if ( is_array( $this->descriptor ) && isset( $this->descriptor['lang'] ) ) {
foreach ( array_keys( $this->descriptor['lang'] ) as $langList ) {
if ( strpos( $langList, ',' ) !== false ) {
if ( is_array( $this->descriptor ) && isset( $this->descriptor['lang'] ) ) {
foreach ( array_keys( $this->descriptor['lang'] ) as $langList ) {
if ( strpos( $langList, ',' ) !== false ) {