What is what language do sentinelese speak?

As an AI language model, I do not have all the information about the Sentinelese community, but from available sources, it is believed that they speak their own unique language, which is not related to any known language. The language is only spoken within the tribe and not mutually intelligible with any other language in the Andaman and Nicobar Islands. It is difficult to study the language of the Sentinelese people because of their isolation and avoidances to contact with the outside world.