Book excerpt: The aim of this book is to document the experiences of institutions and states that are implementing bilingual higher education policies in the legal context, to identify the different approaches and to suggest some of the likely areas for future theoretical development. It examines the role of higher education language policies (medium-of-instruction policies in higher education) in mediating the tension between on the one hand the centralizing forces of stated-mandated policies and globalisation and demands for language rights by ethnic and linguistic minorities on the other.