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Release Date: 9/17/2026
Format: MP3
Size: 260.36 MB
A collection of read speech recordings in Cornish (Kernowek).
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.
kw)This datasheet is for cv-corpus-27.0-2026-09-11 of the Mozilla Common Voice Scripted Speech dataset for Cornish [Kernowek - kw]. The dataset contains 11269 clips representing 12.9 hours of recorded speech (12.42 hours validated) from 11 speakers, recorded from a text corpus of 9,611 sentences.
Cornish, or Kernewek, is a Brythonic language, alongside Breton and Welsh, and part of the Celtic Indo-European language family. It is an indigenous language of the United Kingdom, with most speakers located in Cornwall. In the 2021 UK Census 567 people self-identified Cornish as their main language. UNESCO has classified its status as "severely endangered".
| Code | Accent | Clips | Speakers |
|---|---|---|---|
| - | 2,828 (25.1%) | 5 (45.5%) |
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 | - | - |
| female_feminine | Female, feminine | 3,876 (34.4%) | 4 (36.4%) |
| transgender | Transgender | - | - |
| non-binary | Non-binary | 5 (0.0%) | 1 (9.1%) |
| do_not_wish_to_say | Prefer not to say | - | - |
| - | Unspecified | 7,388 (65.6%) | 6 (54.5%) |
Gender declared: 3,881 of 11,269 clips (34.4%), 5 of 11 speakers (45.5%)
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 | 5 (0.0%) | 1 (9.1%) |
| twenties | Twenties | - | - |
| thirties | Thirties | - | - |
| fourties | Fourties | 3,866 (34.3%) | 3 (27.3%) |
| fifties | Fifties | 5,301 (47.0%) | 1 (9.1%) |
| sixties | Sixties | 257 (2.3%) | 2 (18.2%) |
| seventies | Seventies | 526 (4.7%) | 1 (9.1%) |
| eighties | Eighties | - | - |
| nineties | Nineties | - | - |
| - | Unspecified | 1,314 (11.7%) | 4 (36.4%) |
Age declared: 9,955 of 11,269 clips (88.3%), 7 of 11 speakers (63.6%)
Clip buckets
| Bucket | Clips |
|---|---|
| Validated | 10,853 (96.3%) |
| Invalidated | 397 (3.5%) |
| Other | 19 (0.2%) |
Training splits
| Split | Clips |
|---|---|
| Train | 6,265 (57.7%) |
| Dev | - |
| Test | 2,403 (22.1%) |
Training split coverage: 8,668 of 10,853 validated clips (79.9%)
The dataset contains 10853 validated, 397 invalidated, and 19 unresolved clips. The average clip duration is 4.121 seconds.
The dataset contains 10.8 validated hours of speech from 10 unique contributors.
| Type | Count | Hours |
|---|---|---|
| Validated Clips | 9,357 | 10.8 |
| Invalidated Clips | 0 | 0.00 |
| Total Clips | 9,357 | 10.8 |
Validated sentences: 9,609
| Category | Count |
|---|---|
| Unvalidated sentences | 2 |
| Pending sentences | 2 |
| Rejected sentences | - |
| Reported sentences | 43 |
The corpus contains 9,611 sentences: 9,609 validated and 2 unvalidated (2 pending review, 0 rejected), with 43 reported for review.
Cornish has several writing systems in place. The majority of this dataset uses the Standard Written Form, established in 2008.
The dataset uses the following characters:
' - ! , . ? a b c d e f g h i j k l m n o p r s t u v w x y z
There follows a randomly selected sample of five sentences from the corpus.
The text for this dataset comes from the following sources:
| Source | Sentences |
|---|---|
| Cornish Language Office | 9,608 (100.0%) |
| Other | 1 (0.0%) |
| Code | Domain | Clips | Speakers |
|---|---|---|---|
| general | General | 12,724 (112.9%) | 11 (100.0%) |
| 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)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