タングート
Tangut was one of the official languages of the Western Xia dynasty, founded by the Tangut people in northwestern China. The Western Xia was annihilated by the Mongol Empire in 1227. The Tangut language has its own script, the Tangut script. The latest known text written in the Tangut language, the Tangut dharani pillars, dates to 1502, suggesting that the language was still in use nearly three hundred years after the collapse of Western Xia.