diff --git a/CHANGELOG.md b/CHANGELOG.md
index 40e36bf1..a7819716 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,9 @@ and this project adheres to
 - 🚸(backend) make document search on title accent-insensitive #874
 - 🚩 add homepage feature flag #861
 
+## Changed
+
+⚡️(frontend) reduce unblocking time for config #867
 
 ## [3.1.0] - 2025-04-07
 
diff --git a/src/frontend/apps/impress/src/core/config/api/useConfig.tsx b/src/frontend/apps/impress/src/core/config/api/useConfig.tsx
index aa364877..03c43fea 100644
--- a/src/frontend/apps/impress/src/core/config/api/useConfig.tsx
+++ b/src/frontend/apps/impress/src/core/config/api/useConfig.tsx
@@ -19,6 +19,21 @@ interface ConfigResponse {
   SENTRY_DSN?: string;
 }
 
+const LOCAL_STORAGE_KEY = 'docs_config';
+
+function getCachedTranslation() {
+  try {
+    const jsonString = localStorage.getItem(LOCAL_STORAGE_KEY);
+    return jsonString ? (JSON.parse(jsonString) as ConfigResponse) : undefined;
+  } catch {
+    return undefined;
+  }
+}
+
+function setCachedTranslation(translations: ConfigResponse) {
+  localStorage.setItem(LOCAL_STORAGE_KEY, JSON.stringify(translations));
+}
+
 export const getConfig = async (): Promise<ConfigResponse> => {
   const response = await fetchAPI(`config/`);
 
@@ -26,15 +41,25 @@ export const getConfig = async (): Promise<ConfigResponse> => {
     throw new APIError('Failed to get the doc', await errorCauses(response));
   }
 
-  return response.json() as Promise<ConfigResponse>;
+  const config = response.json() as Promise<ConfigResponse>;
+  setCachedTranslation(await config);
+
+  return config;
 };
 
 export const KEY_CONFIG = 'config';
 
 export function useConfig() {
-  return useQuery<ConfigResponse, APIError, ConfigResponse>({
+  const cachedData = getCachedTranslation();
+  const oneHour = 1000 * 60 * 60;
+
+  const response = useQuery<ConfigResponse, APIError, ConfigResponse>({
     queryKey: [KEY_CONFIG],
     queryFn: () => getConfig(),
-    staleTime: Infinity,
+    initialData: cachedData,
+    staleTime: oneHour,
+    initialDataUpdatedAt: Date.now() - oneHour, // Force initial data to be considered stale
   });
+
+  return response;
 }
diff --git a/src/frontend/apps/impress/src/features/language/hooks/useLanguageSynchronizer.ts b/src/frontend/apps/impress/src/features/language/hooks/useLanguageSynchronizer.ts
index 536e2e72..e6bb23b9 100644
--- a/src/frontend/apps/impress/src/features/language/hooks/useLanguageSynchronizer.ts
+++ b/src/frontend/apps/impress/src/features/language/hooks/useLanguageSynchronizer.ts
@@ -16,7 +16,7 @@ export const useLanguageSynchronizer = () => {
 
   const availableBackendLanguages = useMemo(() => {
     return conf?.LANGUAGES.map(([locale]) => locale);
-  }, [conf]);
+  }, [conf?.LANGUAGES]);
 
   const synchronizeLanguage = useCallback(
     async (direction?: 'toBackend' | 'toFrontend') => {