The tilde (vowel nasalization mark) is written below the vowel letter (a̰, ɛ̰, ḭ, ɔ̰, ṵ). Kuo has 4 tones, written using tone accent (except for mid tone is unwritten): grave (`) for low tone, acute (´) for high tone, and caron (ˇ) for rising tone.[3]
References
↑Binam Bikoi, Charles, ed. (2012). Atlas linguistique du Cameroun (ALCAM)[Linguistic Atlas of Cameroon]. Atlas linguistique de l'Afrique centrale (ALAC) (in French). Vol.1: Inventaire des langues. Yaoundé: CERDOTOLA. ISBN9789956796069.