Khwe has 70 phonemic
consonants, including 36
clicks, as well as 25 vowel phonemes, including diphthongs and nasalised vowels. Khwe's tone system has been analysed as containing 9 syllabic tones (3 register and 6 contour), although more recent proposed analyses identify only 3 lexical tones, high, mid and low, with the
mora as the basic unit of phonological structure. Tone sandhi processes are common in Khwe and related languages.
Vowels • /o/ is realized as [o] when lengthened, but is realized as [ɔ] if it is pronounced short. • Three nasal vowels are recognized as /ã ĩ ũ/. A nasal /õ/ also exists, but only in diphthongs as /õã/. • Nasal diphthongs include /ãĩ, ũĩ, ãũ, õã/. • /oɛ/ and /uɛ/ are free in variation with /oe/ and /ue/, but only dependent upon speakers.
Consonants • /ʃ/ is realized as [ç] in Buma-Khwe, but as [s] in ǁXo-Khwe and Buga-Khwe, and as [ʃ] in ǁXom-Khwe. • /l/ is only found in borrowings.
Clicks Khoe click inventories generally combine four anterior constrictions types with nine to eleven anterior constrictions. The exact size of the click inventory in Khwe is unclear. Köhler established an inventory of 36 click phonemes, from combinations of four influxes /ǀ ǂ ǃ ǁ/, and nine effluxes (only five on the alveolar), as well as a borrowed
voiced alveolar click, /ǃᶢ/. Khwe is the only language to have a pre-nasalized voiced click.
Tones There are three tones in Khwe: high /V́/, mid /V̄/, low /V̀/. Long vowels and diphthongs have eight tones (missing only *mid–low as a combination). == Orthography ==