diff --git a/core/lib/Drupal/Core/Updater/Theme.php b/core/lib/Drupal/Core/Updater/Theme.php
index 48f68c7..c03cc0c 100644
--- a/core/lib/Drupal/Core/Updater/Theme.php
+++ b/core/lib/Drupal/Core/Updater/Theme.php
@@ -101,7 +101,7 @@ public function postInstallTasks() {
     return [
       $default_options + [
         '#url' => Url::fromRoute('system.themes_page'),
-        '#title' => t('Install newly added themes'),
+        '#title' => t('Enable newly added themes'),
       ],
       $default_options + [
         '#url' => Url::fromRoute('system.admin'),
diff --git a/core/modules/system/src/Controller/SystemController.php b/core/modules/system/src/Controller/SystemController.php
index 41ed824..d557c82 100644
--- a/core/modules/system/src/Controller/SystemController.php
+++ b/core/modules/system/src/Controller/SystemController.php
@@ -270,10 +270,10 @@ public function themesPage() {
             }
             if ($theme_uninstallable) {
               $theme->operations[] = array(
-                'title' => $this->t('Uninstall'),
+                'title' => $this->t('Disable'),
                 'url' => Url::fromRoute('system.theme_uninstall'),
                 'query' => $query,
-                'attributes' => array('title' => $this->t('Uninstall @theme theme', array('@theme' => $theme->info['name']))),
+                'attributes' => array('title' => $this->t('Disable @theme theme', array('@theme' => $theme->info['name']))),
               );
             }
             $theme->operations[] = array(
@@ -287,16 +287,16 @@ public function themesPage() {
         }
         else {
           $theme->operations[] = array(
-            'title' => $this->t('Install'),
+            'title' => $this->t('Enable'),
             'url' => Url::fromRoute('system.theme_install'),
             'query' => $query,
-            'attributes' => array('title' => $this->t('Install @theme theme', array('@theme' => $theme->info['name']))),
+            'attributes' => array('title' => $this->t('Enable @theme theme', array('@theme' => $theme->info['name']))),
           );
           $theme->operations[] = array(
-            'title' => $this->t('Install and set as default'),
+            'title' => $this->t('Enable and set as default'),
             'url' => Url::fromRoute('system.theme_set_default'),
             'query' => $query,
-            'attributes' => array('title' => $this->t('Install @theme as default theme', array('@theme' => $theme->info['name']))),
+            'attributes' => array('title' => $this->t('Enable @theme as default theme', array('@theme' => $theme->info['name']))),
           );
         }
       }