@1116, I'm at my limit of experience. I'm unfamiliar with multi-language support. Anyone know if these dconf settings are still valid?
When you run Applications -> System Tools -> dconf Editor
and navigate the tree to org.gnome.desktop.input-sources.
Do you see entries in sources? Mine is blank:
It should have a list of keyboard layouts but I'm unable to confirm this. In a virtual machine, I attempted to load Russian and Ukraine languages and keyboards but unable to get this list.
Without this list, the commands could never work, if I read this right. Do you have a list in your system?