The successful acquisition of a heritage language (HL) has been the focus of much of the research on early bi-, tri- and multilingualism in the last years, since it is this language which is generally delimited within the family environment and finds less continuity outside this context once the multilingual child starts socialising in the…

Literature on early language acquisition has observed that age of onset of acquisition (AoA) is relevant for certain grammatical phenomena. Simultaneous bilinguals receive regular and extensive exposure to two languages from birth (Müller, 2009), whereas sequential child learners get in extensive contact to L[subscript B] once the L[subscript A]…