Typst authors being germans, one can hardly accuse them in the "everyone uses English" attitude.
Typst `dif` math operator (as in dx/dt) produces upright 'd', quite unexpected to ones used to slanted 'd' tradition.
> I would indeed expect an upright 'd'. It's an operator, not a variable. I don't recognize the tradition you're mentioning.
That's strange. I've never seen a math article in English with upright 'd' differential, only have seen it in German and Spanich articles. It's also
math italic in TeX (you can check Knuth's TeXbook).
