Following up on my post from yesterday, I dropped the Half-Elf and Dragonborn. But I realized I can keep Gnomes.
I decided that for each standard demi-human race, I can map one TSR-East race:
Dwarf = Koropokkuru
Elf = Tengu
Halfling = Vanara
Half-Orc = Dokkaebi
Gnome = Kumiho
Changeling = Spirit Born
There is still some fiddling to do, especially since some of the alternate races may have slightly different class selections than the standard, and definitely different abilities (halflings hide, vanara climb, for example), but in general, they more or less match up with the types of classes or themes I'd like for each race.
Also, I'll be able to break the rules down into layered options. 4 basic classes. Each will have optional (at the DM's discretion) subclasses presented. 6 advanced classes, which are basically the 2 class multiclass options of the basic 4 classes. Each advanced class will have a subclass that toggles them between "Western" and "Eastern" versions. Still working on names for some of these. I have names, but I'm not certain I've got them all down right yet.