Brazilian Portuguese keeps every vowel that Lisbon whispers away, which makes it sound like a different language at first. t and d hiss before i — 'dia' is 'jia' — a final l is a w, and Rio specifically turns the r of 'rio' and the r at the end of a word into a breath. The ʃ on final s is one of the few things Rio shares with Lisbon.
Où: Brazil — carioca
La porte d’entrée: 'Bom dia, Rio' as bõ d͡ʒia hiu.
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Syllable-timed where Lisbon is stress-timed: every vowel gets its beat, so the language sounds sung. Rio adds a long, lazy rise on stressed syllables and a rising tail on questions.
Ce qui bouge, règle par règle
Dans l’ordre où la bouche les applique. Chaque avant/après est écoutable — cliquez sur l’API. Le motif est la règle telle que le moteur l’exécute, pour les curieux.
Consonnes
t hisses before i
t(?=[iɪ]) → t͡ʃ
Quand: before i, including the i that a final e has just become
Comment: Let the t release into the ch of 'church'.
'Tia' is 'chia', 'noite' is 'noichi'. It is the most Brazilian sound there is, and Lisbon does not have it at all.
Mot
Référence
Accent
tia
noite
gente
d hisses before i
d(?=[iɪ]) → d͡ʒ
Comment: 'Dia' is 'jia' — the j of English 'jeep'.
Mot
Référence
Accent
dia
verde
cidade
l at the end of a syllable is a w
l(?=[pbtdkɡqʔmnɲŋɴfvθðszʃʒɕʂʐçxχɣʁħʕhβʝlʎɹrɾjwɥʈɖɳɽʋɦ]|$| ) → w
Comment: Say 'oo' where the l would be.
Which is why 'Brasil' ends in the sound of 'ow'. Lisbon keeps a dark l.
Mot
Référence
Accent
Brasil
mal
sol
The strong r is a breath
ʁ → h
Comment: Just breathe. No tongue, no throat.
Rio's r is the English h. 'Rio' is 'hee-oo'.
Mot
Référence
Accent
rio
carro
rua
…and so is r at the end of a word
ɾ$ → h
Quand: at the end of a word; very often it drops away entirely
Mot
Référence
Accent
comer
falar
Voyelles
Final unstressed e is a full i
ɨ → i
Comment: Say a full 'ee'. Every syllable is pronounced.
Brazil never reduced this vowel. It is a clear i — and that i then triggers the next rule.
Mot
Référence
Accent
sete
noite
verde
Unstressed a is a full a
ɐ(?![̃]) → a
Lisbon reduces it to a schwa-like ɐ. Brazil says the vowel.