“…Learners of a foreign language may fail to communicate effectively with L1 NSs because of their foreign accent, intelligibility problems, or misproduction of certain segmental or prosodic elements (e.g., Abu Guba et al, 2021;Al-Mahmoud, 2005, 2020Huneety et al, 2020;Mahmoodi & Zekrati, 2016;Sao Bui, 2016). These problems have several causes, including critical period effects (e.g., Hartshorne et al, 2018), non-biological factors (such as length of residence and exposure to L2) (Flege & Liu, 2001), and the relationship between speech sounds production and perception of L2 (e.g., Huneety et al, 2020;Yeon, 2003).…”