diff --git a/frontend/index.html b/frontend/index.html
index 38747f1..2ce889f 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -26,6 +26,9 @@
 
     <meta name="theme-color" content="#FF8C5A" />
     <link rel="alternate" hreflang="de" href="%VITE_PUBLIC_BASE_URL%/" />
+    <link rel="alternate" hreflang="en" href="%VITE_PUBLIC_BASE_URL%/?lang=en" />
+    <link rel="alternate" hreflang="es" href="%VITE_PUBLIC_BASE_URL%/?lang=es" />
+    <link rel="alternate" hreflang="ceb" href="%VITE_PUBLIC_BASE_URL%/?lang=ceb" />
     <link rel="alternate" hreflang="x-default" href="%VITE_PUBLIC_BASE_URL%/" />
 
 </head>
@@ -33,11 +36,26 @@
 <body>
     <div id="app"></div>
     <noscript>
-        <section style="max-width:960px;margin:40px auto;padding:0 20px;font-family:Arial,sans-serif;line-height:1.6;">
+        <section lang="de" style="max-width:960px;margin:40px auto;padding:0 20px;font-family:Arial,sans-serif;line-height:1.6;">
             <h1>YourPart</h1>
             <p>YourPart ist eine Plattform fuer Community, Chat, Forum, Blogs, Vokabeltrainer, das Browser-Aufbauspiel Falukant und Minispiele.</p>
             <p>Wichtige Bereiche: <a href="/blogs">Blogs</a>, <a href="/vokabeltrainer">Vokabeltrainer</a>, <a href="/falukant">Falukant</a> und <a href="/minigames">Minispiele</a>.</p>
         </section>
+        <section lang="en" style="max-width:960px;margin:24px auto;padding:0 20px;font-family:Arial,sans-serif;line-height:1.6;">
+            <h2>YourPart (English)</h2>
+            <p>YourPart is a platform for community, chat, forums, blogs, a vocabulary trainer, the browser builder game Falukant and minigames.</p>
+            <p>Key areas: <a href="/blogs?lang=en">Blogs</a>, <a href="/vokabeltrainer?lang=en">Vocabulary trainer</a>, <a href="/falukant?lang=en">Falukant</a> and <a href="/minigames?lang=en">Minigames</a>.</p>
+        </section>
+        <section lang="es" style="max-width:960px;margin:24px auto;padding:0 20px;font-family:Arial,sans-serif;line-height:1.6;">
+            <h2>YourPart (Español)</h2>
+            <p>YourPart es una plataforma para comunidad, chat, foros, blogs, entrenador de vocabulario, el juego de construcción Falukant en el navegador y minijuegos.</p>
+            <p>Áreas: <a href="/blogs?lang=es">Blogs</a>, <a href="/vokabeltrainer?lang=es">Vocabulario</a>, <a href="/falukant?lang=es">Falukant</a> y <a href="/minigames?lang=es">Minijuegos</a>.</p>
+        </section>
+        <section lang="ceb" style="max-width:960px;margin:24px auto;padding:0 20px;font-family:Arial,sans-serif;line-height:1.6;">
+            <h2>YourPart (Cebuano)</h2>
+            <p>Ang YourPart usa ka plataporma alang sa komunidad, chat, forum, blog, trainer sa bokabularyo, ang browser game nga Falukant ug minigames.</p>
+            <p>Mga bahin: <a href="/blogs?lang=ceb">Blogs</a>, <a href="/vokabeltrainer?lang=ceb">Bokabularyo</a>, <a href="/falukant?lang=ceb">Falukant</a>, <a href="/minigames?lang=ceb">Minigames</a>.</p>
+        </section>
     </noscript>
     <script type="module" src="/src/main.js"></script>
 </body>
diff --git a/frontend/src/i18n/index.js b/frontend/src/i18n/index.js
index 564f436..23ea99e 100644
--- a/frontend/src/i18n/index.js
+++ b/frontend/src/i18n/index.js
@@ -19,6 +19,7 @@ import enBlog from './locales/en/blog.json';
 import enMinigames from './locales/en/minigames.json';
 import enMessage from './locales/en/message.json';
 import enPersonal from './locales/en/personal.json';
+import enSeo from './locales/en/seo.json';
 import cebGeneral from './locales/ceb/general.json';
 import cebHeader from './locales/ceb/header.json';
 import cebNavigation from './locales/ceb/navigation.json';
@@ -37,6 +38,7 @@ import cebPersonal from './locales/ceb/personal.json';
 import cebFalukant from './locales/ceb/falukant.json';
 import cebBlog from './locales/ceb/blog.json';
 import cebMinigames from './locales/ceb/minigames.json';
+import cebSeo from './locales/ceb/seo.json';
 
 import deGeneral from './locales/de/general.json';
 import deHeader from './locales/de/header.json'; 
@@ -56,6 +58,7 @@ import deBlog from './locales/de/blog.json';
 import deMinigames from './locales/de/minigames.json';
 import deMessage from './locales/de/message.json';
 import dePersonal from './locales/de/personal.json';
+import deSeo from './locales/de/seo.json';
 
 import esGeneral from './locales/es/general.json';
 import esHeader from './locales/es/header.json';
@@ -75,6 +78,7 @@ import esBlog from './locales/es/blog.json';
 import esMinigames from './locales/es/minigames.json';
 import esMessage from './locales/es/message.json';
 import esPersonal from './locales/es/personal.json';
+import esSeo from './locales/es/seo.json';
 
