 <p>You can easy add it as static param to url manager rules. I recommend using urls in form <code>/en/controller/action</code> etc, so first parameter is always language. I'm using this approach for long time and works like a charm.</p> <p>For details check this answer: <a href="http://stackoverflow.com/a/4625710/133408">http://stackoverflow.com/a/4625710/133408</a></p>