Common Voice Scripted Speech 24.0 - Welsh

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License:

CC0-1.0

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Steward:

Common Voice

Task: ASR

Release Date: 12/5/2025

Format: MP3

Size: 3.87 GB


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Description

A collection of scripted spoken phrases in Welsh.

Considerations

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

Cymraeg — Welsh (cy)

This datasheet has been generated automatically, we would love to include more information, if you would like to help out, get in touch!

This datasheet is for version 24.0 of the the Mozilla Common Voice Scripted Speech dataset for Welsh (cy). The dataset contains 116002 clips representing 158.4 hours of recorded speech (124.07 hours validated) from 1931 speakers.

Language

Variants

Demographic information

The dataset includes the following distribution of age and gender.

Gender

Self-declared gender information, percentage refers to the number of clips annotated with this gender.

GenderPercentage
Undefined43.0%
Male Masculine33.0%
Female Feminine25.0%

Age

Self-declared age information, percentage refers to the number of clips annotated with this age band.

Age BandPercentage
Undefined43.0%
Twenties13.0%
Thirties9.0%
Teens2.0%
Fourties16.0%
Fifties9.0%
Sixties7.0%
Seventies1.0%

Data splits for modelling

The official data splits for modelling this language are as follows. Of the validated clips, 20.74% are included in the splits.

SplitCount
Train8024
Test5409
Dev5403

Text corpus

The text corpus contains 118058 sentences, of which 118044 are validated, 14 are invalidated and 176 are reported.

Writing system

Symbol table

Sample

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

Fe'i nodweddir gan ordewdra, clefyd y galon, clefyd siwgr, gorbwysedd a chyfnod oes byrrach.
Mae padlo a chaiacio hefyd yn boblogaidd ar y llyn hwn.
Mae’r pwllyn wedi ei leoli mewn gwirionedd yn olion crater.
Mae hwn yn cynnwys manganîs, ffosfforws, nitrad, asid lactig, a decstros!
Ond mae cwmnïau siartredig yn mynd yn ôl i'r cyfnod canoloesol.

Sources

Text domains

DomainCount
Undefined116001
General100.0%

Processing

Recommended post-processing

Fields

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

  • accent - accent of the speaker1

  • segment - if sentence belongs to a custom dataset segment, it will be listed here

Get involved!

Community links

Discussions

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Acknowledgements

Datasheet authors

Citation guidelines

Funding

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

  1. For a full list of age, gender, and accent options, see the demograpics spec. These will only be reported if the speaker opted in to provide that information. 2 3