Plan 9 itself is really hard. I was never even able to change me keyboard layout. Not that I gave it very much effort.
Yeah it is hard. I think to change the keyboard layout you have to edit the source code, I'm not sure. I use an US qwerty.
I love Plan9 interface, but never got used to their mouse-centric user interface. I actually like CWM - being similar to Plan9 look and feel.