Your visitor will see the site in English..
Good thing, this features is in roadmap
its lucky that the way the education system works that most people have English as a second language, i have a few people from France on my site who speak English good enough to get by and for those words they get stuck with and end up posting in their own language i get Google translate on the job and use it to also form a reply too.
The things is, its no good attracting members to your site that cant speak English or any other language that you cant speak because in reality you wont have a clue what they are talking about. so even if the site was automatically translated to their own, when they viewed your site, its useless unless the site automatically translated what they post to something you can understand too
complicated but im sure you get my drift...