Complex sentence: Kadai, Vietic and Sino-Tibetan languages, while the Afroasiatic, Nilo-Saharan, Khoi-San and Niger-Congo languages of Africa are dominated by register systems.
Split into simpler sentences: Kadai, Vietic and Sino-Tibetan languages. The Afroasiatic, Khoisan, Niger-Congo and Nilo-Saharan languages spoken in Africa are dominated by register systems.