In 2010, UNESCO released its 3rd volume of Atlas of the World's Languages in Danger, where three critically endangered languages were in the Philippines. One of these is the Isarog Agta language, of the Isarog Agta people, who live on Mount Isarog and are one of the original Negrito settlers in the Philippines, belonging to the Aeta people classification but with language and belief systems unique to their own culture and heritage.