English → Vietnamese
Vietnamese uses 35 sounds. You already own 15 of them from English. The other 20 are the work — and 18 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: 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 cat (cat).
the move: velar → palatal
Vietnamese: house · written "nh"
Spanish ñ. Also a final: anh, bánh.
Your /ŋ/ is the one in sing (sing).
the move: near-close → close
Vietnamese: to go · written "i", "y"
i and y are the same vowel; the spelling choice is convention (Mỹ, kỹ).
Your /ɪ/ is the one in sit (sit).
the move: near-open → open
Vietnamese: three; father · written "a"
Long and open. Before -nh and -ch it is said shorter and fronter (anh, sách).
Your /æ/ is the one in cat (cat).
the move: near-open → open
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 /æ/ is the one in cat (cat).
the move: near-close → close
Vietnamese: autumn; to collect · written "u"
Your /ʊ/ is the one in book (book).
the move: near-close → close
Vietnamese: money · written "ia", "iê", "ya", "yê"
One diphthong, spelled ia when nothing follows (kia) and iê when a consonant does (tiền).
Your /ɪə/ is the one in near (near).
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 bed (bed).
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 dog (dog).
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 tea (tea).
the move: close, but not identical
Vietnamese: to give; for · written "o"
Open o — the vowel of 'law' for an American who keeps caught apart from cot, shorter. Korean has nothing between ㅗ and ㅓ; this sits between them.
Your /ɔː/ is the one in law (law).
the move: near-close → close-mid
Vietnamese: night · written "ê"
Closed e — French é, Korean ㅔ, the vowel of American 'say' without the glide. The hat makes it closed.
Your /ɪ/ is the one in sit (sit).
the move: near-close → close-mid
Vietnamese: aunt; Miss; female teacher · written "ô"
Closed o — French eau, Korean ㅗ, the vowel of American 'go' without the glide. The hat makes it closed.
Your /ʊ/ is the one in book (book).
the move: open-mid → close-mid
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 /ʌ/ is the one in cup (cup).
the move: open-mid → close-mid
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 /ʌ/ is the one in cup (cup).
the move: near-close → close, 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 /ʊ/ is the one in book (book).
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 cat (cat).
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.
- c = k = x → your k vs vs train this pair →
- ɯ = u = o → your ʊ vs vs train this pair →
- t = tʰ → your t vs
- ɲ = ŋ → your ŋ vs
- i = e → your ɪ vs
- ɤ = ɤ̆ → your ʌ vs train this pair →
- a = ă → your æ vs train this pair →
Genuinely new
Nothing in English 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.
to buy
ua when final (mua), uô before a consonant (muốn). After q the u belongs to the consonant: qua is /kwa/.
Closest thing you own: — but it glides, yours would hold still, near-close → close.
rain
ưa when final (mưa), ươ before a consonant (nước, người).
Closest thing you own: — but near-close → close, front → back.
Rhythm and pitch
The layer spelling never records, and the one that makes a correct sentence still sound foreign.
| English | Vietnamese | |
|---|---|---|
| Rhythm | Stress-timed | Syllable-timed, one tone per syllable |
| Stress | Contrastive, and unmarked in writing — the single most common cause of not being understood. Dozens of noun/verb pairs differ only in where the stress goes, and every unstressed vowel collapses to /ə/. | 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 | No lexical tone, but intonation carries an enormous amount: rise for yes/no questions, fall for statements and wh-questions, and a whole grammar of contrast ('I didn't say SHE took it'). | lexical tone — pitch changes the word |
What you have that Vietnamese doesn't
28 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 English 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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