public function stage(GatewayType $adapter, $normalized, &$stagedData)
 {
     if (!isset($normalized['language'])) {
         return;
     }
     $language = $normalized['language'];
     $adapterLanguages = $adapter->getAvailableLanguages();
     if (!in_array($language, $adapterLanguages)) {
         $fallbacks = WmfFramework::getLanguageFallbacks($language);
         foreach ($fallbacks as $fallback) {
             if (in_array($fallback, $adapterLanguages)) {
                 $language = $fallback;
                 break;
             }
         }
     }
     if (!in_array($language, $adapterLanguages)) {
         $language = 'en';
     }
     $stagedData['language'] = $language;
 }