"Chongzuo Tai, also Chongzuo Zhuang, are a putative group of divergent Zhuang languages of southern China. Together with the Caolan language of Vietnam, they constitute a primary branch (branch 'C') of the Tai languages in the classification of Pittayaporn (2009):Yongnan Zhuang of Chongzuo (\u5D07\u5DE6)Yongnan Zhuang of Shangsi (\u4E0A\u601D)Caolan of VietnamThe two varieties of Zhuang are among 36 investigated by Zhang (1999)."@en .