multi-language site organization

[eluser]Mit[/eluser]
In advance: I'm sorry if my question happens to be too lame.

I consider using CI for a site with 3 or more languages (all the site's parts will be the same, I'll just use language file).

I have thougnt of a few options to organize the site, but the one that really stuck in my mind is using something like this:

http://mysite.com/en/class/function/ where en would be one of those: en, de, ru . This would give the best perma-links .

so I guess I want to run some code to include the language files before the code continues to the classes and in the sametime rerout to them.

PLS help me with this scenario.

And I will be happy to hear how you would organize such site