Dinka, or , is a Nilotic dialect cluster spoken by the Dinka people, the major ethnic group of South Sudan. There are five main varieties, Ngok, Rek, Agaar, "Dinka Leekrieth and Bor, which are distinct enough to require separate literary standards and thus to be considered separate languages. Jaang, Jieng or Moinyjieng is used as a general term to cover all Dinka languages. Rek is the standard and prestige dialect.