Maybe everybody knows this, but I was not aware -- if you create backup of layouts.conf, rename and leave .conf suffix, keyboards starts to multiply and after few switches active keyboard dissappear. This gave me idea that maalit will read all conf files in /usr/share/maliit/plugins/com/jolla/layouts/. So what I did -- instead of modifying original "layouts.conf" with additional definitions I made new "custom-layouts.conf" file and filled with custom keyboards. I don't know if this is "proper" way, but it works. Usefull? Maybe