This feature asks how many distinctions of vowel height (or aperture) are made in a language. The most typical vowel system has five vowels and three degrees of height (i, e, a, o, u), but systems with four degrees (i, e, ɛ, a, ɔ, o, u) are not uncommon either, and even five degrees (i, ɪ, e, ɛ, a, ɔ, o, ʊ, u) are possible.
|Two vowel heights||3|
|Three vowel heights||31|
|Four vowel heights||36|
|Five vowel heights||6|
|Id||Primary text||Analyzed text||Gloss||Translation||Type||Language||Audio||Details|