I currently can't bind some keys on the Linux build via the in-game menu. They worked fine on Windows but appear as "None" on Linux. The keys are mostly special characters that are used instead of the numbers on a french keyboard: ², &, é, ", (, è, _, ç, à, ).
The following keys are less useful but can't be bound either: ^, $, ù, *, :, !.
Finally, the two side buttons on my mouse aren't registered at all when trying to bind them (the selection doesn't change, not even to none). These keys are usually named Mouse4 and Mouse5.