And, if they have all of the required spells, it should be easy enough to copy/paste the Tiefling model and add all of their sub-races:
Baalzebul
Dispater
Fierna
Glasya
Levistus
Mammon
Mephistopheles
I'm curious if the Tiefling subraces will have unique appearance differences from each other, like wil you be able to tell a Zariel Tiefling from an Asmodean Tiefling, from a Fierna Tiefling like you can between Elf and Dwarf subraces.