I had download metadata for the english book from Amazon, and now on Kindle the dictionary used is the english one, great.
The question now is: I've already read 50 books on Kindle, and never before I download the metadata. How the Kindle knew that the book were in italian? :-/
I've bought this one
http://www.amazon.it/English-Italian...1992304&sr=1-2
but I don't know how to use it, I don't see it into Settings->Dictionary