A client will be translating their entire site into French in addition to English. For SEO purposes, should I host it on the same domain or create its own dedicated domain?

[JamesBSEO]

The current site is a long-standing site with good authority and a good number of links. Thanks....

[tylerfraser]

You should create a dedicated domain. I also recommend going after hosting in the languages' country that you most want rankings in. Check out Bruce Clay's International web - http://www.bruceclay.com