Datasets | Mozilla Data Collective

All Datasets

Compensated Datasets

API

Contribute Datasets

Loading datasets...

Terms

FAQs

Participation Guidelines

Responsible Disclosure

News and Documentation

Data and Model Competitions

[email protected]

Terms

FAQs

Participation Guidelines

Responsible Disclosure

News and Documentation

Data and Model Competitions

[email protected]

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

All Datasets

Not sure where to start?

Describe what you are building and the Data Assistant will find the right datasets for you.

Try the Data Assistant

Filtered by

Search results for “covost 2”

100 Datasets

RFE/RL

RFE/RL Macedonian News Text Corpus

Longitudinal Macedonian news corpus from Radio Slobodna Evropa (2002-2026) with over 204,000 articles and 46M tokens.

License: CC-BY-NC-SA-4.0

Locale: mk

Task: NLP

Format: TXT

Size: 133.95 MB

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: 11.07 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: 59.07 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

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

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: 2.75 GB

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: 3.40 GB

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

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

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

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

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

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