Nhlangwini/Ntlangwini (Hlangwane) is a Bantu language of South Africa. It is located along the border between Xhosa and Zulu, but is more closely related to Swazi.

The Nhlangwini/Ntlangwini people are the largest Nguni ethnic group in KZN South Coast - Highflats, KwaZulu-Natal - Mzimkhulu and in parts of the Eastern Cape areas such as Matatiele (kwaMzongwana and Makhoba) Tsolo,