 const messages = {
   en: {
@@ -96,6 +100,7 @@ const messages = {
     ...enMinigames,
     ...enMessage,
     ...enPersonal,
+    ...enSeo,
   },
   ceb: {
     ...enGeneral,
@@ -134,6 +139,7 @@ const messages = {
     ...cebFalukant,
     ...cebBlog,
     ...cebMinigames,
+    ...cebSeo,
   },
   de: {
     'Ok': 'Ok',
@@ -155,6 +161,7 @@ const messages = {
     ...deMinigames,
     ...deMessage,
     ...dePersonal,
+    ...deSeo,
   },
   es: {
     ...esGeneral,
@@ -175,6 +182,7 @@ const messages = {
     ...esMinigames,
     ...esMessage,
     ...esPersonal,
+    ...esSeo,
   }
 };
 
diff --git a/frontend/src/i18n/locales/ceb/seo.json b/frontend/src/i18n/locales/ceb/seo.json
new file mode 100644
index 0000000..71997db
--- /dev/null
+++ b/frontend/src/i18n/locales/ceb/seo.json
@@ -0,0 +1,51 @@
+{
+    "seo": {
+        "default": {
+            "title": "YourPart - Komunidad, chat, forum, bokabularyo, Falukant ug minigames",
+            "description": "YourPart naghiusa sa komunidad, chat, forum, blog, trainer sa bokabularyo, ang browser builder game nga Falukant ug minigames sa usa ka plataporma.",
+            "keywords": "YourPart, komunidad, chat, forum, blog, bokabularyo, Falukant, minigames, libre, pribado, privacy"
+        },
+        "home": {
+            "title": "YourPart - Komunidad, chat, forum, blogs, bokabularyo ug mga dula",
+            "description": "YourPart usa ka plataporma sa komunidad nga adunay chat, forum, blogs, trainer sa bokabularyo, ang browser game nga Falukant ug minigames.",
+            "keywords": "YourPart, komunidad, chat, forum, blogs, bokabularyo, browser game, Falukant, minigames, libre, pribado",
+            "jsonLdDescription": "Plataporma sa komunidad nga adunay chat, forum, blogs, bokabularyo, Falukant ug minigames sa browser."
+        },
+        "falukant": {
+            "title": "Falukant - Medieval nga browser builder game sa YourPart",
+            "description": "Falukant ang medieval nga browser builder game sa YourPart nga adunay komersyo, politika, pamilya, edukasyon ug pag-uswag sa karakter.",
+            "keywords": "Falukant, browser game, builder, medieval, ekonomiya, politika, YourPart, libre",
+            "jsonLdDescription": "Medieval nga browser builder game nga adunay komersyo, politika, pamilya ug pag-uswag sa karakter.",
+            "jsonLdName": "Falukant"
+        },
+        "minigames": {
+            "title": "Minigames sa YourPart - Match 3 ug taxi sa browser",
+            "description": "Diskubreha ang minigames sa browser sa YourPart: Match 3 ug taxi naghatag og paspas nga mga round sa plataporma.",
+            "keywords": "minigames, browser games, Match 3, taxi, casual, YourPart, libre",
+            "jsonLdDescription": "Minigames sa browser sa YourPart nga adunay Match 3 ug taxi.",
+            "jsonLdCollectionName": "Minigames sa YourPart"
+        },
+        "vocab": {
+            "title": "Trainer sa bokabularyo sa YourPart - pagkat-on og pinulongan online",
+            "description": "Ang trainer sa bokabularyo sa YourPart motabang kanimo sa pagkat-on og pinulongan nga adunay interaktibong leksyon, kurso ug ehersisyo.",
+            "keywords": "bokabularyo, pagkat-on pinulongan, online, kurso, ehersisyo, YourPart, libre",
+            "jsonLdDescription": "Interaktibong trainer sa bokabularyo nga adunay kurso, leksyon ug ehersisyo.",
+            "jsonLdName": "Bokabularyo YourPart"
+        },
+        "blogList": {
+            "title": "Blogs sa YourPart - mga post ug hilisgutan sa komunidad",
+            "description": "Tan-awa ang publiko nga blogs sa YourPart nga adunay mga post, hunahuna, kasinatian ug hilisgutan.",
+            "keywords": "blogs, blog sa komunidad, artikulo, post, YourPart",
+            "jsonLdDescription": "Publiko nga blogs ug mga post sa komunidad sa YourPart.",
+            "jsonLdName": "Blogs sa YourPart"
+        },
+        "blogPage": {
+            "title": "Blogs sa YourPart",
+            "description": "Publiko nga blogs, post ug sulod sa komunidad sa YourPart.",
+            "keywords": "blog, YourPart, komunidad"
+        },
+        "blogPost": {
+            "pageTitle": "{title} | Blog sa YourPart"
+        }
+    }
+}
diff --git a/frontend/src/i18n/locales/de/seo.json b/frontend/src/i18n/locales/de/seo.json
new file mode 100644
index 0000000..43e2340
--- /dev/null
+++ b/frontend/src/i18n/locales/de/seo.json
@@ -0,0 +1,51 @@
+{
+    "seo": {
+        "default": {
+            "title": "YourPart - Community, Chat, Forum, Vokabeltrainer, Falukant und Minispiele",
+            "description": "YourPart verbindet Community, Chat, Forum, Blogs, Vokabeltrainer, das Aufbauspiel Falukant und Browser-Minispiele auf einer Plattform.",
+            "keywords": "YourPart, Community, Chat, Forum, Blog, Vokabeltrainer, Falukant, Minispiele, kostenlos, privat, Datenschutz"
+        },
+        "home": {
+            "title": "YourPart - Community, Chat, Forum, Blogs, Vokabeltrainer und Spiele",
+            "description": "YourPart ist eine Community-Plattform mit Chat, Forum, Blogs, Vokabeltrainer, dem Browser-Aufbauspiel Falukant und Minispielen.",
