json     | 13 +++++
 .../src/routes/forgot-password/+page.svelte   | 25 ++++-----
 .../apps/web/src/routes/login/+page.svelte    | 36 ++++---------
 .../apps/web/src/routes/register/+page.svelte | 34 ++++--------
 apps/zitare/apps/web/package.json             |  4 +-
 .../lib/components/LanguageSelector.svelte    | 20 +++++++
 apps/zitare/apps/web/src/lib/i18n/index.ts    | 52 +++++++++++++++++++
 .../apps/web/src/lib/i18n/locales/de.json     | 13 +++++
 .../apps/web/src/lib/i18n/locales/en.json     | 13 +++++
 .../apps/web/src/lib/i18n/locales/es.json     | 13 +++++
 .../apps/web/src/lib/i18n/locales/fr.json     | 13 +++++
 .../apps/web/src/lib/i18n/locales/it.json     | 13 +++++
 .../(auth)/forgot-password/+page.svelte       | 15 +++++-
 .../web/src/routes/(auth)/login/+page.svelte  | 15 +++++-
 .../src/routes/(auth)/register/+page.svelte   | 15 +++++-
 .../src/pages/ForgotPasswordPage.svelte       |  9 ++++
 .../src/pages/RegisterPage.svelte             |  9 ++++
 packages/shared-branding/src/index.ts         |  2 +
 pnpm-lock.yaml                                | 15 ++++++
 41 files changed, 626 insertions(+), 142 deletions(-)
 create mode 100644 apps/chat/apps/web/src/lib/components/LanguageSelector.svelte
 create mode 100644 apps/chat/apps/web/src/lib/i18n/index.ts
 create mode 100644 apps/chat/apps/web/src/lib/i18n/locales/de.json
 create mode 100644 apps/chat/apps/web/src/lib/i18n/locales/en.json
 create mode 100644 apps/chat/apps/web/src/lib/i18n/locales/es.json
 create mode 100644 apps/chat/apps/web/src/lib/i18n/locales/fr.json
 create mode 100644 apps/chat/apps/web/src/lib/i18n/locales/it.json
 create mode 100644 apps/picture/apps/web/src/lib/i18n/locales/es.json
 create mode 100644 apps/picture/apps/web/src/lib/i18n/locales/fr.json
 create mode 100644 apps/picture/apps/web/src/lib/i18n/locales/it.json
 create mode 100644 apps/presi/apps/web/src/lib/components/LanguageSelector.svelte
 create mode 100644 apps/presi/apps/web/src/lib/i18n/index.ts
 create mode 100644 apps/presi/apps/web/src/lib/i18n/locales/de.json
 create mode 100644 apps/presi/apps/web/src/lib/i18n/locales/en.json
 create mode 100644 apps/presi/apps/web/src/lib/i18n/locales/es.json
 create mode 100644 apps/presi/apps/web/src/lib/i18n/locales/fr.json
 create mode 100644 apps/presi/apps/web/src/lib/i18n/locales/it.json
 create mode 100644 apps/zitare/apps/web/src/lib/components/LanguageSelector.svelte
 create mode 100644 apps/zitare/apps/web/src/lib/i18n/index.ts
 create mode 100644 apps/zitare/apps/web/src/lib/i18n/locales/de.json
 create mode 100644 apps/zitare/apps/web/src/lib/i18n/locales/en.json
 create mode 100644 apps/zitare/apps/web/src/lib/i18n/locales/es.json
 create mode 100644 apps/zitare/apps/web/src/lib/i18n/locales/fr.json
 create mode 100644 apps/zitare/apps/web/src/lib/i18n/locales/it.json

