Seems fixed in French:

http://translate.google.com/#auto/en/combien%20de%20kilom%C3...

But works with yards too! (including French)

http://translate.google.com/#auto/fr/how%20many%20yards%3F

I now want to make a table recording correct/incorrect translations between the metric system and the imperial system! This is going to be an unproductive day.

EDIT: it even works in Spanish if you forget the accent on "kilometros" http://translate.google.com/#auto/en/cuantos%20kilometros%3F