German → Vietnamese
Vietnamese uses 35 sounds. You already own 17 of them from German. The other 18 are the work — and 15 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 Mann (man).
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 Kind (child).
the move: velar → palatal
Vietnamese: house · written "nh"
Spanish ñ. Also a final: anh, bánh.
Your /ŋ/ is the one in singen (to 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 Kind (child).
the move: near-close → close
Vietnamese: autumn; to collect · written "u"
Your /ʊ/ is the one in Mutter (mother).
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 Buch (book).
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 danke (thanks).
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 Tag (day).
the move: close, but not identical
Vietnamese: night · written "ê"
Closed e — French é, Korean ㅔ, the vowel of American 'say' without the glide. The hat makes it closed.
Your /eː/ is the one in See (lake).
the move: close, but not identical
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 /oː/ is the one in Brot (bread).
the move: voiced
Vietnamese: chicken · written "g", "gh"
A voiced fricative, like Spanish g between vowels — softer than English g. gh before e/ê/i.
Your /x/ is the one in Bach (stream).
the move: close, but not identical
Vietnamese: star; why · written "o-, u- (before a vowel)", "qu-", "-o, -u (after a vowel)"
Both an on-glide (hoa, quê) and an off-glide (sao, đâu).
Your /j/ is the one in ja (yes).
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 Mutter (mother).
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 /oː/ is the one in Brot (bread).
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 German 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.
money
One diphthong, spelled ia when nothing follows (kia) and iê when a consonant does (tiền).
Closest thing you own: — but it glides, yours would hold still, near-close → close.
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 it glides, yours would hold still, near-close → close, unrounded.
Rhythm and pitch
The layer spelling never records, and the one that makes a correct sentence still sound foreign.
| German | Vietnamese | |
|---|---|---|
| Rhythm | Stress-timed | Syllable-timed, one tone per syllable |
| Stress | Contrastive in a very German way: with separable-vs-inseparable prefix verbs, the stress tells you which grammar you are in — and therefore what the sentence means. Otherwise stress sits on the stem syllable, and the unstressed prefixes (be-, ge-, er-, ver-, zer-, ent-) never take it. | 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. Intonation marks questions, but German also inverts the verb, so the rise is doing less work than in Georgian or French. | lexical tone — pitch changes the word |
What you have that Vietnamese doesn't
26 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 German 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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