[fatidik]

It's a bit hard to sort something out in all the answers as everyone has practically recommended a different device...
For what I understanding from my reading...
Official Kindle dictionaries are not offering most of the dictionaries I'm interested in.
(base French or English to Spanish, Italian, German, Portuguese, Romanian, Greek, Russian, Serbian, Turkish, Swedish... for now).
Sony and Kobo, not so many more options..
The latest option would be if I got it right, to hack a device and try to install a Babylon-like app. Which sound like a hell of headache!!!

And to be clear, I am looking for an e-ink device, otherwise I would go for a tablet of course, with more flexibility with apps.

The easiest option sounded the googletranslate option. I am not a big fan of this service as a dictionary though, but the idea of an online service is not bad. At least, when reading at home...
Which device allow to set customized online searchs and how is it integrated in the display?