diff --git a/apps/chat/apps/web/package.json b/apps/chat/apps/web/package.json
index f02d0eec0..66f3ded4e 100644
--- a/apps/chat/apps/web/package.json
+++ b/apps/chat/apps/web/package.json
@@ -42,6 +42,7 @@
 		"@manacore/shared-profile-ui": "workspace:*",
 		"@manacore/shared-ui": "workspace:*",
 		"@manacore/shared-utils": "workspace:*",
-		"marked": "^17.0.0"
+		"marked": "^17.0.0",
+		"svelte-i18n": "^4.0.1"
 	}
 }
diff --git a/apps/chat/apps/web/src/lib/components/LanguageSelector.svelte b/apps/chat/apps/web/src/lib/components/LanguageSelector.svelte
new file mode 100644
index 000000000..8b7cd2b55
--- /dev/null
+++ b/apps/chat/apps/web/src/lib/components/LanguageSelector.svelte
@@ -0,0 +1,20 @@
+<script lang="ts">
+	import { locale } from 'svelte-i18n';
+	import { LanguageSelector } from '@manacore/shared-i18n';
+	import { setLocale, supportedLocales } from '$lib/i18n';
+	import { theme } from '$lib/stores/theme';
+
+	let currentLocale = $derived($locale || 'de');
+
+	function handleLocaleChange(newLocale: string) {
+		setLocale(newLocale as any);
+	}
+</script>
+
+<LanguageSelector
+	{currentLocale}
+	{supportedLocales}
+	onLocaleChange={handleLocaleChange}
+	isDark={theme.isDark}
+	primaryColor="#0ea5e9"
+/>
diff --git a/apps/chat/apps/web/src/lib/i18n/index.ts b/apps/chat/apps/web/src/lib/i18n/index.ts
new file mode 100644
index 000000000..7634ae4ad
--- /dev/null
+++ b/apps/chat/apps/web/src/lib/i18n/index.ts
@@ -0,0 +1,52 @@
+import { browser } from '$app/environment';
+import { init, register, locale, waitLocale } from 'svelte-i18n';
+
+// List of supported locales
+export const supportedLocales = ['de', 'en', 'it', 'fr', 'es'] as const;
+export type SupportedLocale = (typeof supportedLocales)[number];
+
+// Default locale
+const defaultLocale = 'de';
+
+// Register all available locales
+register('de', () => import('./locales/de.json'));
+register('en', () => import('./locales/en.json'));
+register('it', () => import('./locales/it.json'));
+register('fr', () => import('./locales/fr.json'));
+register('es', () => import('./locales/es.json'));
+
+// Get initial locale from browser or localStorage
+function getInitialLocale(): SupportedLocale {
+	if (browser) {
+		// Check localStorage first
+		const stored = localStorage.getItem('chat_locale');
+		if (stored && supportedLocales.includes(stored as SupportedLocale)) {
+			return stored as SupportedLocale;
+		}
+
+		// Fall back to browser language
+		const browserLang = navigator.language.split('-')[0];
+		if (supportedLocales.includes(browserLang as SupportedLocale)) {
+			return browserLang as SupportedLocale;
+		}
+	}
+
+	return defaultLocale;
+}
+
+// Initialize i18n at module scope (required for SSR)
+init({
+	fallbackLocale: defaultLocale,
+	initialLocale: getInitialLocale(),
+});
+
+// Set locale and persist to localStorage
+export function setLocale(newLocale: SupportedLocale) {
+	locale.set(newLocale);
+	if (browser) {
+		localStorage.setItem('chat_locale', newLocale);
+	}
+}
+
+// Wait for locale to be loaded (useful for SSR)
+export { waitLocale };
diff --git a/apps/chat/apps/web/src/lib/i18n/locales/de.json b/apps/chat/apps/web/src/lib/i18n/locales/de.json
new file mode 100644
index 000000000..a34ffac83
--- /dev/null
+++ b/apps/chat/apps/web/src/lib/i18n/locales/de.json
@@ -0,0 +1,13 @@
+{
+	"app_slider": {
+		"title": "Weitere Manacore Apps",
+		"memoro_desc": "KI-gestützte Sprachmemos",
+		"maerchenzauber_desc": "Magische Gute-Nacht-Geschichten",
+		"manadeck_desc": "KI Lernkarten",
+		"picture_desc": "KI Bildgenerierung",
+		"moodlit_desc": "Dein Stimmungsbegleiter",
+		"manacore_desc": "KI-Produktivitätssuite",
+		"coming_soon": "Demnächst",
+		"download": "Download"
+	}
+}
diff --git a/apps/chat/apps/web/src/lib/i18n/locales/en.json b/apps/chat/apps/web/src/lib/i18n/locales/en.json
new file mode 100644
index 000000000..de8951cf7
--- /dev/null
+++ b/apps/chat/apps/web/src/lib/i18n/locales/en.json
@@ -0,0 +1,13 @@
+{
+	"app_slider": {
+		"title": "More Manacore Apps",
+		"memoro_desc": "AI-powered voice memos",
+		"maerchenzauber_desc": "Magical bedtime stories",
+		"manadeck_desc": "AI flashcards",
+		"picture_desc": "AI image generation",
+		"moodlit_desc": "Your mood companion",
+		"manacore_desc": "AI productivity suite",
+		"coming_soon": "Coming soon",
+		"download": "Download"
+	}
+}
diff --git a/apps/chat/apps/web/src/lib/i18n/locales/es.json b/apps/chat/apps/web/src/lib/i18n/locales/es.json
new file mode 100644
index 000000000..381a82335
--- /dev/null
+++ b/apps/chat/apps/web/src/lib/i18n/locales/es.json
@@ -0,0 +1,13 @@
+{
+	"app_slider": {
+		"title": "Más Apps de Manacore",
+		"memoro_desc": "Notas de voz con IA",
+		"maerchenzauber_desc": "Cuentos mágicos para dormir",
+		"manadeck_desc": "Flashcards con IA",
+		"picture_desc": "Generación de imágenes con IA",
+		"moodlit_desc": "Tu compañero de ánimo",
+		"manacore_desc": "Suite de productividad IA",
+		"coming_soon": "Próximamente",
+		"download": "Descargar"
+	}
+}
diff --git a/apps/chat/apps/web/src/lib/i18n/locales/fr.json b/apps/chat/apps/web/src/lib/i18n/locales/fr.json
new file mode 100644
index 000000000..756dd891c
--- /dev/null
+++ b/apps/chat/apps/web/src/lib/i18n/locales/fr.json
@@ -0,0 +1,13 @@
+{
+	"app_slider": {
+		"title": "Autres Apps Manacore",
+		"memoro_desc": "Mémos vocaux avec IA",
+		"maerchenzauber_desc": "Histoires magiques du soir",
+		"manadeck_desc": "Flashcards avec IA",
+		"picture_desc": "Génération d'images avec IA",
+		"moodlit_desc": "Ton compagnon d'humeur",
+		"manacore_desc": "Suite de productivité IA",
+		"coming_soon": "Bientôt disponible",
+		"download": "Télécharger"
+	}
+}
diff --git a/apps/chat/apps/web/src/lib/i18n/locales/it.json b/apps/chat/apps/web/src/lib/i18n/locales/it.json
new file mode 100644
index 000000000..223bf728e
--- /dev/null
+++ b/apps/chat/apps/web/src/lib/i18n/locales/it.json
@@ -0,0 +1,13 @@
+{
+	"app_slider": {
+		"title": "Altre App Manacore",
+		"memoro_desc": "Memo vocali con IA",
+		"maerchenzauber_desc": "Storie magiche della buonanotte",
+		"manadeck_desc": "Flashcard con IA",
+		"picture_desc": "Generazione immagini con IA",
+		"moodlit_desc": "Il tuo compagno d'umore",
+		"manacore_desc": "Suite di produttività IA",
+		"coming_soon": "Prossimamente",
+		"download": "Scarica"
+	}
+}
diff --git a/apps/chat/apps/web/src/routes/(auth)/forgot-password/+page.svelte b/apps/chat/apps/web/src/routes/(auth)/forgot-password/+page.svelte
index 3283aa3a8..7d651cdc1 100644
--- a/apps/chat/apps/web/src/routes/(auth)/forgot-password/+page.svelte
+++ b/apps/chat/apps/web/src/routes/(auth)/forgot-password/+page.svelte
@@ -1,26 +1,16 @@
 <script lang="ts">
 	import { goto } from '$app/navigation';
+	import { locale } from 'svelte-i18n';
 	import { ForgotPasswordPage } from '@manacore/shared-auth-ui';
+	import { getForgotPasswordTranslations } from '@manacore/shared-i18n';
 	import { ChatLogo } from '@manacore/shared-branding';
 	import { authStore } from '$lib/stores/auth.svelte';
 	import AppSlider from '$lib/components/AppSlider.svelte';
+	import LanguageSelector from '$lib/components/LanguageSelector.svelte';
+	import '$lib/i18n';
 
-	// German translations
-	const translations = {
-		titleForm: 'Passwort zurücksetzen',
-		titleSuccess: 'E-Mail gesendet',
-		description:
-			'Gib deine E-Mail-Adresse ein und wir senden dir einen Link zum Zurücksetzen deines Passworts.',
-		emailPlaceholder: 'E-Mail',
-		sendResetLinkButton: 'Link senden',
-		sending: 'Wird gesendet...',
-		backToLogin: 'Zurück zur Anmeldung',
-		resendEmail: 'E-Mail erneut senden',
-		successMessage:
-			'Wir haben einen Link zum Zurücksetzen deines Passworts an {email} gesendet. Bitte überprüfe deinen Posteingang.',
-		emailRequired: 'E-Mail ist erforderlich',
-		sendFailed: 'Fehler beim Senden der E-Mail',
-	};
+	// Get translations based on current locale
+	const translations = $derived(getForgotPasswordTranslations($locale || 'de'));
 
 	async function handleForgotPassword(email: string) {
 		return authStore.resetPassword(email);
@@ -28,7 +18,7 @@
 </script>
 
 <svelte:head>
-	<title>Passwort zurücksetzen | ManaChat</title>
+	<title>{translations.titleForm} | ManaChat</title>
 </svelte:head>
 
 <ForgotPasswordPage
@@ -42,6 +32,9 @@
 	darkBackground="#0c1929"
 	{translations}
 >
+	{#snippet headerControls()}
+		<LanguageSelector />
+	{/snippet}
 	{#snippet appSlider()}
 		<AppSlider />
 	{/snippet}
diff --git a/apps/chat/apps/web/src/routes/(auth)/login/+page.svelte b/apps/chat/apps/web/src/routes/(auth)/login/+page.svelte
index e8c5718c0..74e946977 100644
--- a/apps/chat/apps/web/src/routes/(auth)/login/+page.svelte
+++ b/apps/chat/apps/web/src/routes/(auth)/login/+page.svelte
@@ -1,39 +1,20 @@
 <script lang="ts">
 	import { goto } from '$app/navigation';
 	import { page } from '$app/stores';
+	import { locale } from 'svelte-i18n';
 	import { LoginPage } from '@manacore/shared-auth-ui';
+	import { getLoginTranslations } from '@manacore/shared-i18n';
 	import { ChatLogo } from '@manacore/shared-branding';
 	import { authStore } from '$lib/stores/auth.svelte';
 	import AppSlider from '$lib/components/AppSlider.svelte';
+	import LanguageSelector from '$lib/components/LanguageSelector.svelte';
+	import '$lib/i18n';
 
 	// Get redirect URL from query params
 	const redirectTo = $derived($page.url.searchParams.get('redirectTo') || '/chat');
 
