diff --git a/core/modules/content_translation/css/content_translation.admin.css b/core/modules/content_translation/css/content_translation.admin.css
index a4435be85e0..72399d66e0f 100644
--- a/core/modules/content_translation/css/content_translation.admin.css
+++ b/core/modules/content_translation/css/content_translation.admin.css
@@ -6,9 +6,6 @@
 #language-content-settings-form table .bundle {
   width: 24%;
 }
-#language-content-settings-form table td.bundle {
-  font-weight: bold;
-}
 #language-content-settings-form table .field {
   padding-left: 3em; /* LTR */
   width: 24%;
diff --git a/core/modules/language/css/language.admin.css b/core/modules/language/css/language.admin.css
index 2af92d701ae..910279ee3cf 100644
--- a/core/modules/language/css/language.admin.css
+++ b/core/modules/language/css/language.admin.css
@@ -6,11 +6,6 @@
 #language-content-settings-form table .bundle {
   width: 25%;
 }
-
-#language-content-settings-form table td.bundle {
-  font-weight: bold;
-}
-
 #language-content-settings-form table .operations {
   width: 75%;
 }
diff --git a/core/modules/language/language.libraries.yml b/core/modules/language/language.libraries.yml
index 78491b3d039..0c4cc8c2973 100644
--- a/core/modules/language/language.libraries.yml
+++ b/core/modules/language/language.libraries.yml
@@ -1,7 +1,10 @@
-language.admin:
+drupal.language.admin:
   version: VERSION
   js:
     language.admin.js: {}
+  css:
+    theme:
+      css/language.admin.css: {}
   dependencies:
     - core/jquery
     - core/drupal
diff --git a/core/modules/language/src/Form/NegotiationConfigureForm.php b/core/modules/language/src/Form/NegotiationConfigureForm.php
index 191e08d37a2..445e336ef3a 100644
--- a/core/modules/language/src/Form/NegotiationConfigureForm.php
+++ b/core/modules/language/src/Form/NegotiationConfigureForm.php
@@ -207,7 +207,7 @@ class NegotiationConfigureForm extends FormBase {
         '#attributes' => array('class' => array('language-customization-checkbox')),
         '#attached' => array(
           'library' => array(
-            'language/language.admin'
+            'language/drupal.language.admin'
           ),
         ),
       );