public function filterLanguage($language = 'en')
    {
        return $this->filter(
            function ($key, $value) use ($language) {
                if ($value instanceof LanguageFilter && $value->getIso6391() == $language) {
                    return true;
                }
            }
        );
    }
public function filterLanguage($language = 'en')
    {
        return $this->filter(
            function ($key, $value) use ($language) {
                if ($value instanceof LanguageFilter && $value->getIso6391() == $language) {
                    return true;
                }
            }
        );
    }
public function filterLanguage ( $ language = 'en' ) { return $ this -> filter ( function ( $ key , $ value ) use ( $ language ) { if ( $ value instanceof LanguageFilter && $ value -> getIso6391 ( ) == $ language ) { return true ; } } ) ; }
Filter by language ISO 639-1 code.

@param  string            $language
@return GenericCollection
Filter by language ISO 639 - 1 code .