diff --git a/package.json b/package.json
index a2884450..6e162df9 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "homepage",
-	"version": "1.56.2",
+	"version": "1.57.0",
 	"private": true,
 	"type": "module",
 	"scripts": {
diff --git a/src/lib/components/DatePicker.svelte b/src/lib/components/DatePicker.svelte
index 1468969d..323cfadc 100644
--- a/src/lib/components/DatePicker.svelte
+++ b/src/lib/components/DatePicker.svelte
@@ -2,7 +2,10 @@
 	import ChevronLeft from '@lucide/svelte/icons/chevron-left';
 	import ChevronRight from '@lucide/svelte/icons/chevron-right';
 	import Calendar from '@lucide/svelte/icons/calendar';
+	import { m } from '$lib/js/commonI18n';
+	/** @typedef {import('$lib/js/commonI18n').CommonLang} CommonLang */
 	let { value = $bindable(''), lang = 'en', min = '', max = '' } = $props();
+	const t = $derived(m[/** @type {CommonLang} */ (lang)]);
 
 	let open = $state(false);
 	/** @type {HTMLDivElement | null} */
@@ -35,8 +38,8 @@
 	const todayStr = new Date().toISOString().slice(0, 10);
 
 	const displayDate = $derived.by(() => {
-		if (!value) return lang === 'en' ? 'Select date' : 'Datum wählen';
-		if (value === todayStr) return lang === 'en' ? 'Today' : 'Heute';
+		if (!value) return t.select_date;
+		if (value === todayStr) return t.today;
 		const d = new Date(value + 'T12:00:00');
 		return d.toLocaleDateString(lang === 'de' ? 'de-DE' : 'en-US', { weekday: 'short', month: 'short', day: 'numeric' });
 	});
@@ -182,7 +185,7 @@
 
 			{#if value !== todayStr}
 				<button type="button" class="dp-today-btn" onclick={goToday}>
-					{lang === 'en' ? 'Today' : 'Heute'}
+					{t.today}
 				</button>
 			{/if}
 		</div>
diff --git a/src/lib/components/ErrorView.svelte b/src/lib/components/ErrorView.svelte
index 1b1f0c11..b67f3089 100644
--- a/src/lib/components/ErrorView.svelte
+++ b/src/lib/components/ErrorView.svelte
@@ -5,6 +5,7 @@
   import SearchX from '@lucide/svelte/icons/search-x';
   import TriangleAlert from '@lucide/svelte/icons/triangle-alert';
   import CircleAlert from '@lucide/svelte/icons/circle-alert';
+  import { m } from '$lib/js/commonI18n';
   interface BibleQuote {
     text: string;
     reference: string;
@@ -43,6 +44,7 @@
   }
 
   let Icon = $derived(icon ?? defaultIcon(status));
+  const t = $derived(m[isEnglish ? 'en' : 'de']);
   let openQuote = $derived(isEnglish ? '\u201C' : '\u201E');
   let closeQuote = $derived(isEnglish ? '\u201D' : '\u201C');
 </script>
@@ -52,7 +54,7 @@
     <header class="eyebrow">
       <Icon size={14} strokeWidth={1.5} aria-hidden="true" />
       <span class="eyebrow-label">
-        {isEnglish ? 'Error' : 'Fehler'}
+        {t.error_label}
       </span>
     </header>
 
diff --git a/src/lib/components/OfflineSyncButton.svelte b/src/lib/components/OfflineSyncButton.svelte
index 549c84d9..f65bfdc9 100644
--- a/src/lib/components/OfflineSyncButton.svelte
+++ b/src/lib/components/OfflineSyncButton.svelte
@@ -1,20 +1,22 @@
 <script lang="ts">
 	import { onMount } from 'svelte';
 	import { pwaStore } from '$lib/stores/pwa.svelte';
+	import { m, type CommonLang } from '$lib/js/commonI18n';
 
 	let { lang = 'de' }: { lang?: string } = $props();
 
 	let showTooltip = $state(false);
 	let mounted = $state(false);
 
