Khoekhoe language
Khoekhoe uses 5 vowel qualities, seen as oral (sounds produced with the help of the mouth) /i e a o u/ and nasal  /ĩ ã ũ/. /u/ is strongly rounded, /o/ only softly. /a/ is the only vowel with a good amount of allophony; it is pronounced [ə] before /i/ or /u/.