Made a sloppy sketch about how the mechanics of Claw Nibs would work.

Cats can dip their fingers in a pan of ink, then with precision on each finger, write their script at around 180 wpm. It's hella impressive for cursive!

As for for the actual language of thr writing? I'll…get to that later.

I also looked it up, and Arabic is not written vertical, just Chinese and Japanese scripts. No idea what other languages use vert script.