Yep, that’s why I wasn’t sure, because I never tried different-locale supporting font on TTY. But here is a helpful thread, maybe it’ll work.
And yeah, KDE is pretty insisting on its configs. I’ve tried to declare the config files via nix but only had more issues afterwards with different cache folders etc… You might want to manually set some stuff, but as far as I can see it’s mostly OK now except the model.