Enable spellcheck from different keyboard

axl

FUTO Keyboard's spellchecker doesn't seem to be working. Other keyboards' spellcheck, such as OpenBoard or Fossify, work just fine, but I have to be using that keyboard, when I'd rather use FUTO.

Is there a way to swap out the spellcheck so I use e.g. OpenBoard's spellcheck with FUTO Keyboard selected?

Dumdum

axl
Settings > System > Keyboard > Spell checker ???

axl

Dumdum
It doesn't work. If I select OpenBoard's, the swiggly red line only shows when I have OpenBoard Keyboard selected while typing. This goes for every keyboard; if I switch the keyboard, i.e. spellcheck doesn't match selected keyboard, spellcheck doesn't work.

FUTO's spellcheck does not work for some reason despite all my attempts. So the plan is to use another keyboard's spellchecker with FUTO keyboard active.