This project advances decolonial HCI and participatory design through a practice-based collaboration with a cooperative organisation of Masewal Indigenous People, in Mexico. Emphasising land, language and ancestral knowledge systems, it explores how this community appropriates technologies to strengthen autonomy, activism, identity and preservation. The research designs collaborative approaches for a community-led database, and develops three entwined contributions: the framework of Cosmovision of Data, participation methods emerging from Indigenous traditions and cooperation values, and the notion of Digital Territories.

The contributions provide theoretical, methodological and practical guidance for HCI and participatory design, to rethink data as embedded in the land and situated within intricate ecological, social, language and spiritual relations. It argues for placed-based, activist and epistemology-aware technologies, and offers pathways for long-term, reciprocal partnerships that emphasise Indigenous self- determination. These approaches could support diverse communities in reimagining technologies, addressed from the material, social and digital dimensions of different territories.