We personally only handle translations between English and German. If you need services in other languages, please consider the following translators. In my capacity as a German translator and project manager at X-Rite I have to handle a lot of languages, I am working with the translators below for up to 10 years and we have been very happy with their services. I can highly recommend them:

All translators use Trados or a fully compatible tool. I personally don't care what they use as long as my files come back flawless.