Pangea Chat is an instant-messaging platform designed for language learning, allowing students to "learn a language while texting their friends." We use students’ interest in messaging and being connected to peers to fuel language learning and practice while using AI to provide a unique and personalized experience that caters to each students’ proficiency level and interests. By removing common barriers to communication and meeting learners wherever they are in their language learning journey, Pangea Chat allows even beginner learners to communicate in their target language from day 1. Our in-app learning tools help students both compose and understand messages they receive in their target language and create unique learning opportunities from their errors. For teachers, Pangea Chat provides in-depth analytics of students' progress and allows for critical, tailored feedback to reach all students faster and more efficiently.