Faolyn
(she/her)
I would assume that any one nation would have multiple cultures in them. Depending on ones social status and personal history, an urban setting could have Imperial, Cosmopolitan, Tyrannized, Collegiate, and Tunneler (Tunnel Halfling) all within the same borders.I actually think this approach can be ultimately a little more limiting. Tunnel Halfling, for example, does pretty well for anyone inside an urban partisan resistance movement, and it's a little weird to have nationalities standing alongside "Collegiate" and "Circusfolk" which presumably could grow up in those same nations.
It's easier to reskin Forest Gnome to represent say, being raised by a tree spirit, than than it is to reskin the Singlennti people to that same end.