Originally Posted by polly
I don't think that any of them will translate phrases for you. The Sony has integrated dictionary support with five languages supported (French, Italian, German, Spanish, and Dutch) for translation to and from English. There are also two English language dictionaries that provide definitions. Double tap on a word and a little window pops up at the bottom of the page with the definition. Tap anyplace on the page outside the window and the window goes away. Tap inside the window and you get the full dictionary page.
The OP, however, requires a French dictionary, not a translation dictionary. The Kindle is, I believe, the only one to which a "proper" French dictionary can be added. It doesn't ship with one as standard, but you can buy one in the Amazon Kindle store.