Lake Balkhash
The Chagatai Khanate separated in 1266 and covered Central Asia, Lake Balkhash, Kashgaria, Afghanistan and Zhetysu. It was split between settled Transoxania (Ma Wara'un-Nahr) in the west and nomadic Moghulistan in the east. It is claimed that parts of them still spoke Mongolian until the late 16th century.