In today’s society, multilingualism has become the standard, and research has consistently shown that it brings numerous benefits in cognitive, affective and social domains (Fürst & Grin, 2021; Monnier et al., 2021; Tiurikova et al., 2021). Multilingualism encompasses the dynamic and integrated knowledge and use of multiple languages or language varieties (Haukås et al., 2021), different levels of language proficiency, receptive and productive skills (Council of Europe, 2001), multilingual identities (Forbes et al., 2021; Rutgers et al., 2021), which depend on such factors as age, educational background, and socioeconomic status. The “multilingual turn” in education, advocated by May (2019), presents challenges for teachers who lack training in teaching in linguistically and culturally diverse classrooms (De Angelis, 2011; Otwinowska, 2014). Several researchers (De Angelis, 2011; García & Kleyn, 2016; Lundberg, 2019) have recommended prioritizing multilingualism in teacher education and ongoing professional development.