diff --git a/core/modules/language/language.admin.inc b/core/modules/language/language.admin.inc
index 3baf045..ce79a25 100644
--- a/core/modules/language/language.admin.inc
+++ b/core/modules/language/language.admin.inc
@@ -7,6 +7,7 @@
 
 use Drupal\Component\Utility\String;
 use Drupal\Core\Render\Element;
+use Drupal\Core\Template\Attribute;
 
 /**
  * Prepares variables for language negotiation configuration form.
@@ -88,7 +89,7 @@ function template_preprocess_language_negotiation_configure_form(&$variables) {
     // Prevent the type from rendering with the remaining form child elements.
     unset($form[$type]);
   }
-
+  $variables['wrapper_attributes'] = new Attribute();
   $variables['children'] = $form;
 }
 
diff --git a/core/modules/language/templates/language-negotiation-configure-form.html.twig b/core/modules/language/templates/language-negotiation-configure-form.html.twig
index 67ddda4..a57a8f0 100644
--- a/core/modules/language/templates/language-negotiation-configure-form.html.twig
+++ b/core/modules/language/templates/language-negotiation-configure-form.html.twig
@@ -20,7 +20,14 @@
 */
 #}
 {% for language_type in language_types %}
-  <div class="form-item table-language-group table-{{ language_type.type }}-wrapper">
+  {%
+    set wrapper_classes = [
+      'form-item',
+      'table-language-group',
+      'table-' ~ language_type.type ~ '-wrapper',
+    ]
+  %}
+  <div{{ wrapper_attributes.addClass(wrapper_classes) }}>
     <h2>{{ language_type.title }}</h2>
     <div class="description">{{ language_type.description }}</div>
     {{ language_type.configurable }}