“…Compared to this, less research has been done in phonological domains, most likely given that positive effects of early exposure have been attested on heritage language pronunciation (Au, Knightly, Jun & Oh, 2002;Knightly, Jun, Oh & Au, 2003). Nevertheless, recent studies on heritage language phonology discuss the existence of a "heritage accent" (Au, Oh, Knightly, Jun & Romo, 2008;Lloyd-Smith, Einfeldt & Kupisch, 2020;Stangen, Kupisch, Proietti Ergün & Zielke, 2015) and found deviations from monolingual norms at both segmental (Amengual, 2012(Amengual, , 2016Elias, McKinnon & Milla-Muñoz, 2017;Godson, 2004;Kissling, 2018;Ronquest, 2013;Willis, 2005) and suprasegmental levels (Chang, Yao, Haynes & Rhodes, 2011;Colantoni, Cuza & Mazzaro, 2016;Henriksen, 2016;Kim, 2019;Kim, 2020). For instance, Au et al (2008) found that Spanish heritage speakers, regardless of whether they regularly used Spanish during childhood, sounded more native-like than late L2 learners, but when compared with non-heritage native speakers, their speech was perceived to have a stronger foreign accent.…”