+            "keywords": "YourPart, Community, Chat, Forum, Blogs, Vokabeltrainer, Browsergame, Falukant, Minispiele, kostenlos, privat",
+            "jsonLdDescription": "Community-Plattform mit Chat, Forum, Blogs, Vokabeltrainer, Falukant und Browser-Minispielen."
+        },
+        "falukant": {
+            "title": "Falukant - Mittelalterliches Browser-Aufbauspiel auf YourPart",
+            "description": "Falukant ist das mittelalterliche Browser-Aufbauspiel auf YourPart mit Handel, Politik, Familie, Bildung und Charakterentwicklung.",
+            "keywords": "Falukant, Browsergame, Aufbauspiel, Mittelalterspiel, Wirtschaftsspiel, Politikspiel, YourPart, kostenlos",
+            "jsonLdDescription": "Mittelalterliches Browser-Aufbauspiel mit Handel, Politik, Familie und Charakterentwicklung.",
+            "jsonLdName": "Falukant"
+        },
+        "minigames": {
+            "title": "Minispiele auf YourPart - Match 3 und Taxi im Browser",
+            "description": "Entdecke die Browser-Minispiele auf YourPart: Match 3 und Taxi bieten schnelle Spielrunden direkt auf der Plattform.",
+            "keywords": "Minispiele, Browsergames, Match 3, Taxi Spiel, Casual Games, YourPart, kostenlos",
+            "jsonLdDescription": "Browser-Minispiele auf YourPart mit Match 3 und Taxi.",
+            "jsonLdCollectionName": "YourPart Minispiele"
+        },
+        "vocab": {
+            "title": "Vokabeltrainer auf YourPart - Sprachen online lernen",
+            "description": "Der Vokabeltrainer auf YourPart unterstützt dich beim Sprachenlernen mit interaktiven Lektionen, Kursen und Übungen.",
+            "keywords": "Vokabeltrainer, Sprachen lernen, Online lernen, Sprachkurse, Übungen, YourPart, kostenlos",
+            "jsonLdDescription": "Interaktiver Vokabeltrainer mit Kursen, Lektionen und Übungen zum Sprachenlernen.",
+            "jsonLdName": "YourPart Vokabeltrainer"
+        },
+        "blogList": {
+            "title": "Blogs auf YourPart - Community-Beiträge und Themen",
+            "description": "Entdecke öffentliche Blogs auf YourPart mit Community-Beiträgen, Gedanken, Erfahrungen und Themen aus verschiedenen Bereichen.",
+            "keywords": "Blogs, Community Blog, Artikel, Beiträge, YourPart",
+            "jsonLdDescription": "Öffentliche Blogs und Community-Beiträge auf YourPart.",
+            "jsonLdName": "Blogs auf YourPart"
+        },
+        "blogPage": {
+            "title": "Blogs auf YourPart",
+            "description": "Öffentliche Blogs, Beiträge und Community-Inhalte auf YourPart.",
+            "keywords": "Blog, YourPart, Community"
+        },
+        "blogPost": {
+            "pageTitle": "{title} | Blog auf YourPart"
+        }
+    }
+}
diff --git a/frontend/src/i18n/locales/en/seo.json b/frontend/src/i18n/locales/en/seo.json
new file mode 100644
index 0000000..9ebb18e
--- /dev/null
+++ b/frontend/src/i18n/locales/en/seo.json
@@ -0,0 +1,51 @@
+{
+    "seo": {
+        "default": {
+            "title": "YourPart - Community, chat, forum, vocabulary trainer, Falukant and minigames",
+            "description": "YourPart brings together community, chat, forums, blogs, a vocabulary trainer, the browser builder game Falukant and minigames in one platform.",
+            "keywords": "YourPart, community, chat, forum, blog, vocabulary trainer, Falukant, minigames, free, private, privacy"
+        },
+        "home": {
+            "title": "YourPart - Community, chat, forum, blogs, vocabulary trainer and games",
+            "description": "YourPart is a community platform with chat, forums, blogs, a vocabulary trainer, the browser builder game Falukant and minigames.",
+            "keywords": "YourPart, community, chat, forum, blogs, vocabulary trainer, browser game, Falukant, minigames, free, private",
+            "jsonLdDescription": "Community platform with chat, forums, blogs, vocabulary trainer, Falukant and browser minigames."
+        },
+        "falukant": {
+            "title": "Falukant - Medieval browser builder game on YourPart",
+            "description": "Falukant is the medieval browser builder game on YourPart with trade, politics, family, education and character progression.",
+            "keywords": "Falukant, browser game, builder game, medieval game, economy game, politics game, YourPart, free",
+            "jsonLdDescription": "Medieval browser builder game with trade, politics, family and character progression.",
+            "jsonLdName": "Falukant"
+        },
+        "minigames": {
+            "title": "Minigames on YourPart - Match 3 and taxi in the browser",
+            "description": "Discover browser minigames on YourPart: Match 3 and taxi offer quick rounds directly on the platform.",
+            "keywords": "minigames, browser games, Match 3, taxi game, casual games, YourPart, free",
+            "jsonLdDescription": "Browser minigames on YourPart with Match 3 and taxi.",
+            "jsonLdCollectionName": "YourPart minigames"
+        },
+        "vocab": {
+            "title": "Vocabulary trainer on YourPart - learn languages online",
+            "description": "The YourPart vocabulary trainer helps you learn languages with interactive lessons, courses and exercises.",
