Plottable fonts are a thing! They're different from the "normal" font we think of, because they need to be a path to be traced instead of an outline to be filled.

If you already have curves, you can do that quite easily (maybe tediously, if you have to/want to do it manually).

Yes, but she uses different glyphs depending on which letters are next to each other, not sure if that is supported.

Fonts have supports for that. I know that the Urdu Jameel Noori Nastaleeq font, has hundreds (maybe more) of complete words hardcoded into the font.

You could use ligatures:

https://fonts.google.com/knowledge/glossary/ligature

Yeah, even "normal" fonts have ligatures (a couple common ones in many fonts are fl and ti though they don't appear to be used in the font being used to render this comment), so this is definitely no technical obstacle if one really wants a font. Obviously a bunch of work to create, but pretty cool to have!

Arabic language letters change based on their position in the word. And there's multiple fonts for it.

Indeed, I love how she's blending technology and art here.