Facts : 1 Vowel prosody system Complex interaction between a vertical vowel system and vowel harmony, known as a vowel prosody system, appears in many of the Central Chadic languages
Facts : 2 One of the best known cases is Margi, but the phenomenon has been documented in more than thirty languages of the group altogether, including all or most languages of five geographically adjacent subgroups: Daba group: Buwal, Daba, Mbudum, Mina Hurza group: Mbuko, Vame Musgum group: Mbara, Muskum Mafa group: Cuvok, Mafa Mofu group: Dugwor, Gemzek, Mada, Merey, Mofu-Gudur, Moloko, Muyang, Ouldeme, Zulgo Further examples of the system of the appear in e.g
Facts : 3 A typical feature for these languages is that vowel frontness or roundedness cannot be considered a segmental feature but is instead a suprasegmental feature, spanning an entire morpheme or phonological word
Facts : 4 All languages allow frontness as a prosody and therefore contrast minimal pairs such as [dam] vs
Facts : 5 [dem]; only some allow roundedness as a prosody, and in others, rounded vowels are found only next to labialized velar consonants
