Switching Languages

[eluser]Brahm[/eluser]
Hi Folks,

In my config file I am using this:

$config['language'] = "portugues";

I want to switch to english language in my controller according some situations and I am using this:

$this->lang->load('system', 'english');

system is a file in language folder: language/english/system_lang.php

this is not working. wich is wrong ?

thanks.