Pãi Tavyterã is a Guarani language spoken by about 600 Pai Tavytera people in eastern Paraguay, in Amambay, eastern Concepción, eastern San Pedro, and northern Canindeyú Departments. The language has 70% lexical similarity with the Kaiwá language, spoken in Brazil. Among Pai Tavyetera people, language use is shifting towards Guaraní.