Darth Game Master's page

In the section of Book of the Dead where he discusses burial practices, Geb references the Isharri people from "the frozen north" (I assume the Crown of the World, but possibly far-northern Casmaron?), and people called Koryus Islanders who he describes as seafarers. Have these cultures been mentioned or described elsewhere? Does anyone know where the Koryus Islands are supposed to be?

I was just looking at the Kibwe section of the Mwangi Expanse book and one of the languages spoken in the city is Uwani. However, I can't find that name anywhere else in the book, a search on Pathfinder Wiki doesn't show anything, and I don't recall reading it anywhere else. Where is the Uwani language from and who is it spoken by? Or is it just a typo?