Automatic language site selection by current locale

Maven site could generate different site for different languages, however, it would be really cool to show the language corresponding to the user's locale. I mean, if I visit my project site from France, it should show the France site automatically. If I visit from Colombia, the Spanish part. And from another country where the language is not translated the English part.
The main site, which is in English should check the current locale to see if there is a better page to show.
Currently, translated site are not very useful because they are not linked from English part.