The Aché Documentation Project (ADOP) documents the language, practices, and cultural knowledge of the indigenous Aché groups of eastern Paraguay. This project focuses on the traditional language of the communities in all its varieties. Data include audio and video recordings of mythology, life history narratives, cultural practices, and traditional songs. Recordings are annotated in ELAN and Toolbox-files. A second project—the Aché Language Studies Project (ALSP)—investigates language contact in history and as the result of present-day cultural contact and change. The coordinators of both projects are Jost Gippert and Sebastian Drude. Research is being conducted by Eva-Maria Roessler, Jan David Hauck, and Warren Thompson.