Add content translations for site_sections taxonomy terms

Taxonomy term names are content, not interface strings, so .po files
don't translate them. This adds programmatic content translations via
the ContentLanguageSettings API and addTranslation/setName on each term.

- Add _structural_pages_term_translations() with pt-br name map
- Add _structural_pages_add_term_translations() to create/update translations
- Add _structural_pages_ensure_content_translation() using ContentLanguageSettings API
- Add config/optional for new installs with content_translation enabled
- Remove term name entries from .po file (ineffective for content)
- Add update hook 10004 to fix existing installations

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

structural_pages.install

@@ -73,6 +73,8 @@ function _structural_pages_create_default_terms(): void {
     'IT Services' => [],
   ];
 
+  $created_terms = [];
+
   $weight = 0;
   foreach ($terms_structure as $parent_name => $children) {
     // Create parent term.
@@ -82,6 +84,7 @@ function _structural_pages_create_default_terms(): void {
       'weight' => $weight++,
     ]);
     $parent_term->save();
+    $created_terms[] = $parent_term;
 
     // Create child terms.
     $child_weight = 0;
@@ -93,8 +96,96 @@ function _structural_pages_create_default_terms(): void {
         'weight' => $child_weight++,
       ]);
       $child_term->save();
+      $created_terms[] = $child_term;
     }
   }
+
+  // Add content translations if available.
+  _structural_pages_add_term_translations($created_terms);
+}
+
+/**
+ * Adds content translations to taxonomy terms.
+ *
+ * @param \Drupal\taxonomy\Entity\Term[] $terms
+ *   The terms to translate.
+ */
+function _structural_pages_add_term_translations(array $terms): void {
+  if (!\Drupal::moduleHandler()->moduleExists('content_translation')) {
+    return;
+  }
+
+  $translations = _structural_pages_term_translations();
+  $language_manager = \Drupal::languageManager();
+
+  foreach ($translations as $langcode => $name_map) {
+    if (!$language_manager->getLanguage($langcode)) {
+      continue;
+    }
+
+    foreach ($terms as $term) {
+      $name = $term->getName();
+      if (!isset($name_map[$name])) {
+        continue;
+      }
+
+      $translated_name = $name_map[$name];
+
+      if ($term->hasTranslation($langcode)) {
+        // Update existing translation if name doesn't match.
+        $translation = $term->getTranslation($langcode);
+        if ($translation->getName() !== $translated_name) {
+          $translation->setName($translated_name);
+          $translation->save();
+        }
+      }
+      else {
+        $term->addTranslation($langcode, ['name' => $translated_name]);
+        $term->save();
+      }
+    }
+  }
+}
+
+/**
+ * Returns term name translations keyed by langcode.
+ *
+ * @return array
+ *   Nested array: langcode => [english_name => translated_name].
+ */
+function _structural_pages_term_translations(): array {
+  return [
+    'pt-br' => [
+      'News' => 'Notícias',
+      'Events' => 'Eventos',
+      'People' => 'Pessoas',
+      'Institutional' => 'Institucional',
+      'About' => 'Sobre',
+      'Communication' => 'Comunicação',
+      'Information and Services' => 'Informações e Serviços',
+      'Team' => 'Equipe',
+      'Management' => 'Gestão',
+      'Inclusion and Belonging' => 'Inclusão e Pertencimento',
+      'Undergraduate' => 'Graduação',
+      'Statistics' => 'Estatística',
+      'Mathematics' => 'Matemática',
+      'Applied Mathematics' => 'Matemática Aplicada',
+      'Mathematics Teaching' => 'Licenciatura em Matemática',
+      'Graduate' => 'Pós-Graduação',
+      'Statistics Program' => 'Programa de Estatística',
+      'Mathematics Program' => 'Programa de Matemática',
+      'Applied Mathematics Program' => 'Programa de Matemática Aplicada',
+      'Research' => 'Pesquisa',
+      'Extension' => 'Extensão',
+      'Administration' => 'Administração',
+      'Departments' => 'Departamentos',
+      'Statistics Department' => 'Departamento de Estatística',
+      'Mathematics Department' => 'Departamento de Matemática',
+      'Applied Mathematics Department' => 'Departamento de Matemática Aplicada',
+      'Library' => 'Biblioteca',
+      'IT Services' => 'Informática',
+    ],
+  ];
 }
 
 /**
@@ -186,6 +277,49 @@ function structural_pages_update_10001(): void {
   }
 }
 
+/**
+ * Add content translations to site_sections taxonomy terms (no-op, see 10003).
+ */
+function structural_pages_update_10002(): void {
+}
+
+/**
+ * Add content translations to site_sections taxonomy terms (no-op, see 10004).
+ */
+function structural_pages_update_10003(): void {
+}
+
+/**
+ * Fix content translation config and update site_sections term translations.
+ */
+function structural_pages_update_10004(): void {
+  // Ensure content translation is properly configured for the vocabulary.
+  _structural_pages_ensure_content_translation();
+
+  $terms = \Drupal::entityTypeManager()
+    ->getStorage('taxonomy_term')
+    ->loadByProperties(['vid' => 'site_sections']);
+
+  if ($terms) {
+    _structural_pages_add_term_translations($terms);
+  }
+}
+
+/**
+ * Ensures content translation settings exist for site_sections vocabulary.
+ */
+function _structural_pages_ensure_content_translation(): void {
+  if (!\Drupal::moduleHandler()->moduleExists('content_translation')) {
+    return;
+  }
+
+  $config = \Drupal\language\Entity\ContentLanguageSettings::loadByEntityTypeBundle('taxonomy_term', 'site_sections');
+  $config->setDefaultLangcode('site_default');
+  $config->setLanguageAlterable(TRUE);
+  $config->setThirdPartySetting('content_translation', 'enabled', TRUE);
+  $config->save();
+}
+
 /**
  * Implements hook_requirements().
  */