The 2021 EUROCALL conference engaged just under 250 speakers from 40 different countries. Cnam Paris and Sorbonne Université joined forces to host and organise the event despite the challenging context due to the COVID-19 pandemic. Originally programmed to be held on site in the heart of Paris, France, the EUROCALL organising team and executive committee agreed to opt for a blended and then for a fully online conference. The theme of the 2021 EUROCALL conference was "CALL & Professionalisation". This volume, a selection of 54 short papers by some of the EUROCALL 2021 presenters, offers a combination of research studies as well as practical examples fairly representative of the theme of the conference. [This content is provided in the format of an e-book. Individual papers are indexed in ERIC.]