“…For example, research examining the linguistic knowledge of heritage speakers in relation to late L2 learners is helping to inform language course design so as to better serve the unique needs of heritage language learners. Studies of third language (L3) learners are investigating what factors influence speech learning in multilingual situations (Gallardo del Puerto, 2007), how L3 learning resembles and differs from L2 learning (Onishi, 2013;Wrembel, 2014), and how L3 learning may influence the phonological representations and processes associated with previously learned languages (Cabrelli Amaro, 2017), in line with the multicompetence view of language development over the lifespan (Cook, 1991(Cook, , 1992(Cook, , 2003. Finally, it would be remiss not to mention the work of scholars who are connecting L2 speech research to L2 instructional practices and strategies (see, e.g., Mora and Levkina, 2017).…”