Chorote, Nivaclé and Kadiwéu are three poorly known endangered languages of southern Chaco (South America). Three specific needs guide the research in this project: the need for documentation, not only in printed form but also audio and audiovisual; the need for comparative and historical studies of the Matacoan and Guaycuruan languages; and the need for revitalisation efforts. By the end of the project, the following goals will be achieved: the publication of two dictionaries, one for linguists and one for the indigenous communities and non-linguists; the publication of two collections of texts, one for linguists, another for the indigenous communities and non-linguists; the publication of two basic reference grammars, one in Spanish or Portuguese, the other in English; a website; a web-accessible lexical database with grammatical notes; and a corpus of catalogued recordings to be archived and made accessible to a wider audience. Additionally, a culturally and geographically appropriate questionnaire for native languages of the Chaco region will be designed and made available for linguists interested in the languages of the area. Primary investigator: Veronica Grondona