code: public function getFallbackLanguage($mixID)
      {
          if ($this->getMetaModel()->isTranslated()) {
              $langCode = $this->getMetaModel()->getFallbackLanguage();
  
              list($langCode, $country) = explode('_', $langCode, 2);
              return new DefaultLanguageInformation($langCode, $country ?: null);
          }
  
          return null;
      }
docs: {@inheritdoc}
  
  @SuppressWarnings(PHPMD.UnusedFormalParameter)