Hello !

If this is for the front office, you can change the file local/config/contexts.config.php

Here you can define sites and locales.
The association between the two create a "context" that will appear into your back office.

I suggest you to see the link below to learn much about contexts.
By Foine , 25 February 2015 ·
To
    ou Annuler
support for mutiple languages
By Mary , 25 February 2015
To

Hello,

What's the best way to add different languages to my site?

Thanks!