-	// German translations
-	const translations = {
-		title: 'Anmelden',
-		subtitle: 'Melde dich mit deinem Konto an',
-		emailPlaceholder: 'E-Mail',
-		passwordPlaceholder: 'Passwort',
-		rememberMe: 'Angemeldet bleiben',
-		forgotPassword: 'Passwort vergessen?',
-		signInButton: 'Anmelden',
-		signingIn: 'Wird angemeldet...',
-		success: 'Erfolgreich!',
-		orDivider: 'oder',
-		noAccount: 'Noch kein Konto?',
-		createAccount: 'Jetzt registrieren',
-		skipToForm: 'Zum Login-Formular springen',
-		showPassword: 'Passwort anzeigen',
-		hidePassword: 'Passwort verbergen',
-		emailRequired: 'E-Mail ist erforderlich',
-		emailInvalid: 'Bitte gib eine gültige E-Mail-Adresse ein',
-		passwordRequired: 'Passwort ist erforderlich',
-		signInFailed: 'Anmeldung fehlgeschlagen',
-		googleSignInFailed: 'Google-Anmeldung fehlgeschlagen',
-		signInSuccess: 'Erfolgreich angemeldet. Weiterleitung...',
-		googleSignInSuccess: 'Erfolgreich mit Google angemeldet. Weiterleitung...',
-	};
+	// Get translations based on current locale
+	const translations = $derived(getLoginTranslations($locale || 'de'));
 
 	async function handleSignIn(email: string, password: string) {
 		return authStore.signIn(email, password);
@@ -41,7 +22,7 @@
 </script>
 
 <svelte:head>
-	<title>Anmelden | ManaChat</title>
+	<title>{translations.title} | ManaChat</title>
 </svelte:head>
 
 <LoginPage
@@ -59,6 +40,9 @@
 	darkBackground="#0c1929"
 	{translations}
 >
+	{#snippet headerControls()}
+		<LanguageSelector />
+	{/snippet}
 	{#snippet appSlider()}
 		<AppSlider />
 	{/snippet}
diff --git a/apps/chat/apps/web/src/routes/(auth)/register/+page.svelte b/apps/chat/apps/web/src/routes/(auth)/register/+page.svelte
index 4761a09bd..35dc40839 100644
--- a/apps/chat/apps/web/src/routes/(auth)/register/+page.svelte
+++ b/apps/chat/apps/web/src/routes/(auth)/register/+page.svelte
@@ -1,33 +1,16 @@
 <script lang="ts">
 	import { goto } from '$app/navigation';
+	import { locale } from 'svelte-i18n';
 	import { RegisterPage } from '@manacore/shared-auth-ui';
+	import { getRegisterTranslations } from '@manacore/shared-i18n';
 	import { ChatLogo } from '@manacore/shared-branding';
 	import { authStore } from '$lib/stores/auth.svelte';
 	import AppSlider from '$lib/components/AppSlider.svelte';
+	import LanguageSelector from '$lib/components/LanguageSelector.svelte';
+	import '$lib/i18n';
 
-	// German translations
-	const translations = {
-		title: 'Konto erstellen',
-		emailPlaceholder: 'E-Mail',
-		passwordPlaceholder: 'Passwort',
-		confirmPasswordPlaceholder: 'Passwort bestätigen',
-		passwordRequirements:
-			'Passwort muss mindestens 8 Zeichen mit Kleinbuchstaben, Großbuchstaben, Zahl und Sonderzeichen enthalten.',
-		createAccountButton: 'Konto erstellen',
-		creatingAccount: 'Wird erstellt...',
-		backToLogin: 'Zurück zur Anmeldung',
-		showPassword: 'Passwort anzeigen',
-		hidePassword: 'Passwort verbergen',
-		emailRequired: 'E-Mail ist erforderlich',
-		passwordRequired: 'Passwort ist erforderlich',
-		confirmPasswordRequired: 'Bitte bestätige dein Passwort',
-		passwordsDoNotMatch: 'Passwörter stimmen nicht überein',
-		passwordTooShort: 'Passwort muss mindestens 8 Zeichen lang sein',
-		passwordStrengthError:
-			'Passwort muss Kleinbuchstaben, Großbuchstaben, Zahl und Sonderzeichen enthalten',
-		registrationFailed: 'Registrierung fehlgeschlagen',
-		accountCreated: 'Konto erstellt! Bitte überprüfe deine E-Mails zur Bestätigung.',
-	};
+	// Get translations based on current locale
+	const translations = $derived(getRegisterTranslations($locale || 'de'));
 
 	async function handleSignUp(email: string, password: string) {
 		return authStore.signUp(email, password);
@@ -35,7 +18,7 @@
 </script>
 
 <svelte:head>
-	<title>Registrieren | ManaChat</title>
+	<title>{translations.title} | ManaChat</title>
 </svelte:head>
 
 <RegisterPage
@@ -50,6 +33,9 @@
 	darkBackground="#0c1929"
 	{translations}
 >
+	{#snippet headerControls()}
+		<LanguageSelector />
+	{/snippet}
 	{#snippet appSlider()}
 		<AppSlider />
 	{/snippet}
diff --git a/apps/picture/apps/web/src/lib/i18n/index.ts b/apps/picture/apps/web/src/lib/i18n/index.ts
index 7a6cba119..2706251dd 100644
--- a/apps/picture/apps/web/src/lib/i18n/index.ts
+++ b/apps/picture/apps/web/src/lib/i18n/index.ts
@@ -2,7 +2,7 @@ import { browser } from '$app/environment';
 import { init, register, locale, waitLocale } from 'svelte-i18n';
 
 // List of supported locales
-export const supportedLocales = ['de', 'en'] as const;
+export const supportedLocales = ['de', 'en', 'it', 'fr', 'es'] as const;
 export type SupportedLocale = (typeof supportedLocales)[number];
 
 // Default locale
@@ -11,6 +11,9 @@ const defaultLocale = 'de';
 // Register all available locales
 register('de', () => import('./locales/de.json'));
 register('en', () => import('./locales/en.json'));
+register('it', () => import('./locales/it.json'));
+register('fr', () => import('./locales/fr.json'));
+register('es', () => import('./locales/es.json'));
 
