diff --git a/core/lib/Drupal/Core/Language/LanguageManager.php b/core/lib/Drupal/Core/Language/LanguageManager.php
index ff2aa56..581e6b4 100644
--- a/core/lib/Drupal/Core/Language/LanguageManager.php
+++ b/core/lib/Drupal/Core/Language/LanguageManager.php
@@ -130,7 +130,7 @@ public function getLanguages($flags = LanguageInterface::STATE_CONFIGURABLE) {
     // Filter the full list of languages based on the value of the $all flag. By
     // default we remove the locked languages, but the caller may request for
     // those languages to be added as well.
-    return $this->languageFilter($languages, $flags);
+    return $this->filterLanguages($languages, $flags);
   }
 
   /**
@@ -371,7 +371,7 @@ public function getConfigOverrideLanguage() {
    * @return \Drupal\Core\Language\LanguageInterface[]
    *   An associative array of languages, keyed by the language code.
    */
-  protected function languageFilter(array $languages, $flags = LanguageInterface::STATE_CONFIGURABLE) {
+  protected function filterLanguages(array $languages, $flags = LanguageInterface::STATE_CONFIGURABLE) {
     $filtered_languages = array();
     // Add the site's default language if flagged as allowed value.
     if ($flags & LanguageInterface::STATE_SITE_DEFAULT) {
diff --git a/core/modules/language/src/ConfigurableLanguageManager.php b/core/modules/language/src/ConfigurableLanguageManager.php
index 354616f..7dff690 100644
--- a/core/modules/language/src/ConfigurableLanguageManager.php
+++ b/core/modules/language/src/ConfigurableLanguageManager.php
@@ -283,7 +283,7 @@ public function getLanguages($flags = LanguageInterface::STATE_CONFIGURABLE) {
     // Sort the language list by weight then title.
     Language::sort($languages);
 
-    return $this->languageFilter($languages, $flags);
+    return $this->filterLanguages($languages, $flags);
   }
 
   /**
diff --git a/core/modules/language/tests/language_test/language_test.module b/core/modules/language/tests/language_test/language_test.module
index 0a89198..17cad00 100644
--- a/core/modules/language/tests/language_test/language_test.module
+++ b/core/modules/language/tests/language_test/language_test.module
@@ -96,5 +96,5 @@ function language_test_language_fallback_candidates_test_alter(array &$candidate
  * Implements hook_module_preinstall().
  */
 function language_test_module_preinstall() {
-  \Drupal::state()->set('language_test.language_count_preinstall', count(\Drupal::languageManager()->getLanguages()));
+  \Drupal::state()->set('language_test.language_count_preinstall', count(\Drupal::configFactory()->listAll('language.entity.')));
 }