Module Translation does not work

I can’t have this work.
I tried to add the translate in the module.
I tried to create an extention instead.
I clicked and restarted in the Vassal preferences.
Nothing changes : everything stays in English !
Only thing I could have worked is to use 2 images for each cards, 1 english, 1 french, and set a button to modify the Level.

Any idea ?
Should I replace the whole game with anoyther version ?