+            "keywords": "vocabulary trainer, learn languages, online learning, language courses, exercises, YourPart, free",
+            "jsonLdDescription": "Interactive vocabulary trainer with courses, lessons and exercises for language learning.",
+            "jsonLdName": "YourPart vocabulary trainer"
+        },
+        "blogList": {
+            "title": "Blogs on YourPart - community posts and topics",
+            "description": "Explore public blogs on YourPart with community posts, ideas, experiences and topics from many areas.",
+            "keywords": "blogs, community blog, articles, posts, YourPart",
+            "jsonLdDescription": "Public blogs and community posts on YourPart.",
+            "jsonLdName": "Blogs on YourPart"
+        },
+        "blogPage": {
+            "title": "Blogs on YourPart",
+            "description": "Public blogs, posts and community content on YourPart.",
+            "keywords": "blog, YourPart, community"
+        },
+        "blogPost": {
+            "pageTitle": "{title} | Blog on YourPart"
+        }
+    }
+}
diff --git a/frontend/src/i18n/locales/es/seo.json b/frontend/src/i18n/locales/es/seo.json
new file mode 100644
index 0000000..25b3686
--- /dev/null
+++ b/frontend/src/i18n/locales/es/seo.json
@@ -0,0 +1,51 @@
+{
+    "seo": {
+        "default": {
+            "title": "YourPart - Comunidad, chat, foro, vocabulario, Falukant y minijuegos",
+            "description": "YourPart reúne comunidad, chat, foros, blogs, un entrenador de vocabulario, el juego de construcción Falukant y minijuegos en un navegador.",
+            "keywords": "YourPart, comunidad, chat, foro, blog, vocabulario, Falukant, minijuegos, gratis, privado, privacidad"
+        },
+        "home": {
+            "title": "YourPart - Comunidad, chat, foro, blogs, vocabulario y juegos",
+            "description": "YourPart es una plataforma comunitaria con chat, foro, blogs, entrenador de vocabulario, el juego de construcción Falukant y minijuegos.",
+            "keywords": "YourPart, comunidad, chat, foro, blogs, vocabulario, juego navegador, Falukant, minijuegos, gratis, privado",
+            "jsonLdDescription": "Plataforma comunitaria con chat, foro, blogs, vocabulario, Falukant y minijuegos en el navegador."
+        },
+        "falukant": {
+            "title": "Falukant - Juego de construcción medieval en el navegador en YourPart",
+            "description": "Falukant es el juego de construcción medieval en YourPart con comercio, política, familia, educación y progresión del personaje.",
+            "keywords": "Falukant, juego navegador, construcción, medieval, economía, política, YourPart, gratis",
+            "jsonLdDescription": "Juego de construcción medieval en el navegador con comercio, política, familia y progresión.",
+            "jsonLdName": "Falukant"
+        },
+        "minigames": {
+            "title": "Minijuegos en YourPart - Match 3 y taxi en el navegador",
+            "description": "Descubre minijuegos en el navegador en YourPart: Match 3 y taxi ofrecen partidas rápidas en la plataforma.",
+            "keywords": "minijuegos, juegos navegador, Match 3, taxi, casual, YourPart, gratis",
+            "jsonLdDescription": "Minijuegos en el navegador en YourPart con Match 3 y taxi.",
+            "jsonLdCollectionName": "Minijuegos YourPart"
+        },
+        "vocab": {
+            "title": "Entrenador de vocabulario en YourPart - aprende idiomas online",
+            "description": "El entrenador de vocabulario de YourPart te ayuda a aprender idiomas con lecciones interactivas, cursos y ejercicios.",
+            "keywords": "vocabulario, aprender idiomas, online, cursos, ejercicios, YourPart, gratis",
+            "jsonLdDescription": "Entrenador de vocabulario interactivo con cursos, lecciones y ejercicios.",
+            "jsonLdName": "Vocabulario YourPart"
+        },
+        "blogList": {
+            "title": "Blogs en YourPart - aportes y temas de la comunidad",
+            "description": "Descubre blogs públicos en YourPart con aportes, ideas, experiencias y temas de distintas áreas.",
+            "keywords": "blogs, blog comunitario, artículos, entradas, YourPart",
+            "jsonLdDescription": "Blogs públicos y aportes de la comunidad en YourPart.",
+            "jsonLdName": "Blogs en YourPart"
+        },
+        "blogPage": {
+            "title": "Blogs en YourPart",
+            "description": "Blogs públicos, entradas y contenido comunitario en YourPart.",
+            "keywords": "blog, YourPart, comunidad"
+        },
+        "blogPost": {
+            "pageTitle": "{title} | Blog en YourPart"
+        }
+    }
+}
diff --git a/frontend/src/main.js b/frontend/src/main.js
index 57cb43a..ad47c77 100644
--- a/frontend/src/main.js
+++ b/frontend/src/main.js
@@ -4,6 +4,7 @@ import store from './store';
 import router from './router';
 import './assets/styles.scss';
 import i18n from './i18n';
+import { setSeoI18nAccessor, applyRouteSeo } from './utils/seo';
 import { createVuetify } from 'vuetify';
 import * as components from 'vuetify/components';
 import * as directives from 'vuetify/directives';
@@ -53,7 +54,28 @@ function getBrowserLanguage() {
 
