Common Voice Scripted Speech 25.0 - English

English — English (en)

This datasheet is for cv-corpus-25.0-2026-03-09 of the Mozilla Common Voice Scripted Speech dataset for English [English - en]. The dataset contains 2574404 clips representing 3765.76 hours of recorded speech (2751.56 hours validated) from 99724 speakers, recorded from a text corpus of 1,720,488 sentences.

Language

English is a West Germanic language with origins in England. There are an estimated 1.5 billion English speakers, making it the most widely spoken language in the world. English is commonly learned as a second language in many countries.

Accents

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.

Gender declared: 1,573,738 of 2,574,404 clips (61.1%), 21,830 of 99,724 speakers (21.9%)

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.

Age declared: 1,656,376 of 2,574,404 clips (64.3%), 23,096 of 99,724 speakers (23.2%)

Data splits for modelling

Clip buckets

Training splits

Training split coverage: 1,180,618 of 1,881,067 validated clips (62.8%)

The dataset contains 1881067 validated, 310527 invalidated, and 382810 unresolved clips. The average clip duration is 5.266 seconds.

Text corpus

Validated sentences: 1,681,626

The corpus contains 1,720,488 sentences: 1,681,626 validated and 38,862 unvalidated (34,938 pending review, 3,924 rejected), with 9,638 reported for review.

Writing system

The English writing system is based off of the latin alphabet.

Symbol table

a b c d e f g h i j k l m n o p q r s t u v w x y z

Sample

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

1. Pus collects in the renal pelvis and causes distension of the kidney.

2. The Rockingham site was redeveloped and sub-divided into residential lots.

3. One form, the anoscope, resembles a tube that has a removable bullet-shaped insert.

4. The following four referee pairs were selected.

5. The show also featured Mike Patton and Fred Frith as guests.

Sources

Text domains

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)

Get involved

Community links

• Common Voice translators on Pontoon

• Common Voice Communities

Discussions

• Common Voice on Matrix

• Common Voice on Discourse

• Common Voice on Discord

• Common Voice on Telegram

Contribute

• Speak

• Write

• Listen

• Review

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 demographics spec. These will only be reported if the speaker opted in to provide that information. ↩ ↩2 ↩3 ↩4