code: public function permalinksByLanguage($language = null)
      {
          $result = array();
  
          if (null === $language) {
              $language = $this->currentLanguage;
          }
  
          foreach ($this->pages as $page) {
              foreach ($page["seo"] as $pageAttribute) {
                  if ($pageAttribute["language"] != $language) {
                      continue;
                  }
  
                  $result[] = $pageAttribute["permalink"];
              }
          }
  
          return $result;
      }
docs: Return the permalinks for the given language. By default this method returns the permalinks for the handled
  language
  
  @param null|string $language
  
  @return array