 const SUPPORTED_UI_LOCALES = ['de', 'en', 'ceb', 'es'];
 
+function readLangFromUrl() {
+    try {
+        const q = new URLSearchParams(window.location.search).get('lang');
+        if (q && SUPPORTED_UI_LOCALES.includes(q)) {
+            return q;
+        }
+    } catch (_) {
+        /* ignore */
+    }
+    return null;
+}
+
 function getInitialAppLanguage() {
+    const fromUrl = readLangFromUrl();
+    if (fromUrl) {
+        try {
+            localStorage.setItem('uiLanguage', fromUrl);
+        } catch (_) {
+            /* ignore */
+        }
+        return fromUrl;
+    }
     try {
         const saved = localStorage.getItem('uiLanguage');
         if (saved && SUPPORTED_UI_LOCALES.includes(saved)) {
@@ -72,6 +94,19 @@ const vuetify = createVuetify({
 
 store.dispatch('setLanguage', getInitialAppLanguage());
 
+setSeoI18nAccessor(() => ({
+    t: (...args) => i18n.global.t(...args),
+    te: (...args) => i18n.global.te(...args),
+    locale: store.state.language,
+}));
+
+store.watch(
+    (state) => state.language,
+    () => {
+        applyRouteSeo(router.currentRoute.value);
+    }
+);
+
 const app = createApp(App);
 
 app.use(store);
diff --git a/frontend/src/router/blogRoutes.js b/frontend/src/router/blogRoutes.js
index c9d3051..bb1ecb3 100644
--- a/frontend/src/router/blogRoutes.js
+++ b/frontend/src/router/blogRoutes.js
@@ -1,7 +1,6 @@
 const BlogListView = () => import('@/views/blog/BlogListView.vue');
 const BlogView = () => import('@/views/blog/BlogView.vue');
 const BlogEditorView = () => import('@/views/blog/BlogEditorView.vue');
-import { buildAbsoluteUrl } from '@/utils/seo.js';
 
 export default [
   { path: '/blogs/create', name: 'BlogCreate', component: BlogEditorView, meta: { requiresAuth: true } },
@@ -14,8 +13,7 @@ export default [
     props: route => ({ slug: route.params.slug }),
     meta: {
       seo: {
-        title: 'Blogs auf YourPart',
-        description: 'Öffentliche Blogs, Beiträge und Community-Inhalte auf YourPart.',
+        i18nKey: 'blogPage',
       },
     },
   },
@@ -27,8 +25,7 @@ export default [
     props: true,
     meta: {
       seo: {
-        title: 'Blogs auf YourPart',
-        description: 'Öffentliche Blogs, Beiträge und Community-Inhalte auf YourPart.',
+        i18nKey: 'blogPage',
       },
     },
   },
@@ -38,20 +35,8 @@ export default [
     component: BlogListView,
     meta: {
       seo: {
-        title: 'Blogs auf YourPart - Community-Beiträge und Themen',
-        description: 'Entdecke öffentliche Blogs auf YourPart mit Community-Beiträgen, Gedanken, Erfahrungen und Themen aus verschiedenen Bereichen.',
-        keywords: 'Blogs, Community Blog, Artikel, Beiträge, YourPart',
+        i18nKey: 'blogList',
         canonicalPath: '/blogs',
-        jsonLd: [
-          {
-            '@context': 'https://schema.org',
-            '@type': 'CollectionPage',
-            name: 'Blogs auf YourPart',
-            url: buildAbsoluteUrl('/blogs'),
-            description: 'Öffentliche Blogs und Community-Beiträge auf YourPart.',
-            inLanguage: 'de',
-          },
-        ],
       },
     },
   },
diff --git a/frontend/src/router/index.js b/frontend/src/router/index.js
index b80df89..4c18b8d 100644
--- a/frontend/src/router/index.js
+++ b/frontend/src/router/index.js
@@ -9,7 +9,7 @@ import blogRoutes from './blogRoutes';
 import minigamesRoutes from './minigamesRoutes';
 import personalRoutes from './personalRoutes';
 import marketingRoutes from './marketingRoutes';
-import { applyRouteSeo, buildAbsoluteUrl } from '../utils/seo';
+import { applyRouteSeo } from '../utils/seo';
 import apiClient from '../utils/axios';
 
