diff --git a/core/modules/content_translation/css/content_translation.admin.css b/core/modules/content_translation/css/content_translation.admin.css
index 72399d6..0c8454b 100644
--- a/core/modules/content_translation/css/content_translation.admin.css
+++ b/core/modules/content_translation/css/content_translation.admin.css
@@ -3,31 +3,31 @@
  * Styles for the content language administration page.
  */
 
-#language-content-settings-form table .bundle {
+.language-content-settings-form table .bundle {
   width: 24%;
 }
-#language-content-settings-form table .field {
+.language-content-settings-form table .field {
   padding-left: 3em; /* LTR */
   width: 24%;
 }
-[dir="rtl"] #language-content-settings-form table .field {
+[dir="rtl"] .language-content-settings-form table .field {
   padding-right: 3em;
   padding-left: 1em;
 }
-#language-content-settings-form table .column {
+.language-content-settings-form table .column {
   padding-left: 5em; /* LTR */
 }
-[dir="rtl"] #language-content-settings-form table .column {
+[dir="rtl"] .language-content-settings-form table .column {
   padding-right: 5em;
   padding-left: 1em;
 }
-#language-content-settings-form table .field label,
-#language-content-settings-form table .column label {
+.language-content-settings-form table .field label,
+.language-content-settings-form table .column label {
   font-weight: normal;
 }
-#language-content-settings-form table .translatable {
+.language-content-settings-form table .translatable {
   width: 1%;
 }
-#language-content-settings-form table .operations {
+.language-content-settings-form table .operations {
   width: 75%;
 }
diff --git a/core/modules/language/src/Form/ContentLanguageSettingsForm.php b/core/modules/language/src/Form/ContentLanguageSettingsForm.php
index fc53554..ff696e6 100644
--- a/core/modules/language/src/Form/ContentLanguageSettingsForm.php
+++ b/core/modules/language/src/Form/ContentLanguageSettingsForm.php
@@ -95,6 +95,9 @@ public function buildForm(array $form, FormStateInterface $form_state) {
       '#type' => 'checkboxes',
       '#options' => $labels,
       '#default_value' => $default,
+      '#attributes' => array(
+        'class' => 'language-content-settings-form',
+      ),
     );
 
     $form['settings'] = array('#tree' => TRUE);