French → Vietnamese
Vietnamese uses 35 sounds. You already own 20 of them from French. The other 15 are the work — and 13 of those are the dangerous kind: close enough to something you already say that you will substitute them without hearing yourself do it.
The silent swaps
Your mouth has something close enough to reach for. These survive for years precisely because they sound right to you — the fix is hearing the difference first, not trying harder.
the move: close, but not identical
Vietnamese: to eat · written "ă", "a (in ay, au)"
A SHORT a. Written ă on its own, but the a of tay and sáu is this vowel too — which is why tai/tay and sao/sáu are different words.
Your /a/ is the one in chat (cat).
the move: velar → palatal
Vietnamese: hello / goodbye · written "ch", "tr (Hanoi)"
A stop made with the tongue body on the palate; there is no 'sh' after it. Close to Korean ㅈ but tighter and with no hiss. tr merges into it in Hanoi (the south says a retroflex /ʈ/).
Your /k/ is the one in quand (when).
the move: palatal → velar
Vietnamese: delicious · written "ng", "ngh"
English and Korean have this sound only at the end of a syllable (sing, 강); Vietnamese puts it at the start. Say 'sing on', then drop the 'si'. ngh is the same sound before e/ê/i.
Your /ɲ/ is the one in montagne (mountain).
the move: close, but not identical
Vietnamese: three; father · written "b"
Implosive: the larynx drops and air is drawn in as the lips open. A plain English b is understood, but sounds foreign. New for Korean speakers too — Korean ㅂ is neither voiced nor implosive.
Your /b/ is the one in bon (good).
the move: close, but not identical
Vietnamese: to go · written "đ"
The barred đ is the ONLY d-sound in Vietnamese; the unbarred d is /z/ (or /j/ in the south).
Your /d/ is the one in deux (two).
the move: aspirated
Vietnamese: to like · written "th"
th is an aspirated t — never English th. thích rhymes with English 'tick', and th is exactly Korean ㅌ against the plain t of ㄸ; a Korean speaker hears this pair without trying.
Your /t/ is the one in table (table).
the move: unrounded
Vietnamese: letter · written "ư"
Say /u/, then unround the lips and keep the tongue where it was. The horn on the letter means 'unrounded'. This is Korean ㅡ (eu), exactly — a Korean speaker owns it already.
Your /u/ is the one in jour (day).
the move: unrounded
Vietnamese: cooked rice; a meal · written "ơ"
Say /o/ and unround the lips — the same horn, same instruction. Close to Korean ㅓ (eo), and to American 'bird' with the r taken out.
Your /o/ is the one in eau (water).
the move: unrounded
Vietnamese: to weigh; a kilo · written "â"
A SHORT ơ: cân is clipped, cơn is held. The vowel of American 'cut', or a short Korean ㅓ.
Your /o/ is the one in eau (water).
the move: uvular → velar
Vietnamese: chicken · written "g", "gh"
A voiced fricative, like Spanish g between vowels — softer than English g. gh before e/ê/i.
Your /ʁ/ is the one in rue (street).
the move: plosive → fricative
Vietnamese: no; not; zero · written "kh"
German ach, Spanish j — or Korean ㅎ in front of ㅡ (흐), which comes close. không is the word you will say most.
Your /k/ is the one in quand (when).
the move: it glides, yours would hold still
Vietnamese: money · written "ia", "iê", "ya", "yê"
One diphthong, spelled ia when nothing follows (kia) and iê when a consonant does (tiền).
Your /i/ is the one in lit (bed).
Words you may say identically
Two or more Vietnamese sounds landing on one sound of yours. Until the ear separates them, the mouth cannot — which is what the ear trainer is for.
Genuinely new
Nothing in French sits close to these. They sound foreign in your mouth — which is the good news: you can hear that you are not saying them yet.
Rhythm and pitch
The layer spelling never records, and the one that makes a correct sentence still sound foreign.
| French | Vietnamese | |
|---|---|---|
| Rhythm | Syllable-timed | Syllable-timed, one tone per syllable |
| Stress | This is the one that surprises everyone: French words have NO fixed stress. Prominence lands on the last syllable of the rhythmic GROUP, not of the word — so the same word is stressed differently depending on where it sits. 'Un chocolat' stresses -lat; 'un chocolat chaud' moves it to chaud and the word chocolat loses it entirely. There are no French minimal pairs by stress, because there is nothing to contrast. | No lexical stress. Every syllable carries its own tone and its own full vowel, and none is reduced. What sounds like stress to an English ear is a syllable holding its tone longer or louder for emphasis, and grammatical words (đã, sẽ, được) being said lighter and faster than content words. |
| Pitch | Intonation only, at the level of the phrase. A yes/no question can be marked by a final rise alone (Tu viens ?), which is why the rise matters more in French than the est-ce que you were taught. | lexical tone — pitch changes the word |
What you have that Vietnamese doesn't
16 sounds with no job in Vietnamese. They are not mistakes — but they are where an accent leaks in, because a sound you own is easy to use when a hard one is due.
The honest caveat
This is a prediction from the shape of two sound systems, not a recording of you. It says what your inventory makes likely — it cannot know that your French has a regional variety that already owns one of these, or that you learned Vietnamese from someone whose accent you copied. A teacher listening to you beats it. Use it to know what to listen for.
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