public function getLanguagePluralFormAction(ParamFetcher $paramFetcher)
{
$lang = $paramFetcher->get('lang');
$lang = preg_replace('/[^a-z]/', '', $lang);
$file = $this->translator->getPluralJsFunctionFile($lang);
//just make sure the file has been created
$response = new Response();
$response->headers->set('Content-Type', 'text/javascript');
$response->setContent($this->webFilesystem->read($file));
return $response;
}