Original sentence: Some scholars believe that Yemen remains the only region in the world that is exclusively Semitic, meaning that Yemen historically did not have any non-Semitic speaking people.Yemeni Semites derived their Musnad script by the 12th - 8th centuries BC, which explains why most historians will date all the ancient Yemeni kingdoms to the 12th - 8th centuries BC
Edited sentence: Some scholars believe that Yemen remains the only region in the world that exclusively is Semitic, meaning that the Yemen didn't have any known Non Semitic speaking people through history (with a possible exception of some probable Kushitic substratum).Yemeni Semites derived their Musnad script by the 12th - 8th centuries BC, which explains why most Historians will date all the ancient Yemen kingdoms to thr 12th - 8th centuries BC