diff --git a/core/modules/language/language.admin.inc b/core/modules/language/language.admin.inc
index a7c6663..0147f12 100644
--- a/core/modules/language/language.admin.inc
+++ b/core/modules/language/language.admin.inc
@@ -187,7 +187,7 @@ function _language_admin_common_controls(&$form, $language = NULL) {
   }
   $form['name'] = array(
     '#type' => 'textfield',
-    '#title' => t('Language name'),
+    '#title' => t('Language name in English'),
     '#maxlength' => 64,
     '#default_value' => @$language->name,
     '#required' => TRUE,
diff --git a/core/modules/language/lib/Drupal/language/Plugin/Core/Entity/Language.php b/core/modules/language/lib/Drupal/language/Plugin/Core/Entity/Language.php
index 4172e96..5991f9e 100644
--- a/core/modules/language/lib/Drupal/language/Plugin/Core/Entity/Language.php
+++ b/core/modules/language/lib/Drupal/language/Plugin/Core/Entity/Language.php
@@ -10,6 +10,8 @@
 use Drupal\Core\Entity\Annotation\EntityType;
 use Drupal\Core\Annotation\Translation;
 use Drupal\Core\Config\Entity\ConfigEntityBase;
+use Drupal\Core\Entity\EntityStorageControllerInterface;
+use Drupal\Core\Language\LanguageManager;
 use Drupal\language\LanguageInterface;
 
 /**
@@ -76,4 +78,15 @@ class Language extends ConfigEntityBase implements LanguageInterface {
    */
   public $locked = FALSE;
 
+  /**
+   * {@inheritdoc}
+   */
+  public function preSave(EntityStorageControllerInterface $storage_controller) {
+    parent::preSave($storage_controller);
+    // Languages are picked from a predefined list which is given in English.
+    // For the uncommon case of custom languages the label should be given in
+    // English.
+    $this->langcode = 'en';
+  }
+
 }
diff --git a/core/modules/language/lib/Drupal/language/Tests/LanguageConfigurationTest.php b/core/modules/language/lib/Drupal/language/Tests/LanguageConfigurationTest.php
index 4bce384..f970bdd 100644
--- a/core/modules/language/lib/Drupal/language/Tests/LanguageConfigurationTest.php
+++ b/core/modules/language/lib/Drupal/language/Tests/LanguageConfigurationTest.php
@@ -51,6 +51,9 @@ function testLanguageConfiguration() {
     $this->drupalPost('admin/config/regional/language/add', $edit, 'Add language');
     $this->assertText('French');
     $this->assertEqual($this->getUrl(), url('admin/config/regional/language', array('absolute' => TRUE)), 'Correct page redirection.');
+    // Langcode for Languages is always 'en'.
+    $language = $this->container->get('config.factory')->get('language.entity.fr')->get();
+    $this->assertEqual($language['langcode'], 'en');
 
     // Check if the Default English language has no path prefix.
     $this->drupalGet('admin/config/regional/language/detection/url');
@@ -100,6 +103,16 @@ function testLanguageConfiguration() {
     );
     $this->drupalPost(NULL, $edit, t('Save configuration'));
     $this->assertText(t('The prefix may not contain a slash.'), 'English prefix cannot be changed to contain a slash.');
+
+    // Remove English language and add a new Language to check if langcode of
+    // Language entity is 'en'.
+    $this->assert(language_delete('en'), 'Deleted English language.');
+    $edit = array(
+      'predefined_langcode' => 'de',
+    );
+    $this->drupalPost('admin/config/regional/language/add', $edit, 'Add language');
+    $language = $this->container->get('config.factory')->get('language.entity.de')->get();
+    $this->assertEqual($language['langcode'], 'en');
   }
 
   /**
diff --git a/core/modules/language/lib/Drupal/language/Tests/LanguageCustomLanguageConfigurationTest.php b/core/modules/language/lib/Drupal/language/Tests/LanguageCustomLanguageConfigurationTest.php
index f5875af..ff8086b 100644
--- a/core/modules/language/lib/Drupal/language/Tests/LanguageCustomLanguageConfigurationTest.php
+++ b/core/modules/language/lib/Drupal/language/Tests/LanguageCustomLanguageConfigurationTest.php
@@ -2,7 +2,7 @@
 
 /**
  * @file
- * Definition of Drupal\language\Tests\LanguageCustomConfigurationTest.
+ * Contains \Drupal\language\Tests\LanguageCustomConfigurationTest.
  */
 
 namespace Drupal\language\Tests;
@@ -47,7 +47,7 @@ public function testLanguageConfiguration() {
     $this->drupalPost('admin/config/regional/language/add', $edit, t('Add custom language'));
     // Test validation on missing values.
     $this->assertText(t('!name field is required.', array('!name' => t('Language code'))));
-    $this->assertText(t('!name field is required.', array('!name' => t('Language name'))));
+    $this->assertText(t('!name field is required.', array('!name' => t('Language name in English'))));
     $empty_language = new Language();
     $this->assertFieldChecked('edit-direction-' . $empty_language->direction, 'Consistent usage of language direction.');
     $this->assertEqual($this->getUrl(), url('admin/config/regional/language/add', array('absolute' => TRUE)), 'Correct page redirection.');
@@ -61,7 +61,7 @@ public function testLanguageConfiguration() {
     );
     $this->drupalPost('admin/config/regional/language/add', $edit, t('Add custom language'));
     $this->assertRaw(t('%field may only contain characters a-z, underscores, or hyphens.', array('%field' => t('Language code'))));
-    $this->assertRaw(t('%field cannot contain any markup.', array('%field' => t('Language name'))));
+    $this->assertRaw(t('%field cannot contain any markup.', array('%field' => t('Language name in English'))));
     $this->assertEqual($this->getUrl(), url('admin/config/regional/language/add', array('absolute' => TRUE)), 'Correct page redirection.');
 
     // Test validation of existing language values.