David Lasagabaster is Full Professor of Applied Linguistics at the University of the Basque Country (UPV/EHU). He is “Extraordinary Professor” in the Department of Curriculum Studies at the Faculty of Education (Stellenbosch University, South Africa), an appointment aimed at giving recognition to individuals for their proven specialised expertise in their profession and field of study. His research revolves around EMI (English-Medium Instruction), CLIL (Content and Language Integrated Learning), attitudes and motivation, second/third language acquisition, and multilingualism. He has published widely in international journals (Applied Linguistics, Language Teaching, International Journal of Bilingual Education and Bilingualism, The Modern Language Journal, Studies in Higher Education, Language Teaching Research, Language and Education, TESOL Quarterly, International Review of Applied Linguistics (IRAL), Journal of Multilingual and Multicultural Development, System, Language Policy, etc.), books and edited books. He has been included in the Stanford list of the world’s top-2% most-cited researchers since 2020.