Inagta Partido(Isarog Agta) or alternativelyKatubung[1]is a nearly extinctBikol languagespoken by a semi-nomadic hunter-gathererAgta(Negrito) people of thePhilippines.It is found onMount Isarogeast ofNaga Cityparticularly in the town ofOcampowhere the most recent survey of the language was conducted.[2]
According to Lobel (2013),[3]there are no speakers of Inagta Partido under 60. It is a moribund language. TheEthnologuecites a report from 2000 that there were then only five speakers from an ethnic population of about 1,000.[4]
Inagta Partido has borrowed heavily from Bikol languages such as Bikol Naga and Bikol Partido, but has a non-Bikol substratum.[5]
Imperial, Irvin Jen (May 2018).KATUBUNGI: A GRAMMATICAL DESCRIPTION OF ISAROG AGTA (KATUBUNG) AND SOME NOTES ON LANGUAGE ENDANGERMENT AND EXTINCTION(BA Thesis). University of the Philippines Diliman.