/**
* Load language files
*
* @param string $extension The name of the extension
* @param string $source Path to the extension
* @param string $base Base path for the extension language
*
* @return void
*
* @since 3.4
*/
protected function doLoadLanguage($extension, $source, $base = JPATH_ADMINISTRATOR)
{
$lang = Factory::getLanguage();
$lang->load($extension . '.sys', $source) || $lang->load($extension . '.sys', $base);
}