+	const t = $derived(m[lang as CommonLang]);
 	const labels = $derived({
-		syncForOffline: lang === 'en' ? 'Save for offline' : 'Offline speichern',
-		syncing: lang === 'en' ? 'Syncing...' : 'Synchronisiere...',
-		offlineReady: lang === 'en' ? 'Offline ready' : 'Offline bereit',
-		lastSync: lang === 'en' ? 'Last sync' : 'Letzte Sync',
-		recipes: lang === 'en' ? 'recipes' : 'Rezepte',
-		syncNow: lang === 'en' ? 'Sync now' : 'Jetzt synchronisieren',
-		clearData: lang === 'en' ? 'Clear offline data' : 'Offline-Daten löschen'
+		syncForOffline: t.sync_for_offline,
+		syncing: t.syncing,
+		offlineReady: t.offline_ready,
+		lastSync: t.last_sync,
+		recipes: t.recipes_word,
+		syncNow: t.sync_now,
+		clearData: t.clear_offline_data
 	});
 
 	onMount(async () => {
diff --git a/src/lib/components/UserHeader.svelte b/src/lib/components/UserHeader.svelte
index f9cc5c09..d6af3144 100644
--- a/src/lib/components/UserHeader.svelte
+++ b/src/lib/components/UserHeader.svelte
@@ -4,8 +4,10 @@
 	import { page } from '$app/state';
 	import { browser } from '$app/environment';
 	import LogIn from '@lucide/svelte/icons/log-in';
+	import { m, type CommonLang } from '$lib/js/commonI18n';
 
 	let { user, recipeLang = 'rezepte', lang = 'de' } = $props();
+	const t = $derived(m[lang as CommonLang]);
 
 	function toggle_options(){
 		const el = document.querySelector("#options-wrap") as HTMLElement | null;
@@ -167,8 +169,8 @@
 	<a
 		class="entry login-link"
 		href={`${resolve('/login')}?callbackUrl=${encodeURIComponent(page.url.pathname + (browser ? page.url.search : ''))}`}
-		aria-label={lang === 'de' ? 'Anmelden' : 'Login'}
-		title={lang === 'de' ? 'Anmelden' : 'Login'}
+		aria-label={t.login}
+		title={t.login}
 	>
 		<LogIn size={18} />
 	</a>
diff --git a/src/lib/i18n/common/de.ts b/src/lib/i18n/common/de.ts
new file mode 100644
index 00000000..e1e1a098
--- /dev/null
+++ b/src/lib/i18n/common/de.ts
@@ -0,0 +1,37 @@
+/** German common UI strings — source of truth for the key set. */
+
+export const de = {
+	// Auth / user header
+	login: 'Anmelden',
+
+	// (main) homepage
+	welcome: 'Willkommen auf bocken.org',
+	pages: 'Seiten',
+	recipes: 'Rezepte',
+	family_photos: 'Familienbilder',
+	video_conferences: 'Videokonferenzen',
+	search_engine: 'Suchmaschine',
+	shopping: 'Einkauf',
+	family_tree: 'Stammbaum',
+	faith: 'Glaube',
+	documents: 'Dokumente',
+	audiobooks_podcasts: 'Hörbücher & Podcasts',
+	nutrition: 'Ernährung',
+	tasks: 'Aufgaben',
+
+	// Offline sync button
+	sync_for_offline: 'Offline speichern',
+	syncing: 'Synchronisiere…',
+	offline_ready: 'Offline bereit',
+	last_sync: 'Letzte Sync',
+	recipes_word: 'Rezepte',
+	sync_now: 'Jetzt synchronisieren',
+	clear_offline_data: 'Offline-Daten löschen',
+
+	// Date picker
+	select_date: 'Datum wählen',
+	today: 'Heute',
+
+	// Error view
+	error_label: 'Fehler'
+} as const;
diff --git a/src/lib/i18n/common/en.ts b/src/lib/i18n/common/en.ts
new file mode 100644
index 00000000..b773b2f7
--- /dev/null
+++ b/src/lib/i18n/common/en.ts
@@ -0,0 +1,37 @@
+import type { de } from './de';
+
+export const en = {
+	// Auth / user header
+	login: 'Login',
+
+	// (main) homepage
+	welcome: 'Welcome to bocken.org',
+	pages: 'Pages',
+	recipes: 'Recipes',
+	family_photos: 'Family Photos',
+	video_conferences: 'Video Conferences',
+	search_engine: 'Search Engine',
+	shopping: 'Shopping',
+	family_tree: 'Family Tree',
+	faith: 'Faith',
+	documents: 'Documents',
+	audiobooks_podcasts: 'Audiobooks & Podcasts',
+	nutrition: 'Nutrition',
+	tasks: 'Tasks',
+
+	// Offline sync button
+	sync_for_offline: 'Save for offline',
+	syncing: 'Syncing…',
+	offline_ready: 'Offline ready',
+	last_sync: 'Last sync',
+	recipes_word: 'recipes',
+	sync_now: 'Sync now',
+	clear_offline_data: 'Clear offline data',
+
+	// Date picker
+	select_date: 'Select date',
+	today: 'Today',
+
+	// Error view
+	error_label: 'Error'
+} as const satisfies Record<keyof typeof de, string>;
diff --git a/src/lib/js/commonI18n.ts b/src/lib/js/commonI18n.ts
new file mode 100644
index 00000000..43c4ec73
--- /dev/null
+++ b/src/lib/js/commonI18n.ts
@@ -0,0 +1,19 @@
+/**
+ * Shared/top-level UI strings used across the site (homepage, auth header,
+ * offline sync button, date picker, error view).
+ *
+ * Per-locale tables live in `$lib/i18n/common/{de,en}.ts`. Use
+ * `m[lang].key` (or `m[lang][expr]` for dynamic keys) directly:
+ *
+ *   import { m } from '$lib/js/commonI18n';
+ *   const t = $derived(m[lang]);
+ *   ... t.login ...
+ */
+
+import { de } from '$lib/i18n/common/de';
+import { en } from '$lib/i18n/common/en';
+
+export const m = { de, en } as const;
+
+export type CommonLang = keyof typeof m;
+export type CommonKey = keyof typeof de;
diff --git a/src/routes/(main)/+page.svelte b/src/routes/(main)/+page.svelte
index ce6baac8..6b0241c4 100644
--- a/src/routes/(main)/+page.svelte
+++ b/src/routes/(main)/+page.svelte
@@ -34,33 +34,35 @@
 		};
 	});
 
