In my experience you'll get them regardless of wheter your website is translated or not. For simple things you might be able to get along with Google translate (make sure to include both english and translated version in email, so they can get help from an english speaker in case the translation is gibberish)

It depends what kind of website you run, of course this doesn't apply to everyone....and you need to build your own strategy in terms of how it works and how it will work.

But if done properly, the potential is limitless and it's a cost-effective way of reaching new customers.