In a new article based on fieldwork data collected in 2019 in Idiofa (DRC) as part of the BantuFirst project, Sara Pacchiarotti, Lorenzo Maselli & Koen Bostoen offer in a new article published in the open access journal Papers in Historical Phonology a phonetic and phonological documentation of two phonemic ‘interior’ vowels and heterosyllabic vowel sequences as well as a historical account of their development in the West-Coastal Bantu language Ngwi. The article is available here.