 const HomeView = () => import('../views/HomeView.vue');
@@ -21,25 +21,8 @@ const routes = [
     component: HomeView,
     meta: {
       seo: {
-        title: 'YourPart - Community, Chat, Forum, Blogs, Vokabeltrainer und Spiele',
-        description: 'YourPart ist eine Community-Plattform mit Chat, Forum, Blogs, Vokabeltrainer, dem Browser-Aufbauspiel Falukant und Minispielen.',
-        keywords: 'YourPart, Community, Chat, Forum, Blogs, Vokabeltrainer, Browsergame, Falukant, Minispiele',
+        i18nKey: 'home',
         canonicalPath: '/',
-        jsonLd: [
-          {
-            '@context': 'https://schema.org',
-            '@type': 'WebSite',
-            name: 'YourPart',
-            url: buildAbsoluteUrl('/'),
-            inLanguage: 'de',
-            description: 'Community-Plattform mit Chat, Forum, Blogs, Vokabeltrainer, Falukant und Browser-Minispielen.',
-            potentialAction: {
-              '@type': 'SearchAction',
-              target: `${buildAbsoluteUrl('/blogs')}?q={search_term_string}`,
-              'query-input': 'required name=search_term_string',
-            },
-          },
-        ],
       },
     },
   },
diff --git a/frontend/src/router/marketingRoutes.js b/frontend/src/router/marketingRoutes.js
index f100816..03c5505 100644
--- a/frontend/src/router/marketingRoutes.js
+++ b/frontend/src/router/marketingRoutes.js
@@ -1,5 +1,3 @@
-import { buildAbsoluteUrl } from '../utils/seo';
-
 const FalukantLandingView = () => import('../views/public/FalukantLandingView.vue');
 const MinigamesLandingView = () => import('../views/public/MinigamesLandingView.vue');
 const VocabLandingView = () => import('../views/public/VocabLandingView.vue');
@@ -11,26 +9,8 @@ const marketingRoutes = [
     component: FalukantLandingView,
     meta: {
       seo: {
-        title: 'Falukant - Mittelalterliches Browser-Aufbauspiel auf YourPart',
-        description: 'Falukant ist das mittelalterliche Browser-Aufbauspiel auf YourPart mit Handel, Politik, Familie, Bildung und Charakterentwicklung.',
-        keywords: 'Falukant, Browsergame, Aufbauspiel, Mittelalterspiel, Wirtschaftsspiel, Politikspiel, YourPart',
+        i18nKey: 'falukant',
         canonicalPath: '/falukant',
-        jsonLd: [
-          {
-            '@context': 'https://schema.org',
-            '@type': 'VideoGame',
-            name: 'Falukant',
-            url: buildAbsoluteUrl('/falukant'),
-            description: 'Mittelalterliches Browser-Aufbauspiel mit Handel, Politik, Familie und Charakterentwicklung.',
-            gamePlatform: 'Web Browser',
-            applicationCategory: 'Game',
-            inLanguage: 'de',
-            publisher: {
-              '@type': 'Organization',
-              name: 'YourPart',
-            },
-          },
-        ],
       },
     },
   },
@@ -40,20 +20,8 @@ const marketingRoutes = [
     component: MinigamesLandingView,
     meta: {
       seo: {
-        title: 'Minispiele auf YourPart - Match 3 und Taxi im Browser',
-        description: 'Entdecke die Browser-Minispiele auf YourPart: Match 3 und Taxi bieten schnelle Spielrunden direkt auf der Plattform.',
-        keywords: 'Minispiele, Browsergames, Match 3, Taxi Spiel, Casual Games, YourPart',
+        i18nKey: 'minigames',
         canonicalPath: '/minigames',
-        jsonLd: [
-          {
-            '@context': 'https://schema.org',
-            '@type': 'CollectionPage',
-            name: 'YourPart Minispiele',
-            url: buildAbsoluteUrl('/minigames'),
-            description: 'Browser-Minispiele auf YourPart mit Match 3 und Taxi.',
-            inLanguage: 'de',
-          },
-        ],
       },
     },
   },
@@ -63,22 +31,8 @@ const marketingRoutes = [
     component: VocabLandingView,
     meta: {
       seo: {
-        title: 'Vokabeltrainer auf YourPart - Sprachen online lernen',
-        description: 'Der Vokabeltrainer auf YourPart unterstützt dich beim Sprachenlernen mit interaktiven Lektionen, Kursen und Übungen.',
-        keywords: 'Vokabeltrainer, Sprachen lernen, Online lernen, Sprachkurse, Übungen, YourPart',
+        i18nKey: 'vocab',
         canonicalPath: '/vokabeltrainer',
-        jsonLd: [
-          {
-            '@context': 'https://schema.org',
-            '@type': 'SoftwareApplication',
-            name: 'YourPart Vokabeltrainer',
-            url: buildAbsoluteUrl('/vokabeltrainer'),
-            description: 'Interaktiver Vokabeltrainer mit Kursen, Lektionen und Übungen zum Sprachenlernen.',
-            applicationCategory: 'EducationalApplication',
-            operatingSystem: 'Web',
-            inLanguage: 'de',
-          },
-        ],
       },
     },
   },
diff --git a/frontend/src/utils/seo.js b/frontend/src/utils/seo.js
index 0a9d9cb..a86e83a 100644
--- a/frontend/src/utils/seo.js
+++ b/frontend/src/utils/seo.js
@@ -5,6 +5,22 @@ const DEFAULT_SITE_NAME = 'YourPart';
 const DEFAULT_TITLE = 'YourPart - Community, Chat, Forum, Vokabeltrainer, Falukant und Minispiele';
 const DEFAULT_DESCRIPTION = 'YourPart verbindet Community, Chat, Forum, Blogs, Vokabeltrainer, das Aufbauspiel Falukant und Browser-Minispiele auf einer Plattform.';
 const DEFAULT_IMAGE = `${DEFAULT_BASE_URL}/images/logos/logo.png`;
+const SEO_UI_LOCALES = ['de', 'en', 'es', 'ceb'];
+
+const HREFLANG_FOR_UI = {
+  de: 'de',
+  en: 'en',
+  es: 'es',
+  ceb: 'ceb',
+};
+
+const OG_LOCALE_FOR_UI = {
+  de: 'de_DE',
+  en: 'en_GB',
+  es: 'es_ES',
+  ceb: 'ceb_PH',
+};
+
 const MANAGED_META_KEYS = [
   ['name', 'description'],
   ['name', 'keywords'],
@@ -22,6 +38,13 @@ const MANAGED_META_KEYS = [
   ['property', 'og:image'],
 ];
 
+/** @type {null | (() => { t: Function, te: Function, locale: string })} */
+let getSeoI18n = null;
+
+export function setSeoI18nAccessor(fn) {
+  getSeoI18n = typeof fn === 'function' ? fn : null;
+}
+
 function getBaseUrl() {
   return getPublicBaseUrl().replace(/\/$/, '') || DEFAULT_BASE_URL;
 }
@@ -50,6 +73,14 @@ function clearManagedJsonLd() {
   document.head.querySelectorAll('script[data-seo-managed="true"]').forEach((node) => node.remove());
 }
 
+function clearManagedHreflang() {
+  document.head.querySelectorAll('link[data-seo-managed="hreflang"]').forEach((node) => node.remove());
+}
+
+function clearManagedOgLocaleAlternates() {
+  document.head.querySelectorAll('meta[data-seo-managed="og-locale-alt"]').forEach((node) => node.remove());
+}
+
 export function buildAbsoluteUrl(path = '/') {
   if (/^https?:\/\//i.test(path)) {
     return path;
@@ -59,6 +90,159 @@ export function buildAbsoluteUrl(path = '/') {
   return `${getBaseUrl()}${normalizedPath}`;
 }
 
