found: Wikipedia, Aug. 16, 2016:Tetum language (Tetum, also Tetun, is an Austronesian language spoken on the island of Timor. It is spoken in Belu Regency in Indonesian West Timor, and across the border in East Timor, where it is one of the two official languages. In East Timor a creolized form, Tetun Dili, is widely spoken fluently as a second language; without previous contact, Tetum and Tetun Dili are not mutually intelligible. Language family: Austronesian - Malayo-Polynesian (MP) - Nuclear MP - (Central--Eastern) - Timor--Babar - Tetumic - Tetum)
found: Omniglot website, Aug. 16, 2016(Tetum (Tetun, Lia-Tetun). Tetum is a member of the Malayo-Polynesian branch of the Austronesian language family. Tetum is spoken by about 800,000 people mainly in East Timor (Timór Lorosa'e / Timor-Leste), where is has been an official language, along with Portuguese, since 2002 when East Timor became independant. It is also spoken in West Timor, which is part of Indonesia.)
found: Government of Timor-Leste website, Aug. 16, 2016:Timor-Leste > About (Official Languages: Portuguese and Tétum (national language))