I'd like to shortcut some very often used keystroke combinations in spacemacs to my umlauts (as they are unused otherwise). I mapped all my umlauts in vim easily, so I thought, this should be easy in spacemacs, too.
I tried to define (global-set-key [?ä] 'helm-projectile-switch-to-buffer) also with "ä", but this does not recognice the ä as it as non-ascii character. (In the end I might want to define only C-ä or only set in evil-normal-states), but I just wanted to get something running.
The .spacemacs file is already encoded as utf-16 (don't know whether it's good or not). I used emacs 25.2.2 with spacemacs Release 0.200.13.x on my ubuntu 18.04.
I also tried to write [? and press C-q and then pressed ä] as described somewhere. But did not change anything. Also if I run od -ta from command line, I see that I would get an ASCII sequence for something like F2, but not for ä.