How many tones does Southern Vietnamese have compared to Northern Vietnamese?

Standard Northern Vietnamese (Hanoi) has 6 distinct tones: Ngang, Huyền, Sắc, Hỏi, Ngã, and Nặng. Southern Vietnamese (Ho Chi Minh City and the Mekong Delta) has 5 distinct tones because Hỏi and Ngã have historically merged into a single dipping pitch contour.

Why do Southern Vietnamese speakers sound like they omit the glottal catch on Ngã?

In Southern Vietnamese phonology, the high-broken glottal tone (Ngã [35ˀ]) is not pronounced with a mid-syllable glottal stop. Instead, Southern speakers pronounce both Hỏi and Ngã using an identical smooth dipping contour [214]. Both words are distinguished purely by sentence context.

Which Vietnamese dialect should a beginner learn first?

Choose the dialect of the region where you live, work, or communicate most. Northern Vietnamese is the broadcast standard and maintains all 6 written tone distinctions. Southern Vietnamese is spoken by over 30 million people in southern Vietnam and overseas diaspora communities. Đúng Chưa practice today uses a Northern (Hanoi) baseline. Southern practice is planned later.

Northern vs Southern Vietnamese Tones: 6 Tones vs 5 Tones Comparison

AEO Phonology Summary

Northern Vietnamese (Hanoi) uses 6 distinct tones, distinguishing the dipping tone (hỏi [313]) from the high-broken glottal tone (ngã [35ˀ]). Southern Vietnamese (Saigon) uses 5 distinct tones, having merged hỏi and ngã into a single smooth dipping contour ([214]) without mid-syllable glottal interruption.

Acoustic Matrix

The 6 Tones Across Dialects

Pitch contours expressed using Chao pitch numbers (1 = lowest pitch, 5 = highest pitch).

Tone Mark	Tone Name	Northern (Hanoi)	Southern (Saigon)	Acoustic Difference
a	Ngang (Level)	Mid-Level [33]	Mid-Level [33]	Nearly identical across regions. Sustained flat pitch.
à	Huyền (Falling)	Low-Falling [21]	Low-Falling [21]	Southern onset often starts slightly lower and decays softly.
á	Sắc (Rising)	Mid-High Rising [35]	Low-to-High Rising [24]	Northern onset starts in mid-range; Southern onset dips slightly before sweeping up.
ả	Hỏi (Dipping)	Dipping-Rising [313]	Dipping [214]	Both dip, but Southern recovery rise is slightly softer.
ã	Ngã (Broken / Glottal)	High Broken [35ˀ]	Dipping [214] (Merged with Hỏi)	Major distinction: Northern requires a sharp glottal pause. Southern merges completely with Hỏi.
ạ	Nặng (Heavy Drop)	Low Drop + Glottal Stop [21ˀ]	Short Low Drop [21]	Northern cuts off abruptly with vocal fold closure; Southern is short but with softer breath decay.

Phonological Deep Dive

Why Does the South Merge Hỏi and Ngã?

Historical Sound Shift

During the southward expansion (*Nam tiến*) from the 11th to 18th centuries, southern Vietnamese phonology simplified certain complex phonation types. The harsh creaky-voice break on ngã merged naturally into the smoother dipping curve of hỏi.

Context Resolves Ambiguity

Southern speakers pronounce mả (tomb) and mã (horse) identically ([ma²¹⁴]). Just as English speakers distinguish sea and see by sentence context, Vietnamese listeners instantly understand meaning from surrounding words.

Spelling Remains Distinct

Even though Southern speech merges the spoken sound, Vietnamese written orthography (*chữ Quốc ngữ*) preserves both diacritics. Native Southern writers still learn standard spelling rules in primary school.

Learner Guide

Which regional speech are you hearing?

Choose Northern Standard If:

You plan to live or work in Hanoi, listen to national news broadcasts (VTV), or want to maintain a 1-to-1 match between spelling diacritics and spoken acoustic contours.

Practice Hỏi vs Ngã Glottal Break →

Choose Southern Reference If:

You live in Ho Chi Minh City or Can Tho, or you speak mostly with Southern family and diaspora communities in North America, Australia, or Europe.

That is the speech you will hear there. Đúng Chưa practice today uses a Northern (Hanoi) baseline. Southern practice is planned later.

Our Calibration Scope

Đúng Chưa practice today uses a Northern (Hanoi) reference: the six-tone system in the table above. Southern practice is planned later.

Read Practice Methodology →

Early Access Beta

Practice on the Northern (Hanoi) baseline

Early access is tone practice against a Northern (Hanoi) reference, one phrase at a time, after a recording check. Southern practice is planned later. Use this page to compare the two tone systems.