Actually, to be able to change a language, you have to go to the UCP (that mean you have to make an account first).
Problem is, if my website is in french and an american visits my forum, he will be lost and don't know how to make an account, and go to the UCP and then change his forum in english (if the user isn't using a lot phpbb forums of course).
So I was wondering if there could create a string "?lang=", that will allow us to change languages through the URL.
Some extra ideas :
-When somebody register on the website, his account automaticly set his language in his account in the language he was when he logged in.
Then he receives an EMAIL in his language to confirm the inscription.
If you don't understand, please ask question, i'm french and I had some trouble expressing myself here