english/libraries/joomla/plugin/plugin.php
/**
	 * Loads the plugin language file
	 *
	 * @param   string  $extension  The extension for which a language file should be loaded
	 * @param   string  $basePath   The basepath to use
	 *
	 * @return  boolean  True, if the file has successfully loaded.
	 *
	 * @since   11.1
	 */
Loads the plugin language file
@param   string  $extension  The extension for which a language file should be loaded
@param   string  $basePath   The basepath to use

@return  boolean  True, if the file has successfully loaded.


Loads the plugin language file @param string $extension The extension for which a language file should be loaded @param string $basePath The basepath to use @return boolean True if the file has successfully loaded .
public function loadLanguage($extension = '', $basePath = JPATH_ADMINISTRATOR)
	{
		if (empty($extension)) {
			$extension = 'plg_'.$this->_type.'_'.$this->_name;
		}
		$lang = JFactory::getLanguage();
		return
			$lang->load(strtolower($extension), $basePath, null, false, false)
		||	$lang->load(strtolower($extension), JPATH_PLUGINS . '/' . $this->_type . '/' . $this->_name, null, false, false)
		||	$lang->load(strtolower($extension), $basePath, $lang->getDefault(), false, false)
		||	$lang->load(strtolower($extension), JPATH_PLUGINS . '/' . $this->_type . '/' . $this->_name, $lang->getDefault(), false, false);
	}
public function loadLanguage ( $ extension = '' , $ basePath = JPATH_ADMINISTRATOR ) { if ( empty ( $ extension ) ) { $ extension = 'plg_' . $ this -> _type . '_' . $ this -> _name ; } $ lang = JFactory :: getLanguage ( ) ; return $ lang -> load ( strtolower ( $ extension ) , $ basePath , null , false , false ) || $ lang -> load ( strtolower ( $ extension ) , JPATH_PLUGINS . '/' . $ this -> _type . '/' . $ this -> _name , null , false , false ) || $ lang -> load ( strtolower ( $ extension ) , $ basePath , $ lang -> getDefault ( ) , false , false ) || $ lang -> load ( strtolower ( $ extension ) , JPATH_PLUGINS . '/' . $ this -> _type . '/' . $ this -> _name , $ lang -> getDefault ( ) , false , false ) ; }
Loads the plugin language file
 @param   string  $extension  The extension for which a language file should be loaded
 @param   string  $basePath   The basepath to use
Loads the plugin language file @param string $extension The extension for which a language file should be loaded @param string $basePath The basepath to use