 // Get initial locale from browser or localStorage
 function getInitialLocale(): SupportedLocale {
diff --git a/apps/picture/apps/web/src/lib/i18n/locales/es.json b/apps/picture/apps/web/src/lib/i18n/locales/es.json
new file mode 100644
index 000000000..0808e6891
--- /dev/null
+++ b/apps/picture/apps/web/src/lib/i18n/locales/es.json
@@ -0,0 +1,23 @@
+{
+	"app_slider": {
+		"title": "Más Apps de Manacore",
+		"memoro_desc": "Notas de voz con IA",
+		"memoro_long_desc": "Transforma tu voz en notas organizadas y accionables con transcripción y análisis impulsados por IA. Perfecto para capturar ideas en movimiento.",
+		"maerchenzauber_desc": "Cuentos mágicos para dormir",
+		"maerchenzauber_long_desc": "Crea cuentos personalizados para dormir para tus hijos con IA. Enciende la imaginación y haz cada noche mágica con narrativas únicas.",
+		"manadeck_desc": "Flashcards con IA",
+		"manadeck_long_desc": "Crea y estudia con flashcards inteligentes y repetición espaciada impulsada por IA.",
+		"picture_desc": "Generación de imágenes con IA",
+		"picture_long_desc": "Crea imágenes impresionantes con IA. Transforma tus ideas en obras de arte visuales en segundos.",
+		"moodlit_desc": "Tu compañero de ánimo",
+		"moodlit_long_desc": "Rastrea y comprende tus emociones con análisis impulsados por IA. Desarrolla conciencia emocional y mejora tu bienestar mental.",
+		"manacore_desc": "Suite de productividad IA",
+		"manacore_long_desc": "El centro para todas las apps de Manacore. Gestiona tus suscripciones, sincroniza datos y accede a potentes herramientas de IA desde un solo lugar.",
+		"coming_soon": "Próximamente",
+		"download": "Descargar",
+		"status_published": "Publicado",
+		"status_beta": "Beta",
+		"status_development": "En desarrollo",
+		"status_planning": "Planificado"
+	}
+}
diff --git a/apps/picture/apps/web/src/lib/i18n/locales/fr.json b/apps/picture/apps/web/src/lib/i18n/locales/fr.json
new file mode 100644
index 000000000..5dbee58e3
--- /dev/null
+++ b/apps/picture/apps/web/src/lib/i18n/locales/fr.json
@@ -0,0 +1,23 @@
+{
+	"app_slider": {
+		"title": "Autres Apps Manacore",
+		"memoro_desc": "Mémos vocaux avec IA",
+		"memoro_long_desc": "Transformez votre voix en notes organisées et exploitables grâce à la transcription et l'analyse alimentées par l'IA. Parfait pour capturer des idées en déplacement.",
+		"maerchenzauber_desc": "Histoires magiques du soir",
+		"maerchenzauber_long_desc": "Créez des histoires du soir personnalisées pour vos enfants avec l'IA. Éveillez l'imagination et rendez chaque nuit magique avec des récits uniques.",
+		"manadeck_desc": "Flashcards avec IA",
+		"manadeck_long_desc": "Créez et apprenez avec des flashcards intelligentes et une répétition espacée alimentée par l'IA.",
+		"picture_desc": "Génération d'images avec IA",
+		"picture_long_desc": "Créez des images époustouflantes avec l'IA. Transformez vos idées en œuvres d'art visuelles en quelques secondes.",
+		"moodlit_desc": "Ton compagnon d'humeur",
+		"moodlit_long_desc": "Suivez et comprenez vos émotions grâce aux analyses alimentées par l'IA. Développez votre conscience émotionnelle et améliorez votre bien-être mental.",
+		"manacore_desc": "Suite de productivité IA",
+		"manacore_long_desc": "Le hub central pour toutes les apps Manacore. Gérez vos abonnements, synchronisez vos données et accédez à de puissants outils IA depuis un seul endroit.",
+		"coming_soon": "Bientôt disponible",
+		"download": "Télécharger",
+		"status_published": "Publié",
+		"status_beta": "Bêta",
+		"status_development": "En développement",
+		"status_planning": "Planifié"
+	}
+}
diff --git a/apps/picture/apps/web/src/lib/i18n/locales/it.json b/apps/picture/apps/web/src/lib/i18n/locales/it.json
new file mode 100644
index 000000000..ab5d948fa
--- /dev/null
+++ b/apps/picture/apps/web/src/lib/i18n/locales/it.json
@@ -0,0 +1,23 @@
+{
+	"app_slider": {
+		"title": "Altre App Manacore",
+		"memoro_desc": "Memo vocali con IA",
+		"memoro_long_desc": "Trasforma la tua voce in appunti organizzati e azionabili con trascrizione e analisi basate su IA. Perfetto per catturare idee in movimento.",
+		"maerchenzauber_desc": "Storie magiche della buonanotte",
+		"maerchenzauber_long_desc": "Crea storie della buonanotte personalizzate per i tuoi bambini con l'IA. Accendi l'immaginazione e rendi ogni notte magica con racconti unici.",
+		"manadeck_desc": "Flashcard con IA",
+		"manadeck_long_desc": "Crea e studia con flashcard intelligenti e ripetizione spaziata basata su IA.",
+		"picture_desc": "Generazione immagini con IA",
+		"picture_long_desc": "Crea immagini straordinarie con l'IA. Trasforma le tue idee in opere d'arte visive in pochi secondi.",
+		"moodlit_desc": "Il tuo compagno d'umore",
+		"moodlit_long_desc": "Monitora e comprendi le tue emozioni con approfondimenti basati su IA. Sviluppa la consapevolezza emotiva e migliora il tuo benessere mentale.",
+		"manacore_desc": "Suite di produttività IA",
+		"manacore_long_desc": "L'hub centrale per tutte le app Manacore. Gestisci i tuoi abbonamenti, sincronizza i dati e accedi a potenti strumenti IA da un unico posto.",
+		"coming_soon": "Prossimamente",
+		"download": "Scarica",
+		"status_published": "Pubblicato",
+		"status_beta": "Beta",
+		"status_development": "In sviluppo",
+		"status_planning": "Pianificato"
+	}
+}
diff --git a/apps/presi/apps/web/package.json b/apps/presi/apps/web/package.json
index 0bee5d4f1..b20d47da3 100644
--- a/apps/presi/apps/web/package.json
+++ b/apps/presi/apps/web/package.json
@@ -35,6 +35,7 @@
 		"@manacore/shared-branding": "workspace:*",
 		"@manacore/shared-feedback-service": "workspace:*",
 		"@manacore/shared-feedback-ui": "workspace:*",
+		"@manacore/shared-i18n": "workspace:*",
 		"@manacore/shared-icons": "workspace:*",
 		"@manacore/shared-profile-ui": "workspace:*",
 		"@manacore/shared-subscription-ui": "workspace:*",
@@ -42,7 +43,8 @@
 		"@manacore/shared-theme": "workspace:*",
 		"@manacore/shared-theme-ui": "workspace:*",
 		"@manacore/shared-ui": "workspace:*",
-		"lucide-svelte": "^0.460.0"
+		"lucide-svelte": "^0.460.0",
+		"svelte-i18n": "^4.0.1"
 	},
 	"type": "module"
 }
diff --git a/apps/presi/apps/web/src/lib/components/LanguageSelector.svelte b/apps/presi/apps/web/src/lib/components/LanguageSelector.svelte
new file mode 100644
index 000000000..072a68eac
--- /dev/null
+++ b/apps/presi/apps/web/src/lib/components/LanguageSelector.svelte
@@ -0,0 +1,20 @@
+<script lang="ts">
+	import { locale } from 'svelte-i18n';
+	import { LanguageSelector } from '@manacore/shared-i18n';
+	import { setLocale, supportedLocales } from '$lib/i18n';
+	import { theme } from '$lib/stores/theme';
+
+	let currentLocale = $derived($locale || 'de');
+
+	function handleLocaleChange(newLocale: string) {
+		setLocale(newLocale as any);
+	}
+</script>
+
+<LanguageSelector
+	{currentLocale}
+	{supportedLocales}
+	onLocaleChange={handleLocaleChange}
+	isDark={theme.isDark}
+	primaryColor="#f97316"
+/>
diff --git a/apps/presi/apps/web/src/lib/i18n/index.ts b/apps/presi/apps/web/src/lib/i18n/index.ts
new file mode 100644
index 000000000..acf6fc325
--- /dev/null
+++ b/apps/presi/apps/web/src/lib/i18n/index.ts
@@ -0,0 +1,52 @@
+import { browser } from '$app/environment';
+import { init, register, locale, waitLocale } from 'svelte-i18n';
+
+// List of supported locales
+export const supportedLocales = ['de', 'en', 'it', 'fr', 'es'] as const;
+export type SupportedLocale = (typeof supportedLocales)[number];
+
+// Default locale
+const defaultLocale = 'de';
+
+// Register all available locales
+register('de', () => import('./locales/de.json'));
+register('en', () => import('./locales/en.json'));
+register('it', () => import('./locales/it.json'));
+register('fr', () => import('./locales/fr.json'));
+register('es', () => import('./locales/es.json'));
+
+// Get initial locale from browser or localStorage
+function getInitialLocale(): SupportedLocale {
+	if (browser) {
+		// Check localStorage first
+		const stored = localStorage.getItem('presi_locale');
+		if (stored && supportedLocales.includes(stored as SupportedLocale)) {
+			return stored as SupportedLocale;
+		}
+
+		// Fall back to browser language
+		const browserLang = navigator.language.split('-')[0];
+		if (supportedLocales.includes(browserLang as SupportedLocale)) {
+			return browserLang as SupportedLocale;
+		}
+	}
+
+	return defaultLocale;
+}
+
+// Initialize i18n at module scope (required for SSR)
+init({
+	fallbackLocale: defaultLocale,
+	initialLocale: getInitialLocale(),
+});
+
+// Set locale and persist to localStorage
+export function setLocale(newLocale: SupportedLocale) {
+	locale.set(newLocale);
+	if (browser) {
+		localStorage.setItem('presi_locale', newLocale);
+	}
+}
+
+// Wait for locale to be loaded (useful for SSR)
+export { waitLocale };
diff --git a/apps/presi/apps/web/src/lib/i18n/locales/de.json b/apps/presi/apps/web/src/lib/i18n/locales/de.json
new file mode 100644
index 000000000..a34ffac83
--- /dev/null
+++ b/apps/presi/apps/web/src/lib/i18n/locales/de.json
@@ -0,0 +1,13 @@
+{
+	"app_slider": {
+		"title": "Weitere Manacore Apps",
+		"memoro_desc": "KI-gestützte Sprachmemos",
+		"maerchenzauber_desc": "Magische Gute-Nacht-Geschichten",
+		"manadeck_desc": "KI Lernkarten",
+		"picture_desc": "KI Bildgenerierung",
+		"moodlit_desc": "Dein Stimmungsbegleiter",
+		"manacore_desc": "KI-Produktivitätssuite",
+		"coming_soon": "Demnächst",
+		"download": "Download"
+	}
+}
diff --git a/apps/presi/apps/web/src/lib/i18n/locales/en.json b/apps/presi/apps/web/src/lib/i18n/locales/en.json
new file mode 100644
index 000000000..de8951cf7
--- /dev/null
+++ b/apps/presi/apps/web/src/lib/i18n/locales/en.json
@@ -0,0 +1,13 @@
+{
+	"app_slider": {
+		"title": "More Manacore Apps",
+		"memoro_desc": "AI-powered voice memos",
+		"maerchenzauber_desc": "Magical bedtime stories",
+		"manadeck_desc": "AI flashcards",
+		"picture_desc": "AI image generation",
+		"moodlit_desc": "Your mood companion",
+		"manacore_desc": "AI productivity suite",
+		"coming_soon": "Coming soon",
+		"download": "Download"
+	}
+}
diff --git a/apps/presi/apps/web/src/lib/i18n/locales/es.json b/apps/presi/apps/web/src/lib/i18n/locales/es.json
new file mode 100644
index 000000000..381a82335
--- /dev/null
+++ b/apps/presi/apps/web/src/lib/i18n/locales/es.json
@@ -0,0 +1,13 @@
+{
+	"app_slider": {
+		"title": "Más Apps de Manacore",
+		"memoro_desc": "Notas de voz con IA",
+		"maerchenzauber_desc": "Cuentos mágicos para dormir",
+		"manadeck_desc": "Flashcards con IA",
+		"picture_desc": "Generación de imágenes con IA",
+		"moodlit_desc": "Tu compañero de ánimo",
+		"manacore_desc": "Suite de productividad IA",
+		"coming_soon": "Próximamente",
+		"download": "Descargar"
+	}
+}
diff --git a/apps/presi/apps/web/src/lib/i18n/locales/fr.json b/apps/presi/apps/web/src/lib/i18n/locales/fr.json
new file mode 100644
index 000000000..756dd891c
--- /dev/null
+++ b/apps/presi/apps/web/src/lib/i18n/locales/fr.json
@@ -0,0 +1,13 @@
+{
+	"app_slider": {
+		"title": "Autres Apps Manacore",
+		"memoro_desc": "Mémos vocaux avec IA",
+		"maerchenzauber_desc": "Histoires magiques du soir",
+		"manadeck_desc": "Flashcards avec IA",
+		"picture_desc": "Génération d'images avec IA",
+		"moodlit_desc": "Ton compagnon d'humeur",
+		"manacore_desc": "Suite de productivité IA",
+		"coming_soon": "Bientôt disponible",
+		"download": "Télécharger"
+	}
+}
diff --git a/apps/presi/apps/web/src/lib/i18n/locales/it.json b/apps/presi/apps/web/src/lib/i18n/locales/it.json
new file mode 100644
index 000000000..223bf728e
--- /dev/null
+++ b/apps/presi/apps/web/src/lib/i18n/locales/it.json
@@ -0,0 +1,13 @@
+{
+	"app_slider": {
+		"title": "Altre App Manacore",
+		"memoro_desc": "Memo vocali con IA",
+		"maerchenzauber_desc": "Storie magiche della buonanotte",
+		"manadeck_desc": "Flashcard con IA",
+		"picture_desc": "Generazione immagini con IA",
+		"moodlit_desc": "Il tuo compagno d'umore",
+		"manacore_desc": "Suite di produttività IA",
+		"coming_soon": "Prossimamente",
+		"download": "Scarica"
+	}
+}
diff --git a/apps/presi/apps/web/src/routes/forgot-password/+page.svelte b/apps/presi/apps/web/src/routes/forgot-password/+page.svelte
index e6cd36efd..6d64ad0a3 100644
--- a/apps/presi/apps/web/src/routes/forgot-password/+page.svelte
+++ b/apps/presi/apps/web/src/routes/forgot-password/+page.svelte
@@ -1,24 +1,16 @@
 <script lang="ts">
 	import { goto } from '$app/navigation';
+	import { locale } from 'svelte-i18n';
 	import { ForgotPasswordPage } from '@manacore/shared-auth-ui';
+	import { getForgotPasswordTranslations } from '@manacore/shared-i18n';
 	import { PresiLogo } from '@manacore/shared-branding';
 	import { auth } from '$lib/stores/auth.svelte';
 	import AppSlider from '$lib/components/AppSlider.svelte';
+	import LanguageSelector from '$lib/components/LanguageSelector.svelte';
+	import '$lib/i18n';
 
