“…Over half of the world’s population is functionally bilingual ( Grosjean, 2010 , Wolck, 1988 ). Yet, monolingual language development is still considered the norm in various fields of research (i.e., monolingual bias; Barratt, 2018 ; Bhatia, 2017 ; De Houwer, 2023 ; Grosjean, 2008 ). In fact, understanding the development of the bilingual brain is an important topic in developmental neuroscience research ( Byers-Heinlein et al, 2019 , Claussenius-Kalman et al, 2021 , Kroll and Fricke, 2014 , Li, 2015 , Petitto, 2009 ).…”