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Release Date: 9/17/2026
Format: MP3
Size: 462.06 MB
A collection of read speech recordings in Vietnamese (Việt).
Restrictions/Special Constraints
None provided.
Forbidden Usage
It is forbidden to attempt to determine the identity of speakers in the Common Voice datasets. It is forbidden to re-host or re-share this dataset.
Intended Use
This dataset is intended to be used for training and evaluating automatic speech recognition (ASR) models. It may also be used for applications relating to computer-aided language learning (CALL) and language or heritage revitalisation.
vi)This datasheet is for cv-corpus-27.0-2026-09-11 of the Mozilla Common Voice Scripted Speech dataset for Vietnamese [Việt - vi]. The dataset contains 20605 clips representing 22.97 hours of recorded speech (7.81 hours validated) from 419 speakers, recorded from a text corpus of 22,058 sentences.
The official language spoken by Vietnamese people.
There are three main variations of the language: Hà Nội, Huế and Saigon.
| Code | Variant | Clips | Speakers |
|---|---|---|---|
| vi-huett | Huế | 1,561 (7.6%) | 6 (1.4%) |
| vi-saigon | Sài Gòn | 404 (2.0%) | 8 (1.9%) |
| vi-hanoi | Hà Nội | 351 (1.7%) | 43 (10.3%) |
| Code | Accent | Clips | Speakers |
|---|---|---|---|
| - | 1,582 (7.7%) | 18 (4.3%) |
The dataset includes the following self-declared age and gender distributions. A coverage summary is shown below each table.
Self-declared gender information. The table shows clip and speaker counts with percentages. Speakers who did not declare a gender are listed as Unspecified. A dash (-) indicates zero.
| Code | Gender | Clips | Speakers |
|---|---|---|---|
| male_masculine | Male, masculine | 9,506 (46.1%) | 78 (18.6%) |
| female_feminine | Female, feminine | 4,114 (20.0%) | 26 (6.2%) |
| transgender | Transgender | - | - |
| non-binary | Non-binary | - | - |
| do_not_wish_to_say | Prefer not to say | 5 (0.0%) | 1 (0.2%) |
| - | Unspecified | 6,980 (33.9%) | 347 (82.8%) |
Gender declared: 13,625 of 20,605 clips (66.1%), 72 of 419 speakers (17.2%)
Self-declared age information. The table shows clip and speaker counts with percentages. Speakers who did not declare an age are listed as Unspecified. A dash (-) indicates zero.
| Code | Age | Clips | Speakers |
|---|---|---|---|
| teens | Teens | 3,909 (19.0%) | 12 (2.9%) |
| twenties | Twenties | 4,411 (21.4%) | 114 (27.2%) |
| thirties | Thirties | 890 (4.3%) | 26 (6.2%) |
| fourties | Fourties | 357 (1.7%) | 5 (1.2%) |
| fifties | Fifties | 5 (0.0%) | 1 (0.2%) |
| sixties | Sixties | 5,044 (24.5%) | 1 (0.2%) |
| seventies | Seventies | 840 (4.1%) | 3 (0.7%) |
| eighties | Eighties | - | - |
| nineties | Nineties | - | - |
| - | Unspecified | 5,149 (25.0%) | 290 (69.2%) |
Age declared: 15,456 of 20,605 clips (75.0%), 129 of 419 speakers (30.8%)
Clip buckets
| Bucket | Clips |
|---|---|
| Validated | 7,013 (34.0%) |
| Invalidated | 505 (2.5%) |
| Other | 13,087 (63.5%) |
Training splits
| Split | Clips |
|---|---|
| Train | 1,848 (26.4%) |
| Dev | 1,515 (21.6%) |
| Test | 1,593 (22.7%) |
Training split coverage: 4,956 of 7,013 validated clips (70.7%)
The dataset contains 7013 validated, 505 invalidated, and 13087 unresolved clips. The average clip duration is 4.013 seconds.