+/**
+ * URL für hreflang: Deutsch ohne ?lang=, andere Sprachen mit ?lang=.
+ */
+export function buildHreflangUrl(canonicalPath = '/', uiLocale = 'de') {
+  const base = buildAbsoluteUrl(canonicalPath).split('?')[0];
+  if (uiLocale === 'de') {
+    return base;
+  }
+  const sep = base.includes('?') ? '&' : '?';
+  return `${base}${sep}lang=${encodeURIComponent(uiLocale)}`;
+}
+
+function appendHreflangAlternate(canonicalPath) {
+  SEO_UI_LOCALES.forEach((ui) => {
+    const link = document.createElement('link');
+    link.setAttribute('rel', 'alternate');
+    link.setAttribute('hreflang', HREFLANG_FOR_UI[ui] || ui);
+    link.setAttribute('href', buildHreflangUrl(canonicalPath, ui));
+    link.dataset.seoManaged = 'hreflang';
+    document.head.appendChild(link);
+  });
+  const xDefault = document.createElement('link');
+  xDefault.setAttribute('rel', 'alternate');
+  xDefault.setAttribute('hreflang', 'x-default');
+  xDefault.setAttribute('href', buildHreflangUrl(canonicalPath, 'de'));
+  xDefault.dataset.seoManaged = 'hreflang';
+  document.head.appendChild(xDefault);
+}
+
+function appendOgLocaleAlternates(currentOgLocale) {
+  const used = new Set([currentOgLocale]);
+  Object.values(OG_LOCALE_FOR_UI).forEach((og) => {
+    if (used.has(og)) {
+      return;
+    }
+    used.add(og);
+    const meta = document.createElement('meta');
+    meta.setAttribute('property', 'og:locale:alternate');
+    meta.setAttribute('content', og);
+    meta.dataset.seoManaged = 'og-locale-alt';
+    document.head.appendChild(meta);
+  });
+}
+
+function uiLocaleToOgLocale(ui) {
+  return OG_LOCALE_FOR_UI[ui] || OG_LOCALE_FOR_UI.de;
+}
+
+/** OpenGraph locale (z. B. de_DE) aus UI-Sprache (de|en|es|ceb). */
+export function seoOgLocale(ui) {
+  return uiLocaleToOgLocale(ui);
+}
+
+export function seoHtmlLang(ui) {
+  return uiLocaleToHtmlLang(ui);
+}
+
+function uiLocaleToHtmlLang(ui) {
+  return HREFLANG_FOR_UI[ui] || 'de';
+}
+
+export function seoSchemaLang(ui) {
+  return HREFLANG_FOR_UI[ui] || 'de';
+}
+
+/**
+ * JSON-LD für öffentliche Marketing-/Start-Routen (sprachabhängig).
+ */
+export function buildRouteJsonLd(route, t, uiLocale) {
+  const lang = seoSchemaLang(uiLocale);
+  const name = route.name;
+
+  if (name === 'Home') {
+    return [
+      {
+        '@context': 'https://schema.org',
+        '@type': 'WebSite',
+        name: DEFAULT_SITE_NAME,
+        url: buildAbsoluteUrl('/'),
+        inLanguage: lang,
+        description: t('seo.home.jsonLdDescription'),
+        potentialAction: {
+          '@type': 'SearchAction',
+          target: `${buildAbsoluteUrl('/blogs')}?q={search_term_string}`,
+          'query-input': 'required name=search_term_string',
+        },
+      },
+    ];
+  }
+
+  if (name === 'FalukantLanding') {
+    return [
+      {
+        '@context': 'https://schema.org',
+        '@type': 'VideoGame',
+        name: t('seo.falukant.jsonLdName'),
+        url: buildAbsoluteUrl('/falukant'),
+        description: t('seo.falukant.jsonLdDescription'),
+        gamePlatform: 'Web Browser',
+        applicationCategory: 'Game',
+        inLanguage: lang,
+        publisher: {
+          '@type': 'Organization',
+          name: DEFAULT_SITE_NAME,
+        },
+      },
+    ];
+  }
+
+  if (name === 'MinigamesLanding') {
+    return [
+      {
+        '@context': 'https://schema.org',
+        '@type': 'CollectionPage',
+        name: t('seo.minigames.jsonLdCollectionName'),
+        url: buildAbsoluteUrl('/minigames'),
+        description: t('seo.minigames.jsonLdDescription'),
+        inLanguage: lang,
+      },
+    ];
+  }
+
+  if (name === 'VocabLanding') {
+    return [
+      {
+        '@context': 'https://schema.org',
+        '@type': 'SoftwareApplication',
+        name: t('seo.vocab.jsonLdName'),
+        url: buildAbsoluteUrl('/vokabeltrainer'),
+        description: t('seo.vocab.jsonLdDescription'),
+        applicationCategory: 'EducationalApplication',
+        operatingSystem: 'Web',
+        inLanguage: lang,
+      },
+    ];
+  }
+
+  if (name === 'BlogList') {
+    return [
+      {
+        '@context': 'https://schema.org',
+        '@type': 'CollectionPage',
+        name: t('seo.blogList.jsonLdName'),
+        url: buildAbsoluteUrl('/blogs'),
+        description: t('seo.blogList.jsonLdDescription'),
+        inLanguage: lang,
+      },
+    ];
+  }
+
+  return [];
+}
+
 export function stripHtml(html = '') {
   return html
     .replace(/<style[\s\S]*?<\/style>/gi, ' ')
@@ -114,6 +298,13 @@ export function applySeo(overrides = {}) {
   upsertMeta('property', 'og:image', image);
   upsertLink('canonical', canonical);
 
+  clearManagedHreflang();
+  clearManagedOgLocaleAlternates();
+  if (overrides.includeHreflangAlternates) {
+    appendHreflangAlternate(overrides.canonicalPath || '/');
+    appendOgLocaleAlternates(locale);
+  }
+
   clearManagedJsonLd();
   for (const payload of overrides.jsonLd || []) {
     const script = document.createElement('script');
@@ -127,23 +318,64 @@ export function applySeo(overrides = {}) {
 export function applyRouteSeo(route) {
   const seo = route.meta?.seo || {};
   const isProtected = !!route.meta?.requiresAuth;
-
-  const title = seo.title || DEFAULT_TITLE;
-  const description = seo.description || DEFAULT_DESCRIPTION;
   const canonicalPath = seo.canonicalPath || route.path || '/';
   const robots = seo.robots || route.meta?.robots || (isProtected ? 'noindex, nofollow' : 'index, follow');
 
