diff --git a/core/modules/menu_link/lib/Drupal/menu_link/MenuLinkFormController.php b/core/modules/menu_link/lib/Drupal/menu_link/MenuLinkFormController.php
index c86a00e..ab7969f 100644
--- a/core/modules/menu_link/lib/Drupal/menu_link/MenuLinkFormController.php
+++ b/core/modules/menu_link/lib/Drupal/menu_link/MenuLinkFormController.php
@@ -160,15 +160,20 @@ public function form(array $form, array &$form_state) {
     $language_configuration = \Drupal::moduleHandler()->invoke('language', 'get_default_configuration', array('menu_link', $menu_link->bundle()));
 
     if ($menu_link->isNew()) {
-      // Adding a new menu link, use the default from language settings config.
-      // If no default for menu links, default to the language of the menu.
+      // Adding a new menu link, use the default from language settings config,
+      // if it is available.
       if (!is_null($language_configuration['langcode'])) {
         $default_langcode = $language_configuration['langcode'];
       }
-      else {
+      elseif (\Drupal::moduleHandler()->moduleExists('menu')) {
+        // If no default for menu links, default to the language of the menu.
         $menu = menu_load($menu_link->menu_name);
         $default_langcode = $menu->langcode;
       }
+      else {
+        // We do not know the language of the menu.
+        $default_langcode = Language::LANGCODE_NOT_SPECIFIED;
+      }
     }
     else {
       // Editing an already existing menu link, so use it's saved language.