“This book masterfully maps the development and current lines of research on Language Policy and Planning. It will certainly help readers to navigate in this particularly complex field, and to understand why language policies are often at the core of quite sensitive political conflicts.” - Roberto Garvía, Professor of Sociology, Universidad Carlos III de Madrid, Spain “This is an outstanding contribution in the field of language policy and planning. The authors provide a comprehensive overview of key concepts, terms, and controversies in an accessible style that will be of great interest to scholars and practitioners for years to come.” - Thomas Ricento, Professor Emeritus, University of Calgary, Canada This book advances the growing area of language policy and planning (LPP) by examining the epistemological and theoretical foundations that engendered and sustain the field, drawing on insights and approaches from anthropology, linguistics, economics, political science, and education to create an accessible and inter-disciplinary overview of LPP as a coherent discipline. Throughout the book, the authors addressLPP from different perspectives, exploring the interface between planning in theory and its practical problems in implementation. This volume will be of interest to students and scholars with an interest in LPP in particular, and educational, social, and public policy more broadly. Michele Gazzola is Lecturer in Public Policy and Administration at the School of Applied Social and Policy Sciences at Ulster University, UK. Federico Gobbo is Full Professor on the Special Chair of Interlinguistics and Esperanto by special appointment at the University of Amsterdam, the Netherlands. David Cassels Johnson is Associate Professor of Multilingual Education at the University of Iowa, USA, and Visiting Professor in the Center for Language Planning and Policy Studies at Shanghai International Studies University, China. Jorge Antonio Leoni de León is a Full Professor of Computational Linguistics at the School of Philology, Linguistics and Literature, University of Costa Rica in San José and director of the Institute of Linguistic Research (INIL).