Khoekhoe language
Oral vowel lines in CVV are /ii ee aa oo uu ai [əi] ae ao au [əu] oa oe ui/. Due to the reduced number of nasal vowels, nasal lines are /ĩĩ ãã ũũ ãĩ [ə̃ĩ] ãũ [ə̃ũ] õã ũĩ/. Lines ending in a high vowel (/ii uu ai au ui ĩĩ ũũ ãĩ ãũ ũĩ/) are said quicker than others (/ee aa oo ae ao oa oe ãã õã/), more like diphthongs and long vowels than like vowel sequences in hiatus. The tones are contours. CVCV words usually have the same vowel sequences, but there are many exceptions. The two tones are also more different.