$loaded[$extensionName] = array();
}
+ if ( !isset($wgExtensionMessagesFiles[$extensionName]) ) {
+ throw new MWException( "Messages file for extensions $extensionName is not defined" );
+ }
+
if( !$langcode && !array_key_exists( '*', $loaded[$extensionName] ) ) {
# Just do en, content language and user language.
$wgMessageCache->loadMessagesFile( $wgExtensionMessagesFiles[$extensionName], false );