diff --git a/core/lib/Drupal/Core/Language/LanguageManager.php b/core/lib/Drupal/Core/Language/LanguageManager.php
index 27c93c7..22c5289 100644
--- a/core/lib/Drupal/Core/Language/LanguageManager.php
+++ b/core/lib/Drupal/Core/Language/LanguageManager.php
@@ -398,8 +398,18 @@ protected function filterLanguages(array $languages, $flags = LanguageInterface:
     // Add the site's default language if requested.
     if ($flags & LanguageInterface::STATE_SITE_DEFAULT) {
 
-      // Setup a language to have the defaults
-      $default = $this->getDefaultLanguage();
+      // Setup a language to have the defaults with data appropriate of the
+      // default language only for runtime.
+      $defaultLanguage = $this->getDefaultLanguage();
+      $default = new Language(
+        array(
+          'id' => $defaultLanguage->getId(),
+          'name' => $this->t("Site's default language (@lang_name)",
+            array('@lang_name' => $defaultLanguage->getName())),
+          'direction' => $defaultLanguage->getDirection(),
+          'weight' => $defaultLanguage->getWeight(),
+        )
+      );
       $filtered_languages[LanguageInterface::LANGCODE_SITE_DEFAULT] = $default;
     }