Two more keyboard layouts and the corresponding merge requests: A German keyboard layout derived from the other European keyboard layouts and a Japanese keyboard layout based on the work of @dcz, but with a 12-key Kana layout.
The files for the layouts can be downloaded here: de.yaml and ja+kana.yaml.
The German keyboard additionally includes most of the French accented characters, but there was not enough space for all of them - sorry.
The Japanese layout is a classic 12-key Kana layout with additional layers of Latin characters and numbers. Maybe it could be used as the basic keyboard layout for Kanji lookup in the future - but that’s still far away.
Please test the layouts and give feedback
EDIT: Meanwhile, the two layouts have been merged - so there’s no need to download them manually any more. Nevertheless, I updated the links just in case.