On further testing it appears it's just Preferred language (system) in System Preferences > Language & Region that needs changing. Region or Keyboard don't cause it at least from changing it for me.
I couldn't recreate it in Danish myself but was by another. I checked with Russian and it crashed each time on Character launch.
To dobre wieściAfetr 1.1.3 Polish language works as well.
 Glad it seems to be fixed now for all.
  Glad it seems to be fixed now for all.