[Linux] Unusable number keys on AZERTY keyboard

I am unable to use most of the number keys (0-9) to switch weapons on my AZERTY keyboard. The problem is that with an AZERTY keyboard you need to press SHIFT+1 for example if you want to write 1, so I have tried rebinding the same keys without the SHIFT modifier in the NS2 options, but it just doesn't work for most of them as if I just didn't press any key.
Here's the AZERTY keyboard layout:
https://upload.wikimedia.org/wikipedia/commons/d/d6/Azerty_fr_laptop.svg
When I try to set & as the slot1 key, the option menu shows "2" (wtf?), but this one works.
When I try to set é, " for slot2/slot3 keys, nothing happens.
When I try to set ' for slot4, the option menu shows "Apostrophe", so I guess it works.
When I try to set ( for slot5, the option menu shows "9" (wtf?), but I guess it works.

I am used to switch weapons with these keys, it's quite annoying to have to do it with the mouse wheel now.

PS: It works fine on Windows.