-	// English translations
-	const translations = {
-		titleForm: 'Reset Password',
-		titleSuccess: 'Email Sent',
-		description: "Enter your email address and we'll send you a link to reset your password.",
-		emailPlaceholder: 'Email',
-		sendResetLinkButton: 'Send Reset Link',
-		sending: 'Sending...',
-		backToLogin: 'Back to Login',
-		resendEmail: 'Resend Email',
-		successMessage: "We've sent a password reset link to {email}. Please check your inbox.",
-		emailRequired: 'Email is required',
-		sendFailed: 'Failed to send reset email',
-	};
+	// Get translations based on current locale
+	const translations = $derived(getForgotPasswordTranslations($locale || 'de'));
 
 	async function handleForgotPassword(email: string) {
 		return auth.forgotPassword(email);
@@ -26,7 +18,7 @@
 </script>
 
 <svelte:head>
-	<title>Forgot Password | Presi</title>
+	<title>{translations.titleForm} | Presi</title>
 </svelte:head>
 
 <ForgotPasswordPage
@@ -40,6 +32,9 @@
 	darkBackground="#1c1210"
 	{translations}
 >
+	{#snippet headerControls()}
+		<LanguageSelector />
+	{/snippet}
 	{#snippet appSlider()}
 		<AppSlider />
 	{/snippet}
diff --git a/apps/presi/apps/web/src/routes/login/+page.svelte b/apps/presi/apps/web/src/routes/login/+page.svelte
index ee687e9e5..1de53fb3b 100644
--- a/apps/presi/apps/web/src/routes/login/+page.svelte
+++ b/apps/presi/apps/web/src/routes/login/+page.svelte
@@ -1,39 +1,20 @@
 <script lang="ts">
 	import { goto } from '$app/navigation';
 	import { page } from '$app/stores';
+	import { locale } from 'svelte-i18n';
 	import { LoginPage } from '@manacore/shared-auth-ui';
+	import { getLoginTranslations } from '@manacore/shared-i18n';
 	import { PresiLogo } from '@manacore/shared-branding';
 	import { auth } from '$lib/stores/auth.svelte';
 	import AppSlider from '$lib/components/AppSlider.svelte';
+	import LanguageSelector from '$lib/components/LanguageSelector.svelte';
+	import '$lib/i18n';
 