+	import { m } from '$lib/js/commonI18n';
+	const t = $derived(m[lang]);
 	const isEnglish = $derived(lang === 'en');
 	const labels = $derived({
-		welcome: isEnglish ? 'Welcome to bocken.org' : 'Willkommen auf bocken.org',
+		welcome: t.welcome,
 		intro1: isEnglish
 			? 'Hello, I\'m Alexander Bocken. On this website you\'ll find some software projects for friends, family, and myself. Everything is self-hosted at my home on a small mini-server (Arch, btw).'
 			: 'Hallo, ich bin Alexander Bocken. Auf dieser Seite findest du einige Softwareprojekte für Freunde, Familie und mich. Alles ist selbst gehostet bei mir daheim auf einem kleinen Mini-Server (Arch, btw).',
 		intro2: isEnglish
 			? 'I recommend my continuously growing recipe collection. There you\'ll find many delicious recipes that I\'ve tried myself and constantly refine. You\'re also welcome to use my search engine or Jitsi instance for video conferences. Some things are hidden behind a login, others are publicly accessible. If you know a bit about programming, feel free to browse my Git repositories.'
 			: 'Zu empfehlen ist meine stetig wachsende Rezeptsammlung. Dort findest du viele leckere Rezepte, die ich selbst ausprobiert habe und ständig weiterfeilsche. Zudem kannst du gerne meine Suchmaschine oder auch Jitsi-instanz für Videokonferenzen nutzen. Einiges ist hinter einem Login versteckt, anderes ist öffentlich zugänglich. Wer sich ein bisschen mit Programmieren auskennt, kann auch gerne in meinen Git-Repositories stöbern.',
-		pages: isEnglish ? 'Pages' : 'Seiten',
-		recipes: isEnglish ? 'Recipes' : 'Rezepte',
+		pages: t.pages,
+		recipes: t.recipes,
 		git: 'Git',
 		streaming: 'Streaming',
-		familyPhotos: isEnglish ? 'Family Photos' : 'Familienbilder',
+		familyPhotos: t.family_photos,
 		cloud: 'Cloud',
-		videoConferences: isEnglish ? 'Video Conferences' : 'Videokonferenzen',
-		searchEngine: isEnglish ? 'Search Engine' : 'Suchmaschine',
-		shopping: isEnglish ? 'Shopping' : 'Einkauf',
-		familyTree: isEnglish ? 'Family Tree' : 'Stammbaum',
-		faith: isEnglish ? 'Faith' : 'Glaube',
+		videoConferences: t.video_conferences,
+		searchEngine: t.search_engine,
+		shopping: t.shopping,
+		familyTree: t.family_tree,
+		faith: t.faith,
 		chat: 'Chat',
 		transmission: 'Transmission',
-		documents: isEnglish ? 'Documents' : 'Dokumente',
-		audiobooksPodcasts: isEnglish ? 'Audiobooks & Podcasts' : 'Hörbücher & Podcasts',
+		documents: t.documents,
+		audiobooksPodcasts: t.audiobooks_podcasts,
 		fitness: 'Fitness',
-		nutrition: isEnglish ? 'Nutrition' : 'Ernährung',
-		tasks: isEnglish ? 'Tasks' : 'Aufgaben'
+		nutrition: t.nutrition,
+		tasks: t.tasks
 	});
 </script>
 <style>