The document describes Situated Mobile Language Learning, a project that developed an app called Lingobee to support mobile language learning. [1] Lingobee allows users to collect language examples encountered in everyday life, annotate them, and share them within a community of other language learners through the app and website. [2] The app was designed through a participatory process with students and teachers to make language learning more authentic and relevant through incidental learning experiences outside the classroom. [3] Early trials found benefits but also issues to address regarding authoritativeness, integration into teaching, and preventing misuse.