+  const accessor = getSeoI18n ? getSeoI18n() : null;
+  const i18nKey = seo.i18nKey;
+  const prefix = i18nKey ? `seo.${i18nKey}` : '';
+
+  let title = DEFAULT_TITLE;
+  let description = DEFAULT_DESCRIPTION;
+  let keywords;
+  let jsonLd = [];
+
+  if (accessor && prefix && accessor.te(`${prefix}.title`)) {
+    title = accessor.t(`${prefix}.title`);
+    description = accessor.te(`${prefix}.description`)
+      ? accessor.t(`${prefix}.description`)
+      : DEFAULT_DESCRIPTION;
+    if (accessor.te(`${prefix}.keywords`)) {
+      keywords = accessor.t(`${prefix}.keywords`);
+    } else if (accessor.te('seo.default.keywords')) {
+      keywords = accessor.t('seo.default.keywords');
+    }
+    if (!isProtected) {
+      jsonLd = buildRouteJsonLd(route, accessor.t, accessor.locale);
+    }
+  } else {
+    title = seo.title || DEFAULT_TITLE;
+    description = seo.description || DEFAULT_DESCRIPTION;
+    keywords = seo.keywords;
+    if (!isProtected) {
+      jsonLd = seo.jsonLd || [];
+    }
+  }
+
+  if (accessor && accessor.te('seo.default.title') && title === DEFAULT_TITLE && !seo.title) {
+    title = accessor.t('seo.default.title');
+  }
+  if (accessor && accessor.te('seo.default.description') && description === DEFAULT_DESCRIPTION && !seo.description) {
+    description = accessor.t('seo.default.description');
+  }
+  if (!keywords && accessor?.te('seo.default.keywords')) {
+    keywords = accessor.t('seo.default.keywords');
+  }
+
+  const uiLocale = accessor?.locale && SEO_UI_LOCALES.includes(accessor.locale) ? accessor.locale : 'de';
+
   applySeo({
     title,
     description,
     canonicalPath,
-    keywords: seo.keywords,
+    keywords,
     robots,
     type: seo.type,
     image: seo.image,
-    locale: seo.locale,
-    lang: seo.lang,
-    jsonLd: isProtected ? [] : (seo.jsonLd || []),
+    locale: uiLocaleToOgLocale(uiLocale),
+    lang: uiLocaleToHtmlLang(uiLocale),
+    jsonLd,
+    includeHreflangAlternates: !isProtected,
   });
 }
 
@@ -157,4 +389,6 @@ export function resetSeo() {
 
   document.head.querySelector('link[rel="canonical"]')?.remove();
   clearManagedJsonLd();
+  clearManagedHreflang();
+  clearManagedOgLocaleAlternates();
 }
diff --git a/frontend/src/views/blog/BlogView.vue b/frontend/src/views/blog/BlogView.vue
index 5349eb9..ce570ef 100644
--- a/frontend/src/views/blog/BlogView.vue
+++ b/frontend/src/views/blog/BlogView.vue
@@ -46,7 +46,16 @@
 import { getBlog, listPosts, createPost } from '@/api/blogApi.js';
 import DOMPurify from 'dompurify';
 import RichTextEditor from './components/RichTextEditor.vue';
-import { applySeo, buildAbsoluteUrl, createBlogSlug, stripHtml, truncateText } from '@/utils/seo.js';
+import {
+  applySeo,
+  buildAbsoluteUrl,
+  createBlogSlug,
+  stripHtml,
+  truncateText,
+  seoSchemaLang,
+  seoOgLocale,
+  seoHtmlLang,
+} from '@/utils/seo.js';
 export default {
   name: 'BlogView',
   props: { id: String, slug: String },
@@ -92,13 +101,20 @@ export default {
       const summarySource = this.blog.description || plainTextPosts || this.$t('blog.view.fallbackDescription');
       const description = truncateText(summarySource, 160);
       const canonicalPath = this.canonicalBlogPath();
+      const uiLang = this.$store.state.language;
+      const pageTitle = this.$te('seo.blogPost.pageTitle')
+        ? this.$t('seo.blogPost.pageTitle', { title: this.blog.title })
+        : `${this.blog.title} | YourPart`;
 
       applySeo({
-        title: `${this.blog.title} | Blog auf YourPart`,
+        title: pageTitle,
         description,
         canonicalPath,
         keywords: `Blog, ${this.blog.title}, ${this.blog.owner?.username || 'YourPart'}, Community`,
         type: 'article',
+        locale: seoOgLocale(uiLang),
+        lang: seoHtmlLang(uiLang),
+        includeHreflangAlternates: true,
         jsonLd: [
           {
             '@context': 'https://schema.org',
@@ -106,7 +122,7 @@ export default {
             name: this.blog.title,
             description,
             url: buildAbsoluteUrl(canonicalPath),
-            inLanguage: 'de',
+            inLanguage: seoSchemaLang(uiLang),
             author: this.blog.owner?.username
               ? {
                   '@type': 'Person',
@@ -150,6 +166,9 @@ export default {
         description: this.$t('blog.view.notFoundDescription'),
         canonicalPath: '/blogs',
         robots: 'noindex, nofollow',
+        locale: seoOgLocale(this.$store.state.language),
+        lang: seoHtmlLang(this.$store.state.language),
+        includeHreflangAlternates: true,
       });
     } finally { this.loading = false; }
     },
diff --git a/update.sh b/update.sh
index 64dfc40..d3774a8 100755
--- a/update.sh
+++ b/update.sh
@@ -44,10 +44,14 @@ echo ""
 echo "=== Building and Updating Frontend ==="
 ./update-frontend.sh "$TARGET_DIR"
 
+echo ""
+echo "Link backend .env"
+ln -s backend/.env .env
+
 echo ""
 echo "=== Update Completed! ==="
 echo "Your application has been updated."
 echo ""
 echo "To check logs:"
 echo "  Backend: sudo journalctl -u yourpart.service -f"
-echo "  Apache:  sudo tail -f /var/log/apache2/yourpart.*.log"
\ No newline at end of file
+echo "  Apache:  sudo tail -f /var/log/apache2/yourpart.*.log"
