Game does not recognize special characters while key binding in controls.

Hello,

since i am left-handed i am not using the normal WASD keys for moving but i am using (normally) the keys OKLÖ. I am german so my language has special characters on keyboard such as ö,ü,ä. When trying to bind these in my controls the game does not recognize them.

I am using Windows 7 and Starbound is updated to the newest version. I am not using any mods. The game did not crash and worked fine afterwards. I also tried changing my keyboard mode from German to English without success.
A fix would really be appreciated since it is really confusing to use other keys in this game than i am using in different games.