diff --git a/npm/ng-packs/packages/core/src/lib/services/localization.service.ts b/npm/ng-packs/packages/core/src/lib/services/localization.service.ts
index 0e89732e56..a3b452de11 100644
--- a/npm/ng-packs/packages/core/src/lib/services/localization.service.ts
+++ b/npm/ng-packs/packages/core/src/lib/services/localization.service.ts
@@ -33,9 +33,10 @@ export class LocalizationService {
   }
 
   private listenToSetLanguage() {
-    this.actions
-      .pipe(ofActionSuccessful(SetLanguage))
-      .subscribe(({ payload }) => this.registerLocale(payload));
+    this.actions.pipe(ofActionSuccessful(SetLanguage)).subscribe(({ payload }) => {
+      this.registerLocale(payload);
+      document.documentElement.lang = payload;
+    });
   }
 
   setRouteReuse(reuse: ShouldReuseRoute) {