A solution that allow some sort of user locale recognition would require custom scripting.
A few tips/words of caution
Although it is possible to translate the language of most pages the ecommerce checkout and the wording of any emails sent by the system can only be in one of several default languages (English, Spanish, German, French, Portuguese and (I think) Italian.. ..there could be more).
Automatic translation software can be very bad so I would advise choosing the key languages you want to support and concentrate on getting good quality translations made by a profession