Unsupported keys with foreign keyboard on Linux

I'm using a french keyboard (azerty layout). Now that the hotbar can finally be used thanks to the new keybinding menu, I changed controls to fit my keyboard. But some keys are displayed as "NONE" in the menu and do not work correctly in game.

&, é,", (, è, ç are reported as "NONE"
', -, _ work fine

When pressing one of the NONE key, the game switch to the last slot (bound to ç). I guess the game consider all these keys to be the same and use the last action bound to this key.

Some other keys have the same issue but I cannot be exhaustive :
), $, *, ^, ù, !, <
^ is a dead key and must be typed twice.