Book excerpt: This is a timely book on one of the most widely debated issues in applied linguistics: what is the social and cultural significance of English as a lingua franca for the internationally mobile students of the 21st century in Central Europe? Through an in-depth analysis of social practices, the book develops an exciting, innovative multilingual approach to out-of-class language use and language learning that engages students in the co-construction of identities. Apart from scholars, the book will appeal to policy makers and educators who are concerned with the internationalization of universities in Central Europe.