So, I have contacted all of the parties in Duvar and Issano to see if they were okay with the East Asian based Lagim ethnic group. I have yet to hear from them.
If they do accept then I have a couple ideas for the Lagim majority nations.
First of all, I think that Quicho, given its name and status as the homeland of the Lagim, best represents China and Tibet. It shares a border with Pucina (India), which would explain for the Indian/Middle Eastern influences. It is also the largest in terms of geography of the Lagim majority nations.
As for Issano, I was thinking they could be representative of Mongolia and Vietnam. They share the border with Pucina, plus the Jabi make up a larger percentage of their population. Also, they share a border with Quicho, meaning that they could have, in history, raided Quicho quite frequently.
Now for Duvar. My best guess would be that Duvar represents Korea. A small portion of Duvar has a Zarbi majority. This will account for its more Korean culture as Korea is a mix of both Chinese and Japanese cultures.
Obviously this is not set in stone unless the parties of Duvar and Issano agree to it. This can be changed.