diff --git a/apps/app_seeds/lib/app.dart b/apps/app_seeds/lib/app.dart
index 9becb1e..56fa473 100644
--- a/apps/app_seeds/lib/app.dart
+++ b/apps/app_seeds/lib/app.dart
@@ -267,7 +267,6 @@ class TaneApp extends StatelessWidget {
 /// localizations can serve. Asturian (`ast`) has none, so it borrows Spanish
 /// (`es`) for the framework chrome; the app's own strings stay Asturian (they
 /// come from slang, not from `Localizations`). All other locales pass through.
-@visibleForTesting
 Locale materialLocaleFor(Locale locale) =>
     locale.languageCode == 'ast' ? const Locale('es') : locale;
 
diff --git a/apps/app_seeds/lib/bootstrap.dart b/apps/app_seeds/lib/bootstrap.dart
index 2dfe373..e8a2430 100644
--- a/apps/app_seeds/lib/bootstrap.dart
+++ b/apps/app_seeds/lib/bootstrap.dart
@@ -112,7 +112,9 @@ class BootstrapSplash extends StatelessWidget {
     return MaterialApp(
       debugShowCheckedModeBanner: false,
       theme: buildTaneTheme(),
-      locale: TranslationProvider.of(context).flutterLocale,
+      // Asturian (`ast`) has no bundled Material/Cupertino localizations, so map
+      // it to Spanish for the framework chrome — same as the main app (app.dart).
+      locale: materialLocaleFor(TranslationProvider.of(context).flutterLocale),
       supportedLocales: AppLocaleUtils.supportedLocales,
       localizationsDelegates: const [
         GlobalMaterialLocalizations.delegate,