@FOSSingularity@strangeobject.space Did you enable both "Opportunistic word completion" and "Toggle via OSK menu" in phosh-mobile-settings under "Text completion" in the "On Screen keyboard" tab"?

If so try gedit or chatty. Both should enable the completion bar automatically. If you then switch to a language layout (e.g. "German") and phosh-osk-stub doesn't find a matching dictionary it should print an error message to the logs hopefully telling you what's wrong.