MOOCs for language learning offer opportunities for communication to help develop learners’ productive skills in the target language, but these environments can also be challenging for learners, which may result in a disconnect between promise and reality. The chapter introduces MOOCs and language MOOCs (LMOOCs), considering their purposes and the reasons why learners enrol in LMOOCs. Communication opportunities and challenges in LMOOCs are reviewed, and relevant findings from research and practice are identified. Special consideration is given to the provision of feedback to learners. Fostering speaking among learners has generally been a challenge, due to the scale and openness of LMOOCs. The chapter offers recommendations for research and practice relating to the educator’s role, learners’ autonomy, affordances of communication technology, integration of LMOOCs into classroom practice, and cultural issues in communication. It is also recommended that MOOC providers should work together with educators to provide learners with adequate and innovative technological tools to facilitate their productive skills practice. Future directions are identified, emphasizing scalable methods of analysing learner activity and taking advantage of developments in artificial intelligence, including ways of supporting learners through interactions with conversational agents.