diff --git a/packages/ui/src/lib/i18n/messages/de.settings.ts b/packages/ui/src/lib/i18n/messages/de.settings.ts
index 0558eaa5..e0ed121c 100644
--- a/packages/ui/src/lib/i18n/messages/de.settings.ts
+++ b/packages/ui/src/lib/i18n/messages/de.settings.ts
@@ -1,6 +1,4 @@
-import type { I18nDictionary } from '../types';
-
-export const settingsDict: Partial<I18nDictionary> = {
+export const settingsDict = {
   'settings.providers.page.openCodeGo.title': 'OpenCode Go Nutzungsverfolgung',
   'settings.providers.page.openCodeGo.description': 'Verbinden Sie das OpenCode Go Dashboard, um rollierenden, wöchentlichen und monatlichen Verbrauch anzuzeigen.',
   'settings.providers.page.openCodeGo.workspaceId': 'Workspace-ID',
diff --git a/packages/ui/src/lib/i18n/messages/de.ts b/packages/ui/src/lib/i18n/messages/de.ts
index 57aaad1a..5873f24f 100644
--- a/packages/ui/src/lib/i18n/messages/de.ts
+++ b/packages/ui/src/lib/i18n/messages/de.ts
@@ -1,7 +1,6 @@
 import { settingsDict } from './de.settings';
-import type { I18nDictionary } from '../types';
 
-export const dict: Partial<I18nDictionary> = {
+export const dict = {
   ...settingsDict,
   'common.language.german': 'Deutsch',
   'chat.message.userText.collapseAria': 'Benutzer-Nachricht einklappen',
diff --git a/packages/ui/src/lib/i18n/runtime.ts b/packages/ui/src/lib/i18n/runtime.ts
index 983ea2ca..7e131bf5 100644
--- a/packages/ui/src/lib/i18n/runtime.ts
+++ b/packages/ui/src/lib/i18n/runtime.ts
@@ -60,6 +60,9 @@ export function normalizeLocale(value: string | undefined | null): Locale {
   if (normalized === 'ja' || normalized.startsWith('ja-')) {
     return 'ja';
   }
+  if (normalized === 'de' || normalized.startsWith('de-')) {
+    return 'de';
+  }
   if (normalized === 'pl' || normalized.startsWith('pl-')) {
     return 'pl';
   }
diff --git a/packages/ui/src/lib/i18n/store.ts b/packages/ui/src/lib/i18n/store.ts
index e2e0c3a5..19a2eb27 100644
--- a/packages/ui/src/lib/i18n/store.ts
+++ b/packages/ui/src/lib/i18n/store.ts
@@ -43,10 +43,10 @@ async function loadDictionary(locale: Locale): Promise<I18nDictionary> {
               : locale === 'pl'
                 ? await import('./messages/pl') as { dict: I18nDictionary }
                 : locale === 'de'
-      ? await import('./messages/de') as { dict: I18nDictionary }
-      : locale === 'ja'
-                  ? await import('./messages/ja') as { dict: I18nDictionary }
-                  : { dict: enDict };
+                  ? await import('./messages/de') as { dict: I18nDictionary }
+                  : locale === 'ja'
+                    ? await import('./messages/ja') as { dict: I18nDictionary }
+                    : { dict: enDict };
   dictionaries.set(locale, mod.dict);
   return mod.dict;
 }