Register variation by Spanish users of English: The Nijmegen Corpus of Spanish English

English serves as a in situations with varying degrees of formality. How formality affects non-native speech has rarely been studied. We investigated register variation by Spanish users of English by comparing formal and informal speech from the Nijmegen Corpus of Spanish English that we created. This corpus comprises speech from 34 Spanish speakers of English in interaction with Dutch confederates in two speech situations. Formality affected the amount of laughter and overlapping speech and the number of Spanish words. Moreover, formal speech had a more informational character than informal speech. We discuss how our findings relate to register variation in Spanish.