“…The field of Second Language pedagogy is witnessing an increasing interest in young learners' development in second language (Mackey, 1994;Mackey & Oliver, 2002;Mackey & Silver, 2005;Oliver, 1998;Oliver, Philp & Duchesne, 2017;Roehr-Brackin & Tellier, 2019) and, more scarcely, in foreign language (Azkarai & Kopinska, 2020;Coyle & Roca de Larios, 2014;García Mayo & Hidalgo, 2017;García Mayo & Imaz Aguirre, 2019;García Mayo & Lázaro-Ibarrola, 2015;Pinter, 2006Pinter, , 2007Pladevall-Ballester & Vraciu, 2020) contexts. Particularly, there has been a growing interest in the potential contribution that collaborative writing makes in fostering learners' reflection on language form (López-Serrano, Roca de Larios & Manchón, 2019).…”