This work presents the study and development of a serious game prototype aiming at children and teenagers from the yawanawá Brazilian indigenous group. Since the 1980s, community leaders have sought to revitalize their traditions and preserve their language – the number of fluent speakers has been plummeting, and newer generations mostly only speak Portuguese. This project seeks to help the indigenous educators in this endeavor, providing an entertaining computational solution to complement the learning process. The result was a cross-platform (Android and iOS) mobile application, still in the prototype phase.