Maria Rosa Garrido Sardà is Associate Professor of English Language and Linguistics in the Department of English and German at the Autonomous University of Barcelona (Catalonia, Spain). She authored Community, Solidarity and Multilingualism in a Social Movement: A Critical Sociolinguistic Ethnography of Emmaus (Routledge, 2021).

Miguel Pérez-Milans is Professor of Language, Discourse, and Communication in the UCL Institute of Education at University College London, UK. His previous publications include Urban Schools and English Language Education in Late Modern China (Routledge, 2013) and co-editor of The Oxford Handbook of Language Policy and Planning (2018).