“…For example, the Kinyarwanda word umuntu is a noun of class 1, meaning 'man', and abantu is its plural, which is a class 2 noun. Noun classes in Bantu have been studied extensively from a historical and typological perspective (Güldemann and Fiedler, 2021;Hyman, Lionnet, and Ngolele, 2019;Katamba, 2003;Wal, 2015), but very few studies have addressed the question how Bantu nouns are represented in the mental lexicon (Ciaccio, Kgolo, and Clahsen, 2020;Kgolo and Eisenbeiss, 2015). Yet, the highly inflectional nature of Bantu languages (Nurse and Philippson, 2006) can shed light on an important theoretical question concerning the mental lexicon: are the cognitive units in the mental lexicon words (Baayen, Chuang, and Blevins, 2018;Baayen, Chuang, Shafaei-Bajestan, and Blevins, 2019;Blevins, 2006;Blevins, 2016a) or morphemes (Ciaccio, Kgolo, and Clahsen, 2020;Goldsmith and Mpiranya, 2018;Kgolo and Eisenbeiss, 2015)?…”