diff --git a/core/includes/bootstrap.inc b/core/includes/bootstrap.inc
index f308726..9510899 100644
--- a/core/includes/bootstrap.inc
+++ b/core/includes/bootstrap.inc
@@ -2675,13 +2675,12 @@ function get_t() {
 }
 
 /**
- * Initializes all the defined language types.
- *
- * @see language()
+ * Initializes all the defined language types and sets the default langcode.
  */
 function drupal_language_initialize() {
   Drupal::service('language_manager')->init();
-  Drupal::translation()->setDefaultLangcode(language(LANGUAGE_TYPE_INTERFACE)->langcode);
+  $default_language = Drupal::service('language_manager')->getLanguage(LANGUAGE_TYPE_INTERFACE);
+  Drupal::translation()->setDefaultLangcode($default_language->langcode);
 }
 
 /**