diff --git a/core/modules/node/src/Tests/Views/NodeLanguageTest.php b/core/modules/node/src/Tests/Views/NodeLanguageTest.php
index b562b14..0947a1e 100644
--- a/core/modules/node/src/Tests/Views/NodeLanguageTest.php
+++ b/core/modules/node/src/Tests/Views/NodeLanguageTest.php
@@ -7,9 +7,9 @@
 
 namespace Drupal\node\Tests\Views;
 
-use Drupal\Core\Language\LanguageInterface;
 use Drupal\field\Entity\FieldStorageConfig;
 use Drupal\language\Entity\ConfigurableLanguage;
+use Drupal\views\Plugin\views\PluginBase;
 
 /**
  * Tests node language fields, filters, and sorting.
@@ -181,7 +181,7 @@ public function testLanguages() {
     // filter is set to the site default language instead. This should just
     // show the English nodes, no matter what the content language is.
     $config = \Drupal::config('views.view.frontpage');
-    $config->set('display.default.display_options.filters.langcode.value', array('***LANGUAGE_' . LanguageInterface::LANGCODE_SITE_DEFAULT . '***' => '***LANGUAGE_' . LanguageInterface::LANGCODE_SITE_DEFAULT . '***'));
+    $config->set('display.default.display_options.filters.langcode.value', array(PluginBase::VIEWS_QUERY_LANGUAGE_SITE_DEFAULT => PluginBase::VIEWS_QUERY_LANGUAGE_SITE_DEFAULT));
     $config->save();
     foreach ($this->node_titles as $langcode => $titles) {
       $this->drupalGet(($langcode == 'en' ? '' : "$langcode/") . 'node');
diff --git a/core/modules/views/src/Plugin/views/PluginBase.php b/core/modules/views/src/Plugin/views/PluginBase.php
index 5a088d1..7363d28 100644
--- a/core/modules/views/src/Plugin/views/PluginBase.php
+++ b/core/modules/views/src/Plugin/views/PluginBase.php
@@ -415,7 +415,7 @@ protected function listLanguages($flags = LanguageInterface::STATE_ALL) {
     $languages = $manager->getLanguages($flags);
     foreach ($languages as $id => $language) {
       if ($id == LanguageInterface::LANGCODE_SITE_DEFAULT) {
-        $id = '***LANGUAGE_' . $id . '***';
+        $id = PluginBase::VIEWS_QUERY_LANGUAGE_SITE_DEFAULT;
       }
       $list[$id] = t($language->name);
     }
@@ -455,7 +455,7 @@ public static function queryLanguageSubstitutions() {
 
     // Handle default language.
     $default = $manager->getDefaultLanguage()->id;
-    $changes['***LANGUAGE_' . LanguageInterface::LANGCODE_SITE_DEFAULT . '***'] = $default;
+    $changes[PluginBase::VIEWS_QUERY_LANGUAGE_SITE_DEFAULT] = $default;
 
     // Handle negotiated languages.
     $types = $manager->getDefinedLanguageTypesInfo();
diff --git a/core/modules/views/views.api.php b/core/modules/views/views.api.php
index 65283f1..3f73e63 100644
--- a/core/modules/views/views.api.php
+++ b/core/modules/views/views.api.php
@@ -6,6 +6,7 @@
  */
 
 use Drupal\Core\Language\LanguageInterface;
+use Drupal\views\Plugin\views\PluginBase;
 
 /**
  * @defgroup views_overview Views overview
@@ -579,7 +580,7 @@ function hook_views_query_substitutions(ViewExecutable $view) {
     '***CURRENT_VERSION***' => \Drupal::VERSION,
     '***CURRENT_TIME***' => REQUEST_TIME,
     '***LANGUAGE_language_content***' => \Drupal::languageManager()->getCurrentLanguage(LanguageInterface::TYPE_CONTENT)->id,
-    '***LANGUAGE_' . LanguageInterface::LANGCODE_SITE_DEFAULT . '***' => \Drupal::languageManager()->getDefaultLanguage()->id,
+    PluginBase::VIEWS_QUERY_LANGUAGE_SITE_DEFAULT => \Drupal::languageManager()->getDefaultLanguage()->id,
   );
 }