 	// Get redirect URL from query params
 	const redirectTo = $derived($page.url.searchParams.get('redirectTo') || '/');
 
-	// English translations
-	const translations = {
-		title: 'Sign In',
-		subtitle: 'Sign in with your account',
-		emailPlaceholder: 'Email',
-		passwordPlaceholder: 'Password',
-		rememberMe: 'Remember me',
-		forgotPassword: 'Forgot password?',
-		signInButton: 'Sign In',
-		signingIn: 'Signing in...',
-		success: 'Success!',
-		orDivider: 'or',
-		noAccount: "Don't have an account?",
-		createAccount: 'Create one',
-		skipToForm: 'Skip to login form',
-		showPassword: 'Show password',
-		hidePassword: 'Hide password',
-		emailRequired: 'Email is required',
-		emailInvalid: 'Please enter a valid email address',
-		passwordRequired: 'Password is required',
-		signInFailed: 'Sign in failed',
-		googleSignInFailed: 'Google sign in failed',
-		signInSuccess: 'Successfully signed in. Redirecting...',
-		googleSignInSuccess: 'Successfully signed in with Google. Redirecting...',
-	};
+	// Get translations based on current locale
+	const translations = $derived(getLoginTranslations($locale || 'de'));
 
 	async function handleSignIn(email: string, password: string) {
 		return auth.login(email, password);
@@ -41,7 +22,7 @@
 </script>
 
 <svelte:head>
-	<title>Login | Presi</title>
+	<title>{translations.title} | Presi</title>
 </svelte:head>
 
 <LoginPage
@@ -59,6 +40,9 @@
 	darkBackground="#1c1210"
 	{translations}
 >
+	{#snippet headerControls()}
+		<LanguageSelector />
+	{/snippet}
 	{#snippet appSlider()}
 		<AppSlider />
 	{/snippet}
diff --git a/apps/presi/apps/web/src/routes/register/+page.svelte b/apps/presi/apps/web/src/routes/register/+page.svelte
index 18056ed1f..6c76ec2ae 100644
--- a/apps/presi/apps/web/src/routes/register/+page.svelte
+++ b/apps/presi/apps/web/src/routes/register/+page.svelte
@@ -1,33 +1,16 @@
 <script lang="ts">
 	import { goto } from '$app/navigation';
+	import { locale } from 'svelte-i18n';
 	import { RegisterPage } from '@manacore/shared-auth-ui';
+	import { getRegisterTranslations } from '@manacore/shared-i18n';
 	import { PresiLogo } from '@manacore/shared-branding';
 	import { auth } from '$lib/stores/auth.svelte';
 	import AppSlider from '$lib/components/AppSlider.svelte';
+	import LanguageSelector from '$lib/components/LanguageSelector.svelte';
+	import '$lib/i18n';
 
-	// English translations
-	const translations = {
-		title: 'Create Account',
-		emailPlaceholder: 'Email',
-		passwordPlaceholder: 'Password',
-		confirmPasswordPlaceholder: 'Confirm Password',
-		passwordRequirements:
-			'Password must be at least 8 characters with lowercase, uppercase, number, and special character.',
-		createAccountButton: 'Create Account',
-		creatingAccount: 'Creating Account...',
-		backToLogin: 'Back to Login',
-		showPassword: 'Show password',
-		hidePassword: 'Hide password',
-		emailRequired: 'Email is required',
-		passwordRequired: 'Password is required',
-		confirmPasswordRequired: 'Please confirm your password',
-		passwordsDoNotMatch: 'Passwords do not match',
-		passwordTooShort: 'Password must be at least 8 characters',
-		passwordStrengthError:
-			'Password must include lowercase, uppercase, number, and special character',
-		registrationFailed: 'Registration failed',
-		accountCreated: 'Account created! Please check your email to verify your account.',
-	};
+	// Get translations based on current locale
+	const translations = $derived(getRegisterTranslations($locale || 'de'));
 
 	async function handleSignUp(email: string, password: string) {
 		return auth.register(email, password);
@@ -35,7 +18,7 @@
 </script>
 
 <svelte:head>
-	<title>Register | Presi</title>
+	<title>{translations.title} | Presi</title>
 </svelte:head>
 
