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Mal, also known as Thin, is a Mon–Khmer language of Laos and Thailand. It is one of several closely related languages which go by the names Thin or Prai.
Tayten (300 speakers as of 1995) is spoken in the 2 villages of Ban Phia and Ban Tenngiou in Pakxeng District, Luang Prabang Province, Laos. It is either Thin or Tai Then.
References
Mal at Ethnologue (18th ed., 2015) (subscription required)