To identify the keywords used by your competitors in their pay per click campaigns, there a few tools aout there. Most work on .com domains.

But some effort seems to into other languages.

The keyCompete
http://www.keycompete.com/home.asp
and
http://www.longtailadwords.com/
seem to produce a result for .fr and .uk

both Tiger Technologies. They let you try a few keywords and domains for free. Worth it ?