Welaun didokumentasikan oleh Hull (2003)[5] dan Edwards (2019). Edwards (2019) memperkirakan populasi penutur sebanyak 5.575.[2] Kamus Welaun telah ditulis oleh da Silva (2012).[6]
↑Hammarström, Harald; Forkel, Robert; Haspelmath, Martin, ed. (2023). "Welaun". Glottolog 4.8. Jena, Jerman: Max Planck Institute for the Science of Human History. ; ;
↑Hull, Geoffrey. 1998. "The basic lexical affinities of Timor's Austronesian languages: a preliminary investigation." Studies in Languages and Cultures of East Timor 1:97-202.
↑Hull, Geoffrey. 2003. Lia-Bekais nia Fatin iha Dalen-Lubun Tim´or. Studies in Languages and Cultures of East Timor 5:55–78. (In Tetun Dili.)
↑da Silva, Eng. Guilherme ‘Puru-Berliku’. 2012. Disionáriu Wekais-Tetun. Dili: Secretaria de Estado da Cultura.