diff -u b/core/includes/bootstrap.inc b/core/includes/bootstrap.inc
--- b/core/includes/bootstrap.inc
+++ b/core/includes/bootstrap.inc
@@ -2773,8 +2773,9 @@
     // Fill in master language list based on current configuration.
     $default = language_default();
     if (language_multilingual() || module_exists('language')) {
-      // Use language module configuration if available.
-      $language_entities = entity_load_multiple('language');
+      // Use language module configuration if available. Always reset the entity
+      // cache as the language objects are statically cached.
+      $language_entities = entity_load_multiple('language', NULL, TRUE);
       uasort($language_entities, 'language_entity_sort');
       // Initialize default property so callers have an easy reference and can
       // save the same object without data loss.
only in patch2:
unchanged:
--- a/core/modules/entity/entity.module
+++ b/core/modules/entity/entity.module
@@ -10,6 +10,7 @@ use Drupal\entity\EntityFieldQuery;
 use Drupal\entity\EntityMalformedException;
 use Drupal\entity\EntityStorageException;
 use Drupal\entity\EntityInterface;
+use \stdClass;
 
 /**
  * Implements hook_help().
@@ -49,8 +50,15 @@ function entity_modules_disabled() {
  * @see hook_entity_info_alter()
  */
 function entity_get_info($entity_type = NULL) {
-  $language_interface = language(LANGUAGE_TYPE_INTERFACE);
-
+  // We need a special exception for the language config entity as this call to
+  // language will lead to the turtles gettings language negotiaiton wrong.
+  if ($entity_type != 'language') {
+    $language_interface = language(LANGUAGE_TYPE_INTERFACE);
+  }
+  else {
+    $language_interface = new stdClass;
+    $language_interface->langcode = LANGUAGE_NOT_SPECIFIED;
+  }
   // Use the advanced drupal_static() pattern, since this is called very often.
   static $drupal_static_fast;
   if (!isset($drupal_static_fast)) {