Five tones instead of six, no glottal catch anywhere, v said as y, d and gi said as y, and final n and t drifting back to ng and c. It is softer and more sung than Hanoi's, and it is what most overseas Vietnamese speak. Two limits of working from the site's Hanoi transcription rather than from the spelling: the reference has already merged r into /z/, so the rule that sends /z/ to /j/ catches r-words too, which Saigon actually says with a retroflex or a trill; and Saigon keeps s (retroflex) apart from x, which a rule on a single /s/ cannot show.
Où: Ho Chi Minh City and the Mekong delta
La porte d’entrée: Say 'Việt Nam' as 'Yiệc Nam', with the ệ low and dipping rather than cut off.
Essayez un mot
Tout ce que le moteur d’orthographe sait transcrire, l’accent sait le déplacer. Ralentissez pour entendre la forme.
A wider, more musical pitch range, with the merged hỏi-ngã tone swooping down and up. A little slower, and the final stops less abrupt.
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
v is said as y
v → j
Comment: Do not let the teeth touch the lip; start from the y of 'yes'.
The south never developed a /v/; the letter v is read as the glide /j/. vui 'happy' sounds like 'yui', Việt like 'Yiệt'.
Mot
Référence
Accent
vui
happy
Việt Nam
d and gi are said as y
z → j
Comment: The y of 'yes' again.
What Hanoi says as /z/ for d and gi, the south says as /j/: dạ 'yes' is 'yạ', gì 'what' is 'yì'. The reference has folded r into the same /z/, so r-words come out with /j/ here too; Saigon really says those with a retroflex /ʐ/ or a trill.
Mot
Référence
Accent
dạ
yes (polite)
gì
what
final n drifts to ng
(?<=[aăɤɤ̆ɔou])n(?=[˥˦˧˨˩ˀ]|$| ) → ŋ
Quand: after a back or central vowel, at the end of the syllable
Comment: Let the back of the tongue close instead of the tip.
ăn 'eat' comes out 'ăng', bốn 'four' as 'bống'. After the front vowels (i, ê, e) the n stays.
Mot
Référence
Accent
ăn
to eat
bốn
four
tin
unchanged — front vowel
final t drifts to c
(?<=[aăɤɤ̆ɔou])t(?=[˥˦˧˨˩ˀ]|$| ) → k
Quand: after a back or central vowel, at the end of the syllable
Comment: Close at the back of the mouth, unreleased.
The same shift as n → ng, on the stops: mất 'lose' as 'mấc', một 'one' as 'mộc'.
Mot
Référence
Accent
mất
to lose
một
one
Mélodie
hỏi and ngã become one tone
˧˥ˀ|˧˩˧ → ˨˩˦
Comment: Drop, then rise — with no catch in the throat.
South of Huế the broken-rising ngã and the dipping hỏi fell together into a single low dipping-rising tone. The spelling keeps both marks; southern children learn which words take ã as a list.
Mot
Référence
Accent
mã
horse; code
mả
tomb — now identical to mã
hỏi
to ask
nặng loses its glottal catch
˨˩ˀ → ˨˩˨
Comment: Go low and let the syllable finish on its own.
Southern nặng is low and slightly dipping, and the vowel runs its full length; the Hanoi cut-off is gone.