The Sango orthography is as follows:
"e" is used for both [e] and [ɛ], and "o" is used for both [o] and [ɔ]. Certain words have dialectal variations, often influenced by a speaker's mother tongue. Thus "h" is sometimes aspirated, sometimes not; "r" is sometimes realized as "l" and vice-versa; "nz" is pronounced [nz] by some and [ndʒ] by others; "z" is pronounced [z], [ʒ] and [dʒ].
The nasalisation of vowels is written as vowel + "n", but whether certain vowels are nasalised depends on individual speaker preference.
High tone is marked with a circumflex over the vowel (ex. fû kâsa "serve up a sauce"). Mid tone is noted with diareses (ex. fü bongo "sew clothes"). The absence of diacritics indicates low tone.