Phuthi
Phuthi is an Atlantic-Congo language spoken in South Africa and Lesotho, by about 20 thousand people. Glottolog rates it threatened.
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Phuthi (Síphùthì) is a Nguni Bantu language spoken in southern Lesotho and areas in South Africa adjacent to the same border. The closest substantial living relative of Phuthi is Swati (or Siswati), spoken in Eswatini and the Mpumalanga province of South Africa. Although there is no contemporary sociocultural or political contact, Phuthi is linguistically part of a historic dialect continuum with Swati. Phuthi is heavily influenced by the surrounding Sesotho and Xhosa languages, but retains a distinct core of lexicon and grammar not found in either Xhosa or Sesotho, and found only partly in Swati to the north.
The documentary origins of Phuthi can be traced to Bourquin (1927), but in other oblique references more than 100 years from the present. Until recently, the language has been very poorly documented with respect to its linguistic properties. The only significant earlier study (but with very uneven data, and limited coherent linguistic assumptions) is Godfrey Mzamane's 1949 article.
From Wikipedia · Phuthi language · CC BY-SA 4.0