incrediBILL - 6:06 am on Dec 3, 2012 (gmt 0)
...or you could just block all translators like I do.
Content can be scraped first and then translated or translated from cache if you don't use NOARCHIVE, or from the Internet Archives if someone allows them to crawl.
I allow translators because I run a worldwide site but the user agent must be valid and they can't take too many pages or they get squished. I also check the forwarded IP for validity.