Site Search
If you have a large, content rich website, it may be worth considering implementing a search engine on your own site that specifically searches your site for information rather than the entire web. Generally I would use Google for this, but there are other options.
Bi-Lingual
If you are attempting to sell your products or services to the French marketplace, rather than just targetting the English residents, then it makes sense to implement your site in French (or potentially other languages).
My French is not particularly great, however, I know several people who can translate English to French extremely accurately - including my daughter. So no need to rely on automated translation facilities such as Babel Fish.
There are also simple services such as Google Translate.