 <RegisterPage
@@ -50,6 +33,9 @@
 	darkBackground="#1c1210"
 	{translations}
 >
+	{#snippet headerControls()}
+		<LanguageSelector />
+	{/snippet}
 	{#snippet appSlider()}
 		<AppSlider />
 	{/snippet}
diff --git a/apps/zitare/apps/web/package.json b/apps/zitare/apps/web/package.json
index 43a97cbbd..0e17ae941 100644
--- a/apps/zitare/apps/web/package.json
+++ b/apps/zitare/apps/web/package.json
@@ -32,6 +32,7 @@
 		"@manacore/shared-branding": "workspace:*",
 		"@manacore/shared-feedback-service": "workspace:*",
 		"@manacore/shared-feedback-ui": "workspace:*",
+		"@manacore/shared-i18n": "workspace:*",
 		"@manacore/shared-icons": "workspace:*",
 		"@manacore/shared-profile-ui": "workspace:*",
 		"@manacore/shared-subscription-ui": "workspace:*",
@@ -40,7 +41,8 @@
 		"@manacore/shared-theme-ui": "workspace:*",
 		"@manacore/shared-ui": "workspace:*",
 		"@zitare/shared": "workspace:*",
-		"@zitare/web-ui": "workspace:*"
+		"@zitare/web-ui": "workspace:*",
+		"svelte-i18n": "^4.0.1"
 	},
 	"type": "module"
 }
diff --git a/apps/zitare/apps/web/src/lib/components/LanguageSelector.svelte b/apps/zitare/apps/web/src/lib/components/LanguageSelector.svelte
new file mode 100644
index 000000000..97183be0b
--- /dev/null
+++ b/apps/zitare/apps/web/src/lib/components/LanguageSelector.svelte
@@ -0,0 +1,20 @@
+<script lang="ts">
+	import { locale } from 'svelte-i18n';
+	import { LanguageSelector } from '@manacore/shared-i18n';
+	import { setLocale, supportedLocales } from '$lib/i18n';
+	import { theme } from '$lib/stores/theme';
+
+	let currentLocale = $derived($locale || 'de');
+
+	function handleLocaleChange(newLocale: string) {
+		setLocale(newLocale as any);
+	}
+</script>
+
+<LanguageSelector
+	{currentLocale}
+	{supportedLocales}
+	onLocaleChange={handleLocaleChange}
+	isDark={theme.isDark}
+	primaryColor="#f59e0b"
+/>
diff --git a/apps/zitare/apps/web/src/lib/i18n/index.ts b/apps/zitare/apps/web/src/lib/i18n/index.ts
new file mode 100644
index 000000000..bbd3a9e1d
--- /dev/null
+++ b/apps/zitare/apps/web/src/lib/i18n/index.ts
@@ -0,0 +1,52 @@
+import { browser } from '$app/environment';
+import { init, register, locale, waitLocale } from 'svelte-i18n';
+
+// List of supported locales
+export const supportedLocales = ['de', 'en', 'it', 'fr', 'es'] as const;
+export type SupportedLocale = (typeof supportedLocales)[number];
+
+// Default locale
+const defaultLocale = 'de';
+
+// Register all available locales
+register('de', () => import('./locales/de.json'));
+register('en', () => import('./locales/en.json'));
+register('it', () => import('./locales/it.json'));
+register('fr', () => import('./locales/fr.json'));
+register('es', () => import('./locales/es.json'));
+
+// Get initial locale from browser or localStorage
+function getInitialLocale(): SupportedLocale {
+	if (browser) {
+		// Check localStorage first
+		const stored = localStorage.getItem('zitare_locale');
+		if (stored && supportedLocales.includes(stored as SupportedLocale)) {
+			return stored as SupportedLocale;
+		}
+
+		// Fall back to browser language
+		const browserLang = navigator.language.split('-')[0];
+		if (supportedLocales.includes(browserLang as SupportedLocale)) {
+			return browserLang as SupportedLocale;
+		}
+	}
+
+	return defaultLocale;
+}
+
+// Initialize i18n at module scope (required for SSR)
+init({
+	fallbackLocale: defaultLocale,
+	initialLocale: getInitialLocale(),
+});
+
+// Set locale and persist to localStorage
+export function setLocale(newLocale: SupportedLocale) {
+	locale.set(newLocale);
+	if (browser) {
+		localStorage.setItem('zitare_locale', newLocale);
+	}
+}
+
+// Wait for locale to be loaded (useful for SSR)
+export { waitLocale };
diff --git a/apps/zitare/apps/web/src/lib/i18n/locales/de.json b/apps/zitare/apps/web/src/lib/i18n/locales/de.json
new file mode 100644
index 000000000..a34ffac83
--- /dev/null
+++ b/apps/zitare/apps/web/src/lib/i18n/locales/de.json
@@ -0,0 +1,13 @@
+{
+	"app_slider": {
+		"title": "Weitere Manacore Apps",
+		"memoro_desc": "KI-gestützte Sprachmemos",
+		"maerchenzauber_desc": "Magische Gute-Nacht-Geschichten",
+		"manadeck_desc": "KI Lernkarten",
+		"picture_desc": "KI Bildgenerierung",
+		"moodlit_desc": "Dein Stimmungsbegleiter",
+		"manacore_desc": "KI-Produktivitätssuite",
+		"coming_soon": "Demnächst",
+		"download": "Download"
+	}
+}
diff --git a/apps/zitare/apps/web/src/lib/i18n/locales/en.json b/apps/zitare/apps/web/src/lib/i18n/locales/en.json
new file mode 100644
index 000000000..de8951cf7
--- /dev/null
+++ b/apps/zitare/apps/web/src/lib/i18n/locales/en.json
@@ -0,0 +1,13 @@
+{
+	"app_slider": {
+		"title": "More Manacore Apps",
+		"memoro_desc": "AI-powered voice memos",
+		"maerchenzauber_desc": "Magical bedtime stories",
+		"manadeck_desc": "AI flashcards",
+		"picture_desc": "AI image generation",
+		"moodlit_desc": "Your mood companion",
+		"manacore_desc": "AI productivity suite",
+		"coming_soon": "Coming soon",
+		"download": "Download"
+	}
+}
diff --git a/apps/zitare/apps/web/src/lib/i18n/locales/es.json b/apps/zitare/apps/web/src/lib/i18n/locales/es.json
new file mode 100644
index 000000000..381a82335
--- /dev/null
+++ b/apps/zitare/apps/web/src/lib/i18n/locales/es.json
@@ -0,0 +1,13 @@
+{
+	"app_slider": {
+		"title": "Más Apps de Manacore",
+		"memoro_desc": "Notas de voz con IA",
+		"maerchenzauber_desc": "Cuentos mágicos para dormir",
+		"manadeck_desc": "Flashcards con IA",
+		"picture_desc": "Generación de imágenes con IA",
+		"moodlit_desc": "Tu compañero de ánimo",
+		"manacore_desc": "Suite de productividad IA",
+		"coming_soon": "Próximamente",
+		"download": "Descargar"
+	}
+}
diff --git a/apps/zitare/apps/web/src/lib/i18n/locales/fr.json b/apps/zitare/apps/web/src/lib/i18n/locales/fr.json
new file mode 100644
index 000000000..756dd891c
--- /dev/null
+++ b/apps/zitare/apps/web/src/lib/i18n/locales/fr.json
@@ -0,0 +1,13 @@
+{
+	"app_slider": {
+		"title": "Autres Apps Manacore",
+		"memoro_desc": "Mémos vocaux avec IA",
+		"maerchenzauber_desc": "Histoires magiques du soir",
+		"manadeck_desc": "Flashcards avec IA",
+		"picture_desc": "Génération d'images avec IA",
+		"moodlit_desc": "Ton compagnon d'humeur",
+		"manacore_desc": "Suite de productivité IA",
+		"coming_soon": "Bientôt disponible",
+		"download": "Télécharger"
+	}
+}
diff --git a/apps/zitare/apps/web/src/lib/i18n/locales/it.json b/apps/zitare/apps/web/src/lib/i18n/locales/it.json
new file mode 100644
index 000000000..223bf728e
--- /dev/null
+++ b/apps/zitare/apps/web/src/lib/i18n/locales/it.json
@@ -0,0 +1,13 @@
+{
+	"app_slider": {
+		"title": "Altre App Manacore",
+		"memoro_desc": "Memo vocali con IA",
+		"maerchenzauber_desc": "Storie magiche della buonanotte",
+		"manadeck_desc": "Flashcard con IA",
+		"picture_desc": "Generazione immagini con IA",
+		"moodlit_desc": "Il tuo compagno d'umore",
+		"manacore_desc": "Suite di produttività IA",
+		"coming_soon": "Prossimamente",
+		"download": "Scarica"
+	}
+}
diff --git a/apps/zitare/apps/web/src/routes/(auth)/forgot-password/+page.svelte b/apps/zitare/apps/web/src/routes/(auth)/forgot-password/+page.svelte
index 77bdcfa45..3bc7595db 100644
--- a/apps/zitare/apps/web/src/routes/(auth)/forgot-password/+page.svelte
+++ b/apps/zitare/apps/web/src/routes/(auth)/forgot-password/+page.svelte
@@ -1,8 +1,14 @@
 <script lang="ts">
 	import { goto } from '$app/navigation';
+	import { locale } from 'svelte-i18n';
 	import { ForgotPasswordPage } from '@manacore/shared-auth-ui';
 	import { ZitareLogo } from '@manacore/shared-branding';
+	import { getForgotPasswordTranslations } from '@manacore/shared-i18n';
 	import { authStore } from '$lib/stores/auth.svelte';
+	import LanguageSelector from '$lib/components/LanguageSelector.svelte';
+	import '$lib/i18n';
+
+	const translations = $derived(getForgotPasswordTranslations($locale || 'de'));
 
 	async function handleForgotPassword(email: string) {
 		return authStore.resetPassword(email);
@@ -10,7 +16,7 @@
 </script>
 
 <svelte:head>
-	<title>Passwort vergessen - Zitare</title>
+	<title>{translations.titleForm} - Zitare</title>
 </svelte:head>
 
 <ForgotPasswordPage
@@ -22,4 +28,9 @@
 	loginPath="/login"
 	lightBackground="#fffbeb"
 	darkBackground="#1c1917"
-/>
+	{translations}
+>
+	{#snippet headerControls()}
+		<LanguageSelector />
+	{/snippet}
+</ForgotPasswordPage>
diff --git a/apps/zitare/apps/web/src/routes/(auth)/login/+page.svelte b/apps/zitare/apps/web/src/routes/(auth)/login/+page.svelte
index b0d63703e..26372c9d6 100644
--- a/apps/zitare/apps/web/src/routes/(auth)/login/+page.svelte
+++ b/apps/zitare/apps/web/src/routes/(auth)/login/+page.svelte
@@ -1,8 +1,14 @@
 <script lang="ts">
 	import { goto } from '$app/navigation';
+	import { locale } from 'svelte-i18n';
 	import { LoginPage } from '@manacore/shared-auth-ui';
 	import { ZitareLogo } from '@manacore/shared-branding';
+	import { getLoginTranslations } from '@manacore/shared-i18n';
 	import { authStore } from '$lib/stores/auth.svelte';
+	import LanguageSelector from '$lib/components/LanguageSelector.svelte';
+	import '$lib/i18n';
+
+	const translations = $derived(getLoginTranslations($locale || 'de'));
 
 	async function handleSignIn(email: string, password: string) {
 		return authStore.signIn(email, password);
@@ -10,7 +16,7 @@
 </script>
 