"This text corpus is for the Huế variation only. The source is the Dictionary of the Huế Variation (Từ Điển Tiếng Huế) by Dr. Bùi Minh Đức. The author has granted a permission to use the dictionary. There are about 10,700 sentences posted on Common Voice."
Validated sentences: 16,663
| Category | Count |
|---|---|
| Unvalidated sentences | 5,395 |
| Pending sentences | 5,292 |
| Rejected sentences | 103 |
| Reported sentences | 199 |
The corpus contains 22,058 sentences: 16,663 validated and 5,395 unvalidated (5,292 pending review, 103 rejected), with 199 reported for review.
"The writing system consists of the 26 letters of the English alphabet minus f, j, w, and z. ̣ (These letters are, however, found in foreign loanwords.) and seven modified letters using diacritics: đ, ă, â, ê, ô, ơ, and ư. "
Please refer to Alphabet and Character Frequency: Vietnamese (Việt) (https://www.sttmedia.com/characterfrequency-vietnamese#alphabet)
There follows a randomly selected sample of five sentences from the corpus.
Dictionary of the Huế Variation (Từ Điển Tiếng Huế) by Dr. Bùi Minh Đức.
| Source | Sentences |
|---|---|
| Từ Điển Tiếng Huế by Bùi Minh Đức, 2001, First Edition | 10,751 (64.5%) |
| sentence-collector | 5,710 (34.3%) |
| Other | 202 (1.2%) |
General
| Code | Domain | Clips | Speakers |
|---|---|---|---|
| general | General | 2,128 (10.3%) | 79 (18.9%) |
| agriculture_food | Agriculture and Food | - | - |
| automotive_transport | Automotive and Transport | - | - |
| finance | Finance | - | - |
| service_retail | Service and Retail | - | - |
| healthcare | Healthcare | - | - |
| history_law_government | History, Law and Government | - | - |
| media_entertainment | Media and Entertainment | - | - |
| nature_environment | Nature and Environment | - | - |
| news_current_affairs | News and Current Affairs | - | - |
| technology_robotics | Technology and Robotics | - | - |
| language_fundamentals | Language Fundamentals | - | - |
Each row of a tsv file represents a single audio clip, and contains the following information:
client_id - hashed UUID of a given userpath - relative path of the audio filesentence - the sentence to be read aloudsentence_id - unique identifier for the sentencesentence_domain - domain classification(s) of the sentenceup_votes - number of people who said audio matches the textdown_votes - number of people who said audio does not match textage - age of the speaker1gender - gender of the speaker1accents - accents of the speaker1variant - variant of the language1locale - locale code of the languagesegment - if sentence belongs to a custom dataset segment, it will be listed herevalidated_sentences.tsvThe validated_sentences.tsv file contains one row per validated sentence in the text corpus:
sentence_id - unique identifier for the sentencesentence - the sentence textvariant - the variant of the languagesentence_domain - the domain(s) the sentence belongs tosource - the source the sentence was collected fromis_used - whether the sentence is still in circulation for recordingclips_count - number of clips recorded for this sentenceunvalidated_sentences.tsvThe unvalidated_sentences.tsv file contains one row per unvalidated sentence in the text corpus:
sentence_id - unique identifier for the sentencesentence - the sentence textvariant - the variant of the languagesentence_domain - the domain(s) the sentence belongs tosource - the source the sentence was collected fromup_votes - number of upvotes the sentence receiveddown_votes - number of downvotes the sentence receivedstatus - current status of the sentence (pending or rejected)Presentation in Vietnamese at https://cvtienghue.github.io/presentation
https://cvtienghue.github.io/presentation
Chung V Le , Phung Xung Thi Le
This dataset is released under the Creative Commons Zero (CC-0) licence. By downloading this data you agree to not determine the identity of speakers in the dataset.
For a full list of age, gender, and accent options, see the demographics spec. These will only be reported if the speaker opted in to provide that information. ↩ ↩2 ↩3 ↩4