Here's a new tool called Babelplex that leverages the mechanical translation technology from Yahoo (Babelfish) and Google.
Babelplex allows the searcher to build a query in one language and then have their search terms translated and executed in the "other" language with just one click.
Interesting. Links at the bottom of results pages allow you to view results using either Babelfish or Google translation software.
Of course, cavert emptor the max with mechanical translation.