Fon language

Vowels

Fon has seven oral vowel phonemes and five nasal vowel phonemes.

Consonants

/p/ occurs only in linguistic mimesis and loanwords but is often replaced by /f/ in the latter, as in cɔ́fù 'shop'. Several of the voiced occlusives occur only before oral vowels, and the homorganic nasal stops occur only before nasal vowels, which indicates that [b] [m] and [ɖ] [n] are allophones. [ɲ] is in free variation with [j̃] and so Fong can be argued to have no phonemic nasal consonants, a pattern rather common in West Africa.^[a] /w/ is nasalized (to [ŋʷ]) before nasal vowels, and may assimilate to [ɥ] before /i/. /l/ is sometimes also nasalized.^{[clarification needed]}

The only consonant clusters in Fon have /l/ or /j/ as the second consonant. After (post)alveolars, /l/ is optionally realized as [ɾ]: klɔ́ 'to wash', wlí 'to catch', jlò [d͡ʒlò] ~ [d͡ʒɾò] 'to want'.

Tone

Fon has two phonemic tones: high and low. High is realized as rising (low–high) after a voiced consonant. Basic disyllabic words have all four possibilities: high–high, high–low, low–high, and low–low.

In longer phonological words, such as verb and noun phrases, a high tone tends to persist until the final syllable, which, if it has a phonemic low tone, becomes falling (high–low). Low tones disappear between high tones, but their effect remains as a downstep. Rising tones (low–high) simplify to high after high (without triggering downstep) and to low before high.

In Ouidah, a rising or falling tone is realized as a mid tone. For example, mǐ 'we, you', phonemically high-tone /bĩ́/ but phonetically rising because of the voiced consonant, is generally mid-tone [mĩ̄] in Ouidah.

Roman alphabet

The Fon alphabet is based on the Latin alphabet, with the addition of the letters Ɖ/ɖ, Ɛ/ɛ, and Ɔ/ɔ, and the digraphs gb, hw, kp, ny, and xw.^[6]

Gbékoun script

Speakers in Benin also use a distinct script called Gbékoun that was invented by Togbédji Adigbè.^[8][9] It has 24 consonants and 9 vowels, as it is intended to transcribe all the languages of Benin.