 <svelte:head>
-	<title>Anmelden - Zitare</title>
+	<title>{translations.title} - Zitare</title>
 </svelte:head>
 
 <LoginPage
@@ -24,4 +30,9 @@
 	forgotPasswordPath="/forgot-password"
 	lightBackground="#fffbeb"
 	darkBackground="#1c1917"
-/>
+	{translations}
+>
+	{#snippet headerControls()}
+		<LanguageSelector />
+	{/snippet}
+</LoginPage>
diff --git a/apps/zitare/apps/web/src/routes/(auth)/register/+page.svelte b/apps/zitare/apps/web/src/routes/(auth)/register/+page.svelte
index 4d35fda6a..6e46f40a0 100644
--- a/apps/zitare/apps/web/src/routes/(auth)/register/+page.svelte
+++ b/apps/zitare/apps/web/src/routes/(auth)/register/+page.svelte
@@ -1,8 +1,14 @@
 <script lang="ts">
 	import { goto } from '$app/navigation';
+	import { locale } from 'svelte-i18n';
 	import { RegisterPage } from '@manacore/shared-auth-ui';
 	import { ZitareLogo } from '@manacore/shared-branding';
+	import { getRegisterTranslations } from '@manacore/shared-i18n';
 	import { authStore } from '$lib/stores/auth.svelte';
+	import LanguageSelector from '$lib/components/LanguageSelector.svelte';
+	import '$lib/i18n';
+
+	const translations = $derived(getRegisterTranslations($locale || 'de'));
 
 	async function handleSignUp(email: string, password: string) {
 		return authStore.signUp(email, password);
@@ -10,7 +16,7 @@
 </script>
 
 <svelte:head>
-	<title>Registrieren - Zitare</title>
+	<title>{translations.title} - Zitare</title>
 </svelte:head>
 
 <RegisterPage
@@ -23,4 +29,9 @@
 	loginPath="/login"
 	lightBackground="#fffbeb"
 	darkBackground="#1c1917"
-/>
+	{translations}
+>
+	{#snippet headerControls()}
+		<LanguageSelector />
+	{/snippet}
+</RegisterPage>
diff --git a/packages/shared-auth-ui/src/pages/ForgotPasswordPage.svelte b/packages/shared-auth-ui/src/pages/ForgotPasswordPage.svelte
index 30c293430..fb3ace7f2 100644
--- a/packages/shared-auth-ui/src/pages/ForgotPasswordPage.svelte
+++ b/packages/shared-auth-ui/src/pages/ForgotPasswordPage.svelte
@@ -56,6 +56,8 @@
 		darkBackground?: string;
 		/** App slider snippet */
 		appSlider?: Snippet;
+		/** Header controls snippet (e.g., language selector) */
+		headerControls?: Snippet;
 		/** Translations for i18n support */
 		translations?: Partial<ForgotPasswordTranslations>;
 	}
@@ -70,6 +72,7 @@
 		lightBackground = '#f5f5f5',
 		darkBackground = '#121212',
 		appSlider,
+		headerControls,
 		translations = {},
 	}: Props = $props();
 
@@ -138,6 +141,12 @@
 	class="flex min-h-screen flex-col justify-between"
 	style="background-color: {getPageBackground()}; max-width: 100vw; overflow-x: hidden;"
 >
+	{#if headerControls}
+		<div style="position: absolute; top: 1rem; right: 1rem; z-index: 50; opacity: 0.6; display: flex; gap: 0.75rem;">
+			{@render headerControls()}
+		</div>
+	{/if}
+
 	<!-- Top Section - Logo -->
 	<div class="flex flex-col items-center justify-center pt-16 pb-8">
 		<div
diff --git a/packages/shared-auth-ui/src/pages/RegisterPage.svelte b/packages/shared-auth-ui/src/pages/RegisterPage.svelte
index f85953374..1a5b9c767 100644
--- a/packages/shared-auth-ui/src/pages/RegisterPage.svelte
+++ b/packages/shared-auth-ui/src/pages/RegisterPage.svelte
@@ -74,6 +74,8 @@
 		darkBackground?: string;
 		/** App slider snippet */
 		appSlider?: Snippet;
+		/** Header controls snippet (e.g., language selector) */
+		headerControls?: Snippet;
 		/** Translations for i18n support */
 		translations?: Partial<RegisterTranslations>;
 	}
@@ -89,6 +91,7 @@
 		lightBackground = '#f5f5f5',
 		darkBackground = '#121212',
 		appSlider,
+		headerControls,
 		translations = {},
 	}: Props = $props();
 
@@ -220,6 +223,12 @@
 	class="flex min-h-screen flex-col justify-between"
 	style="background-color: {getPageBackground()}; max-width: 100vw; overflow-x: hidden;"
 >
+	{#if headerControls}
+		<div style="position: absolute; top: 1rem; right: 1rem; z-index: 50; opacity: 0.6; display: flex; gap: 0.75rem;">
+			{@render headerControls()}
+		</div>
+	{/if}
+
 	<!-- Top Section - Logo -->
 	<div class="flex flex-col items-center justify-center pt-16 pb-8">
 		<div
diff --git a/packages/shared-branding/src/index.ts b/packages/shared-branding/src/index.ts
index 8e30f3afd..e4d7541cf 100644
--- a/packages/shared-branding/src/index.ts
+++ b/packages/shared-branding/src/index.ts
@@ -22,6 +22,8 @@ export {
 	UloadLogo,
 	ChatLogo,
 	PresiLogo,
+	NutriPhiLogo,
+	ZitareLogo,
 } from './logos';
 
 // Configuration
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 56bb0c007..14c1c1a4f 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -313,6 +313,9 @@ importers:
       marked:
         specifier: ^17.0.0
         version: 17.0.1
+      svelte-i18n:
+        specifier: ^4.0.1
+        version: 4.0.1(svelte@5.44.0)
     devDependencies:
       '@sveltejs/adapter-auto':
         specifier: ^6.0.0
@@ -1776,6 +1779,9 @@ importers:
       '@manacore/shared-feedback-ui':
         specifier: workspace:*
         version: link:../../../../packages/shared-feedback-ui
+      '@manacore/shared-i18n':
+        specifier: workspace:*
+        version: link:../../../../packages/shared-i18n
       '@manacore/shared-icons':
         specifier: workspace:*
         version: link:../../../../packages/shared-icons
@@ -1803,6 +1809,9 @@ importers:
       lucide-svelte:
         specifier: ^0.460.0
         version: 0.460.1(svelte@5.44.0)
+      svelte-i18n:
+        specifier: ^4.0.1
+        version: 4.0.1(svelte@5.44.0)
     devDependencies:
       '@sveltejs/adapter-auto':
         specifier: ^3.0.0
@@ -2164,6 +2173,9 @@ importers:
       '@manacore/shared-feedback-ui':
         specifier: workspace:*
         version: link:../../../../packages/shared-feedback-ui
+      '@manacore/shared-i18n':
+        specifier: workspace:*
+        version: link:../../../../packages/shared-i18n
       '@manacore/shared-icons':
         specifier: workspace:*
         version: link:../../../../packages/shared-icons
@@ -2191,6 +2203,9 @@ importers:
       '@zitare/web-ui':
         specifier: workspace:*
         version: link:../../packages/web-ui
+      svelte-i18n:
+        specifier: ^4.0.1
+        version: 4.0.1(svelte@5.44.0)
     devDependencies:
       '@sveltejs/adapter-auto':
         specifier: ^3.0.0