I will need to be writing on a subject of cultural differences between two populations/cultures in the context that one of them is located in the mountains and the other on a plateau/plain.
Is there a word I can use so that I don't repeat "people who live in the mountains" or "people who live on the plains"?
Thus say "The people who live in the mountains mainly work in harvesting wood and mining" becomes "X mainly work in harvesting wood and mining".
And "The people who live on the plains mainly raise cattle" becomes "Y mainly raise cattle".