diff --git a/config/services.yaml b/config/services.yaml
index a2c36599a..f3c93f4a4 100644
--- a/config/services.yaml
+++ b/config/services.yaml
@@ -31,6 +31,7 @@ services:
     App\EventSubscriber\LocaleSubscriber:
         arguments:
             $defaultLocale: "%kernel.default_locale%"
+            $locales: "%app.locales%"
     App\Service\RegionsProvider:
         arguments:
             $projectDirectory: "%kernel.project_dir%"
diff --git a/src/EventSubscriber/LocaleSubscriber.php b/src/EventSubscriber/LocaleSubscriber.php
index c50759294..b1bbed276 100644
--- a/src/EventSubscriber/LocaleSubscriber.php
+++ b/src/EventSubscriber/LocaleSubscriber.php
@@ -8,11 +8,18 @@
 
 class LocaleSubscriber implements EventSubscriberInterface
 {
-    public function __construct(private readonly string $defaultLocale)
-    {
+    /**
+     * @param string[] $locales
+     *
+     * @return void
+     */
+    public function __construct(
+        private readonly string $defaultLocale,
+        private readonly array $locales
+    ) {
     }
 
-    public function onKernelRequest(RequestEvent $event)
+    public function onKernelRequest(RequestEvent $event): void
     {
         $request = $event->getRequest();
 
@@ -36,7 +43,12 @@ public function onKernelRequest(RequestEvent $event)
         } elseif (\count($request->getLanguages()) > 0) {
             // if we still don't have a locale defined, use the browser languages
             $languages = $request->getLanguages();
-            $request->setLocale($languages[0]);
+            foreach ($languages as $lang) {
+                if (\in_array($lang, $this->locales, true)) {
+                    $request->setLocale($lang);
+                    break;
+                }
+            }
         } else {
             // or use the default locale
             $request->setLocale($this->defaultLocale);