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Participation Guidelines

Responsible Disclosure

support@mozilladatacollective.com

Mozilla Data Collective is a mission-locked British company, incubated by Mozilla Foundation, and backed by the not-for-profit Mozilla.org

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Search results for “covost 2”

100 Datasets

Open Home Foundation

Dimitar 1.0

Text to speech dataset for Bulgarian, male speaker, approximately 2 hours of read speech.

License: CC0-1.0

Locale: bg-BG

Task: TTS

Format: WEBM

Size: 109.58 MB

Common Voice

Common Voice Scripted Speech 26.0 - Erzya

A collection of read speech recordings in Erzya.

License: CC0-1.0

Locale: myv

Task: ASR

Format: MP3

Size: 65.17 MB

Common Voice

Common Voice Scripted Speech 26.0 - Nüpode Huitoto

A collection of read speech recordings in Nüpode Huitoto.

License: CC0-1.0

Locale: hux

Task: ASR

Format: MP3

Size: 230.39 MB

THA_ATLAS

StackOverflow Vector Dataset - C

Language-specific StackOverflow vector dataset for C.

License: CC-BY-SA-4.0

Locale: en-US

Task: RAG

Format: Parquet

Size: 3.59 GB

THA_ATLAS

StackOverflow Vector Dataset - Javascript

Language-specific StackOverflow vector dataset for Javascript.

License: CC-BY-SA-4.0

Locale: en-US

Task: RAG

Format: Parquet

Size: 22.60 GB

TidyVoice2026 Challenge

TidyVoiceX2_ASV

This dataset is designed for speaker verification using the Mozilla Common Voice corpus, covering approximately 40 additional languages beyond those included in TidyVoiceX_ASV. It comprises recordings from different speakers, each of whom appears in multiple languages. Leveraging this multilingual overlap, we construct trial pairs to investigate cross-lingual variation in the speaker verification task. This dataset served as the evaluation set for the TidyVoice 2026 Challenge.

License: CC0-1.0

Locale: mul

Task: OTH

Format: WAV

Size: 23.07 GB

Common Voice

Common Voice Scripted Speech 26.0 - Kichwa

A collection of read speech recordings in Kichwa.

License: CC0-1.0

Locale: qvi

Task: ASR

Format: MP3

Size: 250.63 MB

Open Home Foundation

Berta 1.0

Text to speech dataset for Hungarian, female speaker, approximately 1 hour of read speech.

License: CC0-1.0

Locale: hu-HU

Task: TTS

Format: FLAC

Size: 209.52 MB

Common Voice

Common Voice Spontaneous Speech 4.0 - Breton

A collection of spontaneous responses to questions in Breton.

License: CC0-1.0

Locale: br

Task: ASR

Format: MP3

Size: 21.43 MB

Common Voice

Common Voice Scripted Speech 26.0 - Tush

A collection of read speech recordings in Tush.

License: CC0-1.0

Locale: bbl

Task: ASR

Format: MP3

Size: 247.84 MB

THA_ATLAS

StackOverflow Vector Dataset - Matlab

Language-specific StackOverflow vector dataset for Matlab.

License: CC-BY-SA-4.0

Locale: en-US

Task: RAG

Format: Parquet

Size: 764.29 MB

Common Voice

Common Voice Scripted Speech 26.0 - Indus Kohistani

A collection of read speech recordings in Indus Kohistani.

License: CC0-1.0

Locale: mvy

Task: ASR

Format: MP3

Size: 448.96 MB

MDC Curators

Corpus de llenguatge ofensiu en català

This dataset consists of sentences tagged as offensive-language in the version 25.0 release of Mozilla Common Voice in Catalan.

License: CC-BY-SA-4.0

Locale: ca

Task: NLP

Format: TSV

Size: 57.35 KB

THA_ATLAS

StackOverflow Vector Dataset - Kotlin

Language-specific StackOverflow vector dataset for Kotlin.

License: CC-BY-SA-4.0

Locale: en-US

Task: RAG

Format: Parquet

Size: 1006.93 MB

Institute of Finno-Ugric/Uralic Studies, University of Hamburg

INEL Evenki Speech Corpus

A 2.5-hour supervised Speech-to-Text dataset for Evenki, an endangered Tungusic language. Features sentence-level audio aligned with text transcriptions.

License: CC-BY-NC-SA-4.0

Locale: evn

Task: ASR

Format: TSV, MP3

Size: 103.03 MB

Prompsit Language Engineering

Prompsit D1 - Inline Asset Integrity

MT benchmark for preserving inline tags, placeholders and ICU markup under translation; EN to 9 languages.

License: CC-BY-4.0

Locale: mul

Task: MT

Format: JSONL

Size: 201.48 KB

Common Voice

Common Voice Scripted Speech 26.0 - Yiddish

A collection of read speech recordings in Yiddish.

License: CC0-1.0

Locale: yi

Task: ASR

Format: MP3

Size: 43.16 MB

Common Voice

Common Voice Spontaneous Speech 4.0 - Gorani

A collection of spontaneous responses to questions in Gorani.

License: CC0-1.0

Locale: hac

Task: ASR

Format: MP3

Size: 225.34 MB

Digital Divide Data

ddd-kenya-somali-68hrs-asr-part2

A collection of high-quality, crowdsourced audio recordings and verified transcriptions for the Somali language, produced by Digital Divide Data.

License: CC-BY-4.0

Locale: som

Task: ASR

Format: WAV, TSV

Size: 8.07 GB

MDC Community Concierge

VoxForge - Hebrew

32 minutes (307 utterances) of read speech of ‭עברית‬ (Hebrew).

License: GPL-3.0

Locale: he

Task: ASR

Format: WAV, TSV

Size: 126.98 MB

Open Home Foundation

Dmitri 1.0

Text to speech dataset for Russian, male speaker, approximately 2 hours of read speech.

License: CC0-1.0

Locale: ru-RU

Task: TTS

Format: WEBM

Size: 96.63 MB

Common Voice

Common Voice Scripted Speech 26.0 - Chokwe

A collection of read speech recordings in Chokwe.

License: CC0-1.0

Locale: cjk

Task: ASR

Format: MP3

Size: 263.01 MB

RFE/RL

RFE/RL Tajik News Text Corpus

Longitudinal Tajik & Russian news corpus from Radio Ozodi (2000-2026) with over 166,000 articles and 20M tokens.

License: CC-BY-NC-SA-4.0

Locale: tg,ru

Task: NLP

Format: TXT

Size: 145.27 MB

THA_ATLAS

StackOverflow Vector Dataset - R

Language-specific StackOverflow vector dataset for R.

License: CC-BY-SA-4.0

Locale: en-US

Task: RAG

Format: Parquet

Size: 4.67 GB