|96,000 (2000 census)|
Vowels are /a e i o u/. Stress falls on penultimate syllable, with sequence of like vowels counting as one syllable. Consonants are:
/dʒ/ occurs in loans. /h/, /s/, /ʔ/ are found in loans and a small number of native words, such as /buahaŋa/ 'k.o. cricket', /sio/ 'nine', /naʔal/ 'bark slippers'.
/β/ only occurs before /u/, but there are near-minimal pairs such as /βuŋo/ 'fruit', /buŋol/ 'leaf'.
/ʎ/ is pronounced [l] after a front vowel, as in [dila] 'tongue';  if not, but preceded by a front vowel, as in [ae] 'chin'; and [ʎ] elsewhere. However, there is an exception with the sequences /ʎaʎa, ʎoʎa, ʎoʎo/, where the first /ʎ/ is pronounced [l], as in /ʎoʎo/ [loʎo] 'face'.
- "Buol" in K. Alexander Adelaar & Nikolaus Himmelmann, 2005, The Austronesian languages of Asia and Madagascar