The Antsi (Anchi) language or Mag-antsi (also Mag-Anchi Ayta) is a Sambalic language with around 4,200 speakers. It is spoken within Philippine Aeta communities in the Zambal municipalities of Botolan, San Marcelino, and Castillejos; in the TarlaqueƱo municipalities of Capas and Bamban; in Mabalacat, Pampanga; and in Angeles City. The use of the language is declining as its speakers are shifting to Kapampangan. The language is mutually intelligible with Mag-Indi Ayta (77%) and Ambala Ayta (65%).