This book examines the language policies relating to linguistic rights in European Union law and in the constitutions and legal statutes of some European Union member states. In recent years, the European Union has seen an increase in claims for language recognition by minority groups representing a considerable population (such as Catalan in Spain and Welsh in the UK). Additionally, there is a developing situation surrounding the official use of English within the European Union in the aftermath of the Brexit vote. In light of these two contexts, this book focuses on the degree of legal protection afforded to linguistic groups in the European Union. It will be of interest to students and scholars of language policy, EU law, minority languages and sociolinguistics.