diff -u b/core/modules/system/lib/Drupal/system/Controller/ThemeListingController.php b/core/modules/system/lib/Drupal/system/Controller/ThemeListingController.php
--- b/core/modules/system/lib/Drupal/system/Controller/ThemeListingController.php
+++ b/core/modules/system/lib/Drupal/system/Controller/ThemeListingController.php
@@ -10,6 +10,7 @@
 use Drupal\Core\Controller\ControllerInterface;
 use Drupal\Core\Config\Config;
 use Drupal\Core\Extension\ModuleHandler;
+use Drupal\Core\StringTranslation\TranslationManager;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\HttpFoundation\Request;
 
@@ -26,18 +27,33 @@
   protected $config;
 
   /**
-   * The module handler object.
+   * The module handler service.
    *
    * @var \Drupal\Core\Extension\ModuleHandler
    */
   protected $moduleHandler;
 
   /**
+   * The translation manager service.
+   *
+   * @var \Drupal\Core\StringTranslation\TranslationManager
+   */
+  protected $translation;
+
+  /**
    * Constructs a ThemeListingController object.
+   *
+   * @param \Drupal\Core\Config\Config $config
+   *  The system.theme config object.
+   * @param \Drupal\Core\Extension\ModuleHandler $module_handler
+   *  The module handler service.
+   * @param \Drupal\Core\StringTranslation\TranslationManager $translation
+   *  The translation manager service.
    */
-  public function __construct(Config $config, ModuleHandler $module_handler) {
+  public function __construct(Config $config, ModuleHandler $module_handler, TranslationManager $translation) {
     $this->config = $config;
     $this->moduleHandler = $module_handler;
+    $this->translation = $translation;
   }
 
   /**
@@ -46,10 +62,17 @@
   public static function create(ContainerInterface $container) {
     return new static(
       $container->get('config.factory')->get('system.theme'),
-      $container->get('module_handler')
+      $container->get('module_handler'),
+      $container->get('string_translation')
     );
   }
 
+  /**
+   * Returns a theme listing.
+   *
+   * @return string
+   *  A HTML string of the theme listing page.
+   */
   public function listingPage() {
     // Get current list of themes.
     $themes = system_rebuild_theme_data();
@@ -80,8 +103,8 @@
         if (isset($themes[$theme_key]) && file_exists($themes[$theme_key]->info['screenshot'])) {
           $theme->screenshot = array(
             'uri' => $themes[$theme_key]->info['screenshot'],
-            'alt' => t('Screenshot for !theme theme', array('!theme' => $theme->info['name'])),
-            'title' => t('Screenshot for !theme theme', array('!theme' => $theme->info['name'])),
+            'alt' => $this->translation->translate('Screenshot for !theme theme', array('!theme' => $theme->info['name'])),
+            'title' => $this->translation->translate('Screenshot for !theme theme', array('!theme' => $theme->info['name'])),
             'attributes' => array('class' => array('screenshot')),
           );
           break;
@@ -106,42 +129,42 @@
         $query['theme'] = $theme->name;
         if (drupal_theme_access($theme)) {
           $theme->operations[] = array(
-            'title' => t('Settings'),
+            'title' => $this->translation->translate('Settings'),
             'href' => 'admin/appearance/settings/' . $theme->name,
-            'attributes' => array('title' => t('Settings for !theme theme', array('!theme' => $theme->info['name']))),
+            'attributes' => array('title' => $this->translation->translate('Settings for !theme theme', array('!theme' => $theme->info['name']))),
           );
         }
         if (!empty($theme->status)) {
           if (!$theme->is_default) {
             if ($theme->name != $admin_theme) {
               $theme->operations[] = array(
-                'title' => t('Disable'),
+                'title' => $this->translation->translate('Disable'),
                 'href' => 'admin/appearance/disable',
                 'query' => $query,
-                'attributes' => array('title' => t('Disable !theme theme', array('!theme' => $theme->info['name']))),
+                'attributes' => array('title' => $this->translation->translate('Disable !theme theme', array('!theme' => $theme->info['name']))),
               );
             }
             $theme->operations[] = array(
-              'title' => t('Set default'),
+              'title' => $this->translation->translate('Set default'),
               'href' => 'admin/appearance/default',
               'query' => $query,
-              'attributes' => array('title' => t('Set !theme as default theme', array('!theme' => $theme->info['name']))),
+              'attributes' => array('title' => $this->translation->translate('Set !theme as default theme', array('!theme' => $theme->info['name']))),
             );
           }
           $admin_theme_options[$theme->name] = $theme->info['name'];
         }
         else {
           $theme->operations[] = array(
-            'title' => t('Enable'),
+            'title' => $this->translation->translate('Enable'),
             'href' => 'admin/appearance/enable',
             'query' => $query,
-            'attributes' => array('title' => t('Enable !theme theme', array('!theme' => $theme->info['name']))),
+            'attributes' => array('title' => $this->translation->translate('Enable !theme theme', array('!theme' => $theme->info['name']))),
           );
           $theme->operations[] = array(
-            'title' => t('Enable and set default'),
+            'title' => $this->translation->translate('Enable and set default'),
             'href' => 'admin/appearance/default',
             'query' => $query,
-            'attributes' => array('title' => t('Enable !theme as default theme', array('!theme' => $theme->info['name']))),
+            'attributes' => array('title' => $this->translation->translate('Enable !theme as default theme', array('!theme' => $theme->info['name']))),
           );
         }
       }
@@ -151,11 +174,11 @@
       $theme->classes = array();
       if ($theme->is_default) {
         $theme->classes[] = 'theme-default';
-        $theme->notes[] = t('default theme');
+        $theme->notes[] = $this->translation->translate('default theme');
       }
       if ($theme->name == $admin_theme || ($theme->is_default && $admin_theme == '0')) {
         $theme->classes[] = 'theme-admin';
-        $theme->notes[] = t('admin theme');
+        $theme->notes[] = $this->translation->translate('admin theme');
       }
 
       // Sort enabled and disabled themes into their own groups.
diff -u b/core/modules/system/system.module b/core/modules/system/system.module
--- b/core/modules/system/system.module
+++ b/core/modules/system/system.module
@@ -667,6 +667,7 @@
   $items['admin/appearance'] = array(
     'title' => 'Appearance',
     'description' => 'Select and configure your themes.',
+    'route_name' => 'system_theme_listing',
     'position' => 'left',
     'weight' => -6,
   );