If anyone else runs into this there are two solutions. Install the same keyboard twice then Wayland recognizes it or move to X11. I switched to X11 so can't say how well the first solution works.

My keyboard is configured as Swiss German with Greek and Japanese as alternatives.

Following updates yesterday the keyboard used by Termit seems to be American, the y and z keys are switched and the accented characters are gone. I have checked with Emacs (GUI), Firefox-esr, the keyboard remains Swiss German. With Emacs (terminal version), Kate, Libre Office, Filezilla the keyboard seems to be some sort of English layout.

Further testing today show that when logging into the box I am using a Swiss German Keyboard to enter the password. When logged into to KDE the panel shows I am using Swiss German.

When I open a terminal and press y the first time it prints y but second and subsequent key presses print z so I get something like this.

richard@devuan:~$ yzzzzzz

Clearly it is changing to QWERTY after the first key press.

Any suggestions as to what could have happened?