How can I find the english version of XD2? Did I miss something?
I think so. I guess that the selected language was saved as French the first time you initialized the game, so I guess that you need to select the language again in the corresponding menu. Did you check the "options" menu to change the language? (Look for it somewhere in the game.)
EDIT: another way (a dirty way) to change the selected language is to open the file settings.dat in your savegame folder (it will be somewhere in your computer, and that folder depends on your OS), and then replace the line
language = "fr"
with this new line
language = "en"
EDIT 2: in the options menu, you can read above in French "press space to select language" (necessary to choose language). But since you don't know French, you didn't understand that and so you didn't know that you needed to press space (or maybe you didn't even read that line).