Alan suggests..
A QWERTY layout option for the letters might make it a bit smoother. Hard to say without trying it, I guess.
Yup, sure would!
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On Desktop, it'd look a bit like this..
Whilst on an iPhoneX, it'd be..
and, IMO, that's a teensy weeny bit too scrunched for your fingers!
I might have to add it in as an option or something.
What I REALLY need to do, is create a simple reuseable keyboard function. At the moment, it's a different per-script thing, and that's starting to get a little messy!