Common Voice Scripted Speech 25.0 - Basque

License:

CC0-1.0

Steward:

Common Voice

Task: ASR

Release Date: 3/23/2026

Format: MP3

Size: 14.48 GB

Description

A collection of read speech recordings in Basque (Euskara).

Specifics

Licensing

Creative Commons Zero v1.0 Universal (CC0-1.0)

https://spdx.org/licenses/CC0-1.0.html

Considerations

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.

Processes

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.

Metadata

Euskara — Basque (`eu`)

This datasheet is for cv-corpus-25.0-2026-03-09 of the Mozilla Common Voice Scripted Speech dataset for Basque [Euskara - eu]. The dataset contains 464733 clips representing 702.03 hours of recorded speech (472.44 hours validated) from 11048 speakers, recorded from a text corpus of 1,030,978 sentences.

Language

Accents

Code	Accent	Clips	Speakers
mendebalekoa	Mendebalekoa (Araba, Bizkaia, Gipuzkoako mendebaleko herri batzuk)	134,808 (29.0%)	1,857 (16.8%)
erdialdekoa_nafarra	Erdialdekoa edo Nafarra (Gipuzkoa, Nafarroa)	105,190 (22.6%)	1,469 (13.3%)
nafarlapurtarra_zuberoata…	Nafar-lapurtarra edo Zuberotarra (Lapurdi, Nafarroa Beherea, Zuberoa)	837 (0.2%)	28 (0.3%)
-	Other	9,495 (2.0%)	335 (3.0%)

Demographic information

The dataset includes the following self-declared age and gender distributions. A coverage summary is shown below each table.

Gender

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	115,748 (24.9%)	959 (8.7%)
female_feminine	Female, feminine	132,435 (28.5%)	1,096 (9.9%)
transgender	Transgender	-	-
non-binary	Non-binary	-	-
do_not_wish_to_say	Prefer not to say	50 (0.0%)	1 (0.0%)
-	Unspecified	216,495 (46.6%)	9,495 (85.9%)

Gender declared: 248,238 of 464,733 clips (53.4%), 1,553 of 11,048 speakers (14.1%)

Age

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	7,413 (1.6%)	201 (1.8%)
twenties	Twenties	78,621 (16.9%)	371 (3.4%)
thirties	Thirties	25,561 (5.5%)	402 (3.6%)
fourties	Fourties	75,519 (16.2%)	605 (5.5%)
fifties	Fifties	49,159 (10.6%)	393 (3.6%)
sixties	Sixties	18,207 (3.9%)	158 (1.4%)
seventies	Seventies	1,661 (0.4%)	20 (0.2%)
eighties	Eighties	23 (0.0%)	3 (0.0%)
nineties	Nineties	215 (0.0%)	5 (0.0%)
-	Unspecified	208,354 (44.8%)	9,423 (85.3%)

Age declared: 256,379 of 464,733 clips (55.2%), 1,625 of 11,048 speakers (14.7%)

Data splits for modelling

Clip buckets

Bucket	Clips
Validated	312,746 (67.3%)
Invalidated	50,590 (10.9%)
Other	101,397 (21.8%)

Training splits

Split	Clips
Train	134,472 (43.0%)
Dev	14,808 (4.7%)
Test	14,808 (4.7%)

Training split coverage: 164,088 of 312,746 validated clips (52.5%)

The dataset contains 312746 validated, 50590 invalidated, and 101397 unresolved clips. The average clip duration is 5.438 seconds.

Text corpus

Validated sentences: 1,018,163

Category	Count
Unvalidated sentences	12,815
Pending sentences	12,335
Rejected sentences	480
Reported sentences	1,257

The corpus contains 1,030,978 sentences: 1,018,163 validated and 12,815 unvalidated (12,335 pending review, 480 rejected), with 1,257 reported for review.

Sample

There follows a randomly selected sample of five sentences from the corpus.

Nire makurra hortik heldu da.
Besoak antxumatuta geratu zen furgoneta ziztu bizian pasatzen ikusi arte.
Miresten zaitut, bai zu eta bai erakusten dituzun sentimendu horiek.
Duela urtebete lege-proposamena erretiratu egin behar izan zuten ez zutelako oposizioko taldeen babesa.
Horrainoxe bakarrik iritsi behar zuen Warburtonek, eta ez aurrerago.

Sources

Source	Sentences
Armiarma - Estrata Liburuak, SL	835,629 (82.1%)
corpus of EiTB news sentences	100,665 (9.9%)
wiki	55,023 (5.4%)
Other	26,846 (2.6%)

Text domains

Code	Domain	Clips	Speakers
general	General	21,543 (4.6%)	806 (7.3%)
agriculture_food	Agriculture and Food	7 (0.0%)	6 (0.1%)
automotive_transport	Automotive and Transport	6 (0.0%)	5 (0.0%)
finance	Finance	4 (0.0%)	3 (0.0%)
service_retail	Service and Retail	7 (0.0%)	7 (0.1%)
healthcare	Healthcare	22 (0.0%)	18 (0.2%)
history_law_government	History, Law and Government	-	-
media_entertainment	Media and Entertainment	6 (0.0%)	5 (0.0%)
nature_environment	Nature and Environment	6 (0.0%)	6 (0.1%)
news_current_affairs	News and Current Affairs	-	-
technology_robotics	Technology and Robotics	23 (0.0%)	17 (0.2%)
language_fundamentals	Language Fundamentals	2 (0.0%)	2 (0.0%)

Fields

Clips

Each row of a tsv file represents a single audio clip, and contains the following information:

client_id - hashed UUID of a given user
path - relative path of the audio file
text - supposed transcription of the audio
up_votes - number of people who said audio matches the text
down_votes - number of people who said audio does not match text
age - age of the speaker1
gender - gender of the speaker1
accents - accents of the speaker1
variant - variant of the language1
segment - if sentence belongs to a custom dataset segment, it will be listed here
prompt_upvotes - number of upvotes the sentence prompt received
prompt_reports - number of reports the sentence prompt received
is_edited - whether the clip's transcription has been edited

`validated_sentences.tsv`

The validated_sentences.tsv file contains one row per validated sentence in the text corpus:

sentence_id - unique identifier for the sentence
sentence - the sentence text
variant - the variant of the language
sentence_domain - the domain(s) the sentence belongs to
source - the source the sentence was collected from
is_used - whether the sentence is still in circulation for recording
clips_count - number of clips recorded for this sentence

`unvalidated_sentences.tsv`

The unvalidated_sentences.tsv file contains one row per unvalidated sentence in the text corpus:

sentence_id - unique identifier for the sentence
sentence - the sentence text
variant - the variant of the language
sentence_domain - the domain(s) the sentence belongs to
source - the source the sentence was collected from
up_votes - number of upvotes the sentence received
down_votes - number of downvotes the sentence received
status - current status of the sentence (pending or rejected)

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Licence

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.

Footnotes

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