In our view, the most important aspect of content management systems handling multilingual sites is the problems they cause with URLs containing lots of numbers and digit style parameters - instead of the normal words which users are looking for.

This is exacerbated in languages other than English because often the parameters will use English words - which don't assist with the performance of the page in the search engines. For instance, a car sales page might be called www.carsalesite.fr/?ID=car3264 - when the target language would prefer 'voiture'.

So you have to look out for a multilingual content management system from the outset.