language_hierarchy.info.yml

@@ -2,6 +2,6 @@ name: Language Hierarchy
 type: module
 description: 'Allows users to configure inheritance between languages.'
 package: Multilingual
-core_version_requirement: ^8 || ^9 || ^10
+core_version_requirement: ^8 || ^9 || ^10 || ^11
 dependencies:
   - drupal:language

language_hierarchy.module

@@ -18,6 +18,23 @@ use Drupal\language\ConfigurableLanguageInterface;
 use Drupal\language\Entity\ConfigurableLanguage;
 use Drupal\views\ViewExecutable;
 
+/**
+ * Implements hook_module_implements_alter().
+ */
+function language_hierarchy_module_implements_alter(&$implementations, $hook) {
+  switch ($hook) {
+    case 'language_fallback_candidates_path_alias_alter':
+      // Ensure language_hierarchy_language_fallback_candidates_alter() would
+      // run after path_alias_language_fallback_candidates_path_alias_alter().
+      if (isset($implementations['language_hierarchy']) && isset($implementations['path_alias'])) {
+        $group = $implementations['language_hierarchy'];
+        unset($implementations['language_hierarchy']);
+        $implementations['language_hierarchy'] = $group;
+      }
+      break;
+  }
+}
+
 /**
  * Implements hook_language_fallback_candidates_alter().
  */

src/Config/LanguageHierarchyConfigFactoryOverride.php

@@ -91,7 +91,7 @@ class LanguageHierarchyConfigFactoryOverride extends LanguageConfigFactoryOverri
   /**
    * {@inheritdoc}
    */
-  public function setLanguage(LanguageInterface $language = NULL) {
+  public function setLanguage(?LanguageInterface $language = NULL) {
     $this->fallbackChain = $this->getFallbackChainFromConfigEntities($language->getId());
     return parent::setLanguage($language);
   }

tests/src/Kernel/Core/LocaleConfigSubscriberTest.php

@@ -26,7 +26,7 @@ class LocaleConfigSubscriberTest extends CoreLocaleConfigSubscriberTest {
   /**
    * {@inheritdoc}
    */
-  protected function setUpLanguages() {
+  protected function setUpLanguages(): void {
     $this->installSchema('language_hierarchy', ['language_hierarchy_priority']);
     parent::setUpLanguages();
   }

tests/src/Kernel/StringDatabaseStorageDecoratorTest.php

@@ -12,6 +12,11 @@ use Drupal\language\Entity\ConfigurableLanguage;
  */
 class StringDatabaseStorageDecoratorTest extends KernelTestBase {
 
+  /**
+   * @var \Drupal\locale\StringStorageInterface
+   */
+  protected $storage;
+
   /**
    * {@inheritdoc}
    */