Comment # 12 on bug 1106673 from Aender Boy

removing `none` from `FONT_MAP=` in /etc/vconsole.conf and messing around with
dracut and mkinitrd afterwards removed the error message, but either the luks
pw prompt was still using english keyboard layouts or brought me to a rescue
root shell after entering my luks pw, telling me about some issue with my
keyboard(-layout?). 

https://en.opensuse.org/SDB:Encrypted_filesystems lists this bug as a known
issue at the heading "international keyboard layouts"