This project seeks to document and describe Northern Chaco Mocoví (NCM), an underexplored variety of Mocoví, a Guaycuruan language from the Argentine Gran Chaco region. The study of NCM communities offers a new sociolinguistic context for developing a thorough, multimodal, and accessible documentation of Mocoví, with a strong emphasis on video documentation. Additionally, a typologically informed morphosyntactic description of argument structure alternations in NCM will expand our understanding of Mocoví dialectal variation and its motivations. In close collaboration with Mocoví community members, this project will also develop pedagogical materials for educational purposes and Mocoví promotion in Chaco. Primary investigator: Cristian Juárez