"This special issue is a compilation of studies presented at the workshop Issues on Second Language Processing held in Barcelona in June 2015. The workshop was sponsored by the journal Language Learning and organized by the Center on Cognition Brain and Language (CBC) at the Universitat Pompeu Fabra (Barcelona, Spain)."

ALBERT COSTA is an ICREA Research Professor at the Center for Brain and Cognition at the Universitat Pompeu Fabra (Barcelona, Spain). His research focuses on the cognitive and neural underpinnings of language processing, particularly, on how two languages are represented and processed by the one brain.

CRISTINA BAUS is a researcher at the Center for Brain and Cognition at the Universitat Pompeu Fabra (Barcelona, Spain). Her main research interests focus on the study of the neurobiological substrates of language production, bilingualism, and sign language.