Southeast Asia · Latin (diacritics)
Vietnamese Multilingual Speech Dataset
Vietnamese multilingual speech sourced to your specification — no inventory, no fixed listing. This page covers what is specifically hard about this pairing, and which fields your specification needs to pin down.
Why multilingual speech in Vietnamese is its own problem
The dimension most often overlooked for Vietnamese in a multilingual project is dialect — northern and southern accents realize tones so differently that they can be treated as two separate acoustic systems. Give Vietnamese a single label in the project and the model learns contradictory tone cues.
The field to pin down first: Vietnamese has to be split into sub-labels by dialect region, with the sample size for each region stated.
At a glance
| Language | Vietnamese |
|---|---|
| Primary region | Southeast Asia |
| Writing system | Latin (diacritics) |
| Category | Multilingual Speech |
| Specification field to settle first | Vietnamese has to be split into sub-labels by dialect region, with the sample size for each region stated. |
| Delivery | Sourced to order, pilot batch before the full run |
What multilingual speech data is
Speech data covering multiple languages within one project, used for multilingual ASR, cross-lingual transfer, and language identification.
What buyers get wrong about it
The biggest risk in a multilingual project is uneven quality — annotation teams for different languages work to different standards, and once merged they drag each other down.
The specification field that decides the quote
Speaker count, hours, and recording conditions must be listed per language; a combined total does not cut it.
The language side: what Vietnamese demands
Vietnamese has six tones, marked in writing by a heavy load of diacritics. The three major dialect regions — north, central, and south — realize tones quite differently, and mixing them in one batch gives the acoustic model contradictory tone cues.
What we can put in this delivery
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Read and conversational speech
Scripted recording for TTS, and unscripted conversation for recognition. Specified separately because they need different speaker pools.
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Transcription to your convention
Orthographic or phonetic, with the guideline written before production and shared with you for review.
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Speaker metadata
Age band, gender, region and dialect background per file, so you can slice the dataset rather than take it whole.
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Consent documentation
Signed speaker consent covering the intended use, plus collection methodology and the annotation guideline.
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Pilot batch
A small batch first, which you can reject. Misalignments surface after a few hours rather than at delivery.
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Delivery in your format
Audio format, sampling rate, segmentation length and metadata schema set to your pipeline's requirements.
What arrives in a delivery
| Component | What it is |
|---|---|
| Audio files | Format, sampling rate and segmentation length set to your pipeline. Named to a convention you specify. |
| Transcription | Orthographic or phonetic, produced under a guideline you review before production starts. |
| Speaker metadata | Age band, gender, region and dialect background per file, plus a speaker identifier so the dataset can be sliced. |
| Recording conditions | Environment, device and, where relevant, measured signal-to-noise ratio per file. |
| Annotation guideline | The document the annotators worked from, so you can reproduce the conventions on your own data. |
| Consent records | Signed speaker consent covering your intended use, with the transfer mechanism addressed where required. |
| Collection methodology | How speakers were recruited, screened and scheduled — the part that tells you how biased the pool is. |
| Quality report | Pilot outcome, re-work log, and the annotator agreement figures where the task supports measuring them. |
Questions we get about Vietnamese Multilingual Speech
How many distinct speakers can you provide for Vietnamese Multilingual Speech?
It depends on the specification and the timeline, and we will give a real number rather than a target. For this pairing, speaker recruitment is usually the step that sets the schedule. Vietnamese has to be split into sub-labels by dialect region, with the sample size for each region stated.
Can you annotate to our own guideline instead of the default?
Yes, and for this pairing we would recommend it. The dimension most often overlooked for Vietnamese in a multilingual project is dialect — northern and southern accents realize tones so differently that they can be treated as two separate acoustic systems. That is exactly the kind of decision a default guideline leaves open, and it is where annotators diverge. Send us your guideline, or we will draft one and you can review it before production starts.
Do you offer a sample before we commit to a full run?
Yes. Select a free sample in the request form and describe what you need. A pilot batch is the cheapest way to establish whether the quality bar is reachable for Vietnamese Multilingual Speech before committing to the full volume.
Is the data licensed or owned outright?
Licensing terms are set per project, so tell us how the model will be used and whether it will be distributed. Consent documentation travels with the data either way, and we do not handle medical or clinical data or recorded telephone calls.
Other datasets in Vietnamese
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Vietnamese Short Video Speech
Speech in the talking-head style of short video — fast, emotionally strong, colloquial — used for short video subtitles and content understanding.
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Vietnamese Live Stream Speech
Long-session spoken content from live streams — host monologue and responses to audience interaction — fast-paced and heavily improvised.
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Vietnamese Voice Assistant
Command and dialogue data for voice assistants, usually with intent annotation, covering the full chain from wake word to understanding to response.
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Vietnamese Elderly Voice
Speech data from elderly speakers, usually stratified by age band and health status, used for voice products built for older users.
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Vietnamese Accented English
English speech from non-native speakers or specific regional accents, grouped by accent origin, used to improve accent robustness in ASR.
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Vietnamese Speech Translation
Parallel data pairing source-language audio with target-language translation, used for speech-to-text and speech-to-speech translation models.
Multilingual Speech in other languages
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Ukrainian Multilingual Speech
Europe
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Swahili Multilingual Speech
Sub-Saharan Africa
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Kurdish Multilingual Speech
Middle East & North Africa
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Hausa Multilingual Speech
Sub-Saharan Africa
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Uzbek Multilingual Speech
Central Asia & Caucasus
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Hindi Multilingual Speech
South Asia
Request Vietnamese Multilingual Speech
Tell us the language, the hours, and what the data needs to look like. You will get a real number and a real timeline — not a range. If we cannot source it well, we will tell you that instead.
- Pilot batch before the full run, so problems surface early.
- Consent documentation delivered with the data.
- No medical or clinical data. No recorded telephone calls.