diff --git a/core/modules/content_translation/lib/Drupal/content_translation/Tests/ContentTranslationSettingsTest.php b/core/modules/content_translation/lib/Drupal/content_translation/Tests/ContentTranslationSettingsTest.php
index 919603e..45faf8d 100644
--- a/core/modules/content_translation/lib/Drupal/content_translation/Tests/ContentTranslationSettingsTest.php
+++ b/core/modules/content_translation/lib/Drupal/content_translation/Tests/ContentTranslationSettingsTest.php
@@ -131,7 +131,7 @@ function testSettingsUI() {
    *   TRUE if the assertion succeeded, FALSE otherwise.
    */
   protected function assertSettings($entity_type, $bundle, $enabled, $edit) {
-    $this->drupalPost('admin/config/regional/content-language', $edit, t('Save'));
+    $this->drupalPost('admin/config/regional/content-language', $edit, t('Save configuration'));
     $args = array('@entity_type' => $entity_type, '@bundle' => $bundle, '@enabled' => $enabled ? 'enabled' : 'disabled');
     $message = format_string('Translation for entity @entity_type (@bundle) is @enabled.', $args);
     field_info_cache_clear();
diff --git a/core/modules/language/language.admin.inc b/core/modules/language/language.admin.inc
index 041398e..0108ef7 100644
--- a/core/modules/language/language.admin.inc
+++ b/core/modules/language/language.admin.inc
@@ -744,95 +744,6 @@ function language_content_settings_page() {
 }
 
 /**
- * Form constructor for the content language settings form.
- *
- * @param array $supported
- *   Entity types with language support.
- *
- * @see language_content_settings_form_submit()
- *
- * @ingroup forms
- */
-function language_content_settings_form(array $form, array $form_state, array $supported) {
-  $entity_info = entity_get_info();
-  $labels = array();
-  $default = array();
-
-  foreach ($supported as $entity_type) {
-    $labels[$entity_type] = isset($entity_info[$entity_type]['label']) ? $entity_info[$entity_type]['label'] : $entity_type;
-    $default[$entity_type] = FALSE;
-
-    // Check whether we have any custom setting.
-    foreach (entity_get_bundles($entity_type) as $bundle => $bundle_info) {
-      $conf = language_get_default_configuration($entity_type, $bundle);
-      if (!empty($conf['language_show']) || $conf['langcode'] != 'site_default') {
-        $default[$entity_type] = $entity_type;
-      }
-      $language_configuration[$entity_type][$bundle] = $conf;
-    }
-  }
-
-  asort($labels);
-
-  $path = drupal_get_path('module', 'language');
-  $form = array(
-    '#labels' => $labels,
-    '#attached' => array(
-      'css' => array($path . '/css/language.admin.css'),
-    ),
-  );
-
-  $form['entity_types'] = array(
-    '#title' => t('Custom language settings'),
-    '#type' => 'checkboxes',
-    '#options' => $labels,
-    '#default_value' => $default,
-  );
-
-  $form['settings'] = array('#tree' => TRUE);
-
-  foreach ($labels as $entity_type => $label) {
-    $info = $entity_info[$entity_type];
-
-    $form['settings'][$entity_type] = array(
-      '#title' => $label,
-      '#type' => 'container',
-      '#entity_type' => $entity_type,
-      '#theme' => 'language_content_settings_table',
-      '#bundle_label' => isset($info['bundle_label']) ? $info['bundle_label'] : $label,
-      '#states' => array(
-        'visible' => array(
-          ':input[name="entity_types[' . $entity_type . ']"]' => array('checked' => TRUE),
-        ),
-      ),
-    );
-
-    foreach (entity_get_bundles($entity_type) as $bundle => $bundle_info) {
-      $form['settings'][$entity_type][$bundle]['settings'] = array(
-        '#type' => 'item',
-        '#label' => $bundle_info['label'],
-        'language' => array(
-          '#type' => 'language_configuration',
-          '#entity_information' => array(
-            'entity_type' => $entity_type,
-            'bundle' => $bundle,
-          ),
-          '#default_value' => $language_configuration[$entity_type][$bundle],
-        ),
-      );
-    }
-  }
-
-  $form['actions'] = array('#type' => 'actions');
-  $form['actions']['submit'] = array(
-    '#type' => 'submit',
-    '#value' => t('Save'),
-  );
-
-  return $form;
-}
-
-/**
  * Implements hook_preprocess_HOOK() for theme_language_content_settings_table().
  */
 function template_preprocess_language_content_settings_table(&$variables) {
diff --git a/core/modules/language/language.module b/core/modules/language/language.module
index 7e5b87b..993a8b1 100644
--- a/core/modules/language/language.module
+++ b/core/modules/language/language.module
@@ -147,9 +147,7 @@ function language_menu() {
   $items['admin/config/regional/content-language'] = array(
     'title' => 'Content language settings',
     'description' => 'Configure content language support for any multilingual element.',
-    'page callback' => 'language_content_settings_page',
-    'access arguments' => array('administer languages'),
-    'file' => 'language.admin.inc',
+    'route_name' => 'language_content_settings',
   );
 
   return $items;
@@ -195,22 +193,6 @@ function language_theme() {
 }
 
 /**
- * Returns a list of supported entity types.
- *
- * @return array
- *   An array of entity type names.
- */
-function language_entity_supported() {
-  $supported = array();
-  foreach (entity_get_info() as $entity_type => $info) {
-    if (!empty($info['translatable'])) {
-      $supported[$entity_type] = $entity_type;
-    }
-  }
-  return $supported;
-}
-
-/**
  * Implements hook_element_info_alter().
  */
 function language_element_info_alter(&$type) {
@@ -607,6 +589,17 @@ function language_library_info() {
     ),
   );
 
+  $libraries['drupal.language.admin'] = array(
+    'title' => 'Language configuration css.',
+    'version' => VERSION,
+    'css' => array(
+      drupal_get_path('module', 'language') . '/css/language.admin.css' => array(
+        'type' => 'file',
+        'media' => 'all',
+      ),
+    ),
+  );
+
   return $libraries;
 }
 
diff --git a/core/modules/language/language.routing.yml b/core/modules/language/language.routing.yml
index e75e1ce..8c90644 100644
--- a/core/modules/language/language.routing.yml
+++ b/core/modules/language/language.routing.yml
@@ -25,3 +25,10 @@ language_admin_overview:
     _entity_list: 'language_entity'
   requirements:
     _permission: 'administer languages'
+
+language_content_settings:
+  pattern: '/admin/config/regional/content-language'
+  defaults:
+    _form: 'Drupal\language\Form\ContentLanguageSettingsForm'
+  requirements:
+    _permission: 'administer languages'