On 1st June, Elena Seoane and Douglas Biber convened the workshop Register Approaches to Language Variation and Change in English(es) within the ICAME 40 conference held in Neuchâtel, Switzerland, from 1 to 6 June. Ten different papers covered a fairly wide range of topics within register variation, with a focus on particular registers (papers by Edward Finegan & Benjamin Lee; Stefania Degaetano-Ortlieb), earlier English (papers by Claudia Lange; Paula Rodríguez-Puente), learner English (Tove Larsson & Magali Paquot), student writing (Randi Reppen), World Englishes (Stella Neumann & Stefan Evert), specific syntactic markers of register (Javier Pérez-Guerra, LVTC coordinator) and on new approaches (papers by Alexandra Engel, Benedikt Szmrecsanyi, Freek Van de Velde & Jason Grafmiller; Doug Biber, Jesse Egbert & Daniel Keller). We are grateful to all participants and attendants for their work and active contribution to the fruitful debate that followed, and to the ICAME 40 organisers for a wonderful conference.