|Region||North Sentinel Island; southeast Andaman and Nicobar Islands, Sentinel Island.|
|Ethnicity||Perhaps 100–250 Sentinelese people (2007)|
|(Presumably the same)|
Unknown, possibly Ongan
Sentinelese is the presumed language of the Sentinelese people of North Sentinel Island in the Andaman and Nicobar Islands, India. Due to the lack of contact between the Sentinelese people and the rest of the world for the past three centuries, nothing is known of their language. There is no way to know the vitality of Sentinel as the people do not allow outsiders onto the island, and are very hostile towards them.
It is presumed that the islanders speak a single language, and that it is a member of one of the Andamanese language families. Based on what little is known about similarities in culture and technology and their geographical proximity, it is supposed that their language is related to the Ongan languages, such as Jarawa, rather than to Great Andamanese. On the two documented occasions when Onge-speaking individuals were taken to North Sentinel Island in order to attempt communication, they were unable to recognise any of the language spoken by the inhabitants in the brief and hostile exchanges that resulted.
Sentinelese is classified as endangered due to the small number of speakers, which is unknown but has been estimated at anywhere from 100 to 250; a rough estimate by the Government of India is 100.
- Brenzinger, Matthias (2007) Language diversity endangered. Walter de Gruyter. p. 40. ISBN 3-11-017049-3.
- Moseley, Christopher (2007) Encyclopedia of the world's endangered languages. Routledge. pp. 289, 342. ISBN 978-0-7007-1197-0.
- Hammarström, Harald; Forkel, Robert; Haspelmath, Martin; Bank, Sebastian, eds. (2016). "Sentinel". Glottolog 2.7. Jena: Max Planck Institute for the Science of Human History.
- "The most isolated tribe in the world?" found at Survival International website. Accessed 2009-10-07.
- Van Driem, G. (2007). Endangered Languages of South Asia. In Handbook of Endangered Languages (pp. 303–341). Berlin: Mouton de Gruyter.
- Ethnologue report for Sentinel. Accessed 2009-10-07.
- Pandya, Vishvajit (2008) In the Forest: Visual and Material Worlds of Andamanese History (1858–2006). University Press of America. p. 361. ISBN 0-7618-4153-9.
- McDougall, Dan (12 February 2006) "Survival comes first for the last Stone Age tribe world: Two poachers lie in shallow graves beside the Indian Ocean after they trespassed on an endangered tribe's island. Now even relatives of the victims' want the killers left alone." The Guardian.
- Abbi, Anvita (2006) Endangered Languages of the Andaman Islands. LINCOM Studies in Asian Linguistics. Vol. 64. München: Lincom