Hello,
I've buy and install Alan Wake in french version. But when i launch the game, he start in english version (voice and text). And i can't change in french version. How can i change the langage. I want to play the game in french version. Thanks to help me and sorry for my bad english form.

I'm not particularly tech savvy myself, and from what I gather you said you installed the French version, but I would suggest you make sure you're downloading the French installer of the game by going to My Games>Alan Wake>Preferred installer version: French and then click the download button, which should say "Windows installer, French".

There probably is an option to change language in-game, but since I never needed it, I don't know.

Alternatively, check this post here on the Alan Wake GOG subforum:

http://www.gog.com/forum/alan_wake/changing_locale/post2

Click that. I just tested and both audio and text switch from english to spanish to japanese and back to english correctly. Execute as admin if does not work.

Thanks a lot groze and javihyuga. It's work. I can play the game. I'm happy. ;)