diff --git a/core/modules/config_translation/tests/modules/config_translation_test/src/EventSubscriber/ConfigTranslationTestSubscriber.php b/core/modules/config_translation/tests/modules/config_translation_test/src/EventSubscriber/ConfigTranslationTestSubscriber.php
index b6800e8..9d875a4 100644
--- a/core/modules/config_translation/tests/modules/config_translation_test/src/EventSubscriber/ConfigTranslationTestSubscriber.php
+++ b/core/modules/config_translation/tests/modules/config_translation_test/src/EventSubscriber/ConfigTranslationTestSubscriber.php
@@ -15,7 +15,7 @@ static function getSubscribedEvents() {
 
   public function addConfigNames(ConfigMapperEvent $event) {
     $mapper = $event->getMapper();
-    if ($mapper->getBaseRouteName() == 'system.site_information_settings') {
+    if ($mapper->getBaseRouteName() === 'system.site_information_settings' && $mapper->getLangcode() === 'en') {
       $mapper->addConfigName('config_translation_test.content');
     }
   }