This book addresses the importance of language in matters of sustainability and incorporating such concerns in implementing the UN's Sustainable Development Goals (SDGs). Sustainable language policy must aim to include all groups, including language minorities and marginalized populations, such as refugees and aid recipients, in conditions that allow for their inclusion in making and implementing policy. The book brings together nine studies covering such topics as language and digital resources, sustainable and inclusive multilingual education, national language policy, and language in peacekeeping operations. A final chapter addresses the crucial intersection between sociolinguistics and economics, and the implications of this for development and the SDGs.