Did our Ancestors code-switch? An investigation of code-switching in a medieval Catalan chronicle, the Book of deeds of King James, in which Catalan alternates with Latin, Arabic Mozarabic, Aragonese, Castilian, Occitan French and Italian. He questions approaches to the study of code-switching which focus on composition and downplay the role of cultural and social content. By Joan A. Argenter, University of Barcelona.