Thanks a lot !
Your file is working perfectly! It's exactly what I wanted (and this dictionary is even better than what I found.
For the problem with the stylus: I think the program can't recognize the word because it's from a PDF. It works with an EPUB file.
I think the program can recognize the first letter of the word I've selected but not the whole word. I can see that, since with the button, when I select the word, the first letters are correct but it's not exactly the word I wanted (I have to scroll a little inside the dictionary).
(but while with the button I have at least the first letters correct, with the stylus it can't even put the cursor at the beginning of the word, since it's an unrecognized word I guess).