Special Characters cannot be bound in Linux version

[virenne]

Hello, I have a Turkish qwerty keyboard and language specific characters cannot be bound as controller keys in Linux version (they're working on windows and android). the keys are: ı ğ ü ş ö ç
it would be great if someone tell me a workaround or even a patch for this issue.

I use debian 64 jessie latest stable with xfce desktop (don't think it matters though)

also, do you think there's any major performance differences between windows and linux on intel gpu? i haven't really noticed anything by far but if its worse i'll just stick to windows.