diff --git a/app/Http/Controllers/Api/Tenant/PhotoboothController.php b/app/Http/Controllers/Api/Tenant/PhotoboothController.php
index 68b2fdc..9676ba0 100644
--- a/app/Http/Controllers/Api/Tenant/PhotoboothController.php
+++ b/app/Http/Controllers/Api/Tenant/PhotoboothController.php
@@ -9,6 +9,7 @@ use App\Mail\PhotoboothUploaderDownload;
 use App\Models\Event;
 use App\Models\PhotoboothSetting;
 use App\Services\Photobooth\PhotoboothProvisioner;
+use App\Support\LocaleConfig;
 use Illuminate\Http\JsonResponse;
 use Illuminate\Http\Request;
 use Illuminate\Support\Facades\Mail;
@@ -85,7 +86,7 @@ class PhotoboothController extends Controller
             ]);
         }
 
-        $locale = $user->preferred_locale ?: app()->getLocale();
+        $locale = LocaleConfig::canonicalize($user->preferred_locale ?: app()->getLocale());
         $eventName = $this->resolveEventName($event, $locale);
         $recipientName = $user->fullName ?? $user->name ?? $user->email;