Taruven: Phonology: Vowel Quality Inventories: Average (5-6)

6 short vowels

i y ʉ u
e
ɑ

6 long vowels

i:y: ʉ: u:
e:
ɑ:

25 attested diphthongs (grave = falling, acute = rising)

aà aá aì aò aó aỳ eà eá eì eò eỳ ià iá oá oé oì oò uá uì uí yá yè yé yó yú

Geminated consonants can also act as syllable nuclei.

WALS counts this as 6 vowel qualities