Mark Peterson is Associate Professor of Foreign Language Studies at Kyoto University. He has published widely in the field of computer assisted language learning. He is the author of Computer Games and Language Learning (Palgrave) and editor of Digital Games and Language Learning: Theory, Development and Implementation (Bloomsbury). Dr Peterson established and now directs a research lab (https://petersonlab.weebly.com) dedicated to investigating the effective use of digital technologies in foreign language learning. Nasser Jabbari is a Lecturer in Applied Linguistics and Language Teaching at the University of Essex (UK) Department of Language and Linguistics. He received a PhD (in curriculum and instruction, English as a second language [ESL]) from Texas A&M University (USA). His research interests include ‘naturalistic’ and ‘tutorial’ computer assisted language learning (CALL), specifically, language use and learning in social media and online gaming environments. His current research focuses on the psycholinguistic and sociocultural processes underlying second language acquisition (SLA) and second language (L2) socialization in multilingual and multicultural contexts of massively multiplayer online (role-playing) games.