Datasets | Mozilla Data Collective

Community

Kanuri Lexicon

A structured Kanuri lexical resource containing headwords, grammatical labels, English definitions, and source entry information.

License: CC-BY-NC-4.0

Locale: kau

Task: N/A

Format: CSV, JSONL, TXT, MD

Size: 577.46 KB

Community

Ukrainian–Russian–Surzhyk Read Speech

3,117 read-speech recordings containing Ukrainian, Russian, and Surzhyk, with transcripts and anonymous speaker IDs

License: SURZHYK-TERMS-0.1.0

Locale: uk, ru

Task: ASR

Format: WAV, TSV, MD

Size: 240.92 MB

Community

Synthetic Javanese–Indonesian Conversational Speech

13,469 synthetic Javanese–Indonesian conversational utterances (~61 h) made with Gemma 4 text and VoxCPM2 speech for Lost in Transcription.

License: CC-BY-SA-4.0

Locale: jv,id

Task: ASR

Format: WAV, TSV

Size: 5.25 GB

CDS

MALOBA Lingala OCR transcriptions, harmonised text (v1.1)

1,282 harmonised Lingala OCR text lines (104 pages, 535 NLLB units), text only, OCR test set excluded.

License: NOODL-1.0

Locale: ln

Task: NLP

Format: JSONL

Size: 391.72 KB

CLEAR Global

TICO-19 (Covid-domain) Speech – Congolese Swahili

TICO-19 COVID-19/medical domain sentences read aloud in Congolese Swahili, recorded by CLEAR Global in 2021

License: CC-BY-NC-4.0

Locale: swc

Task: ASR

Format: MP3, TSV

Size: 190.76 MB

CLEAR Global

Read Speech in Congolese Swahili (11h)

5,000 Congolese Swahili read-speech audio clips (~11 hours) with French translations, from CLEAR Global's Gamayun mini-kit.

License: CC-BY-NC-SA-4.0

Locale: swc

Task: ASR

Format: MP3, TSV

Size: 144.25 MB

Community

Italian female voice reading Italian Penal Code

Italian Female Voice, 60yo, reading the italian penal code

License: Apache-2.0

Locale: ITA

Task: TTS

Format: .wav

Size: 3.71 GB

Brett Williams Studios LLCCompensated

🚧 Hitch Hiker 'Mirror Suit' Robotics Data 🚧

High-specularity optical edge-case dataset (425 assets) for benchmarking computer vision and autonomous navigation against severe specular reflections.

License: LICENSE.md

Locale: en

Task: CV

Format: NEF, JPEG

Size: 4.47 GB

Community

Central Kanuri Speech Dataset

Central Kanuri (kau) speech corpus: 3,576 recordings, 12.04 hours of approved audio, 24 contributors, supporting low-resource ASR research.

License: CC-BY-NC-4.0

Locale: knc

Task: ASR

Format: WAV, TSV

Size: 3.35 GB

Community

ASR Javanese-Lumajang Dialect

This ASR dataset comprises 10 hours of natural speech in the Javanese-Lumajang dialect in East Java, Indonesia and contains code-switching into Indonesian.

License: CC-BY-NC-SA-4.0

Locale: jav

Task: ASR

Format: OPUS, TSV

Size: 81.38 MB

Rohingya Language

Rohingya Hanifi–Rohingyalish–English Lexicon

15,926 English–Rohingya lexical pairs in Rohingyalish and generated Hanifi script for transliteration, education, and NLP research.

License: CC-BY-4.0

Locale: rhg, en

Task: NLP

Format: JSONL, CSV, MD

Size: 333.79 KB

Common Voice

Common Voice Scripted Speech 27.0 - Pashto

A collection of read speech recordings in Pashto.

License: CC0-1.0

Locale: ps

Task: ASR

Format: MP3

Size: 97.70 GB

Community

IND-Magelang Traffic Signs and Facilities

This dataset contains various traffic signs and public facilities located along roadways, Magelang, Central Java Province, Indonesia.

License: CC-BY-NC-SA-4.0

Locale: ind

Task: CV

Format: JPEG, WEBM, JSON

Size: 118.36 MB

Bahasa Bahana

BAHANA: Parallel Corpus IND-ENG-ARB

The dataset covers a parallel corpus of 5,174 lines of literal translation text in Indonesian, English and Arabic.

License: CC-BY-SA-4.0

Locale: ind,eng,arb

Task: MT

Format: TSV

Size: 437.30 KB

MDC DatasetsCompensated

🚧 Northern Pashto Corpus for Speech Recognition 🚧

A Northern Pashto ASR dataset with approximately 10 hours of audio with transcriptions.

License: MDC DLA-1.0

Locale: pbu

Task: ASR

Format: MP3, TSV

Size: 514.50 MB

MirasAICompensated

English 10 Hours Medical Speech Evaluation Dataset (Synthetic)

A 10-hour English medical speech dataset designed for evaluating and improving speech recognition systems in healthcare-related scenarios.

License: MirasAI Data License

Locale: eng

Task: TTS

Format: PARQUET, CSV, JSON, SQL, MD

Size: 922.38 MB

MDC DatasetsCompensated

🚧 Tagalog Voice Notes ASR Dataset (45 hours) 🚧

A Tagalog speech recognition dataset consisting of 45+ hours of transcribed conversations recorded via voice memos on WhatsApp and Telegram.

License: MDC DLA-1.0

Locale: tl

Task: ASR

Format: MP3, TSV

Size: 1.24 GB

Community

LRAC 2.0 Common Voice 26.0 Bundle

Thirteen Common Voice Scripted Speech 26.0 locale releases bundled for the LRAC 2.0 Challenge 2026.

License: CC0-1.0

Locale: mul

Task: OTH

Format: MP3, TSV

Size: 209.57 GB

MDC DatasetsCompensated

🚧 Tagalog Health Domain TTS 20 Hours Single Speaker (Female) 🚧

20 hours of studio-quality read Tagalog speech in the health domain (texts from openly-licensed health articles), all from a single female speaker.

License: MDC DLA-1.0

Locale: tl

Task: TTS

Format: WAV, TSV

Size: 6.56 GB

MDC DatasetsCompensated

🚧 Tagalog Health Domain TTS 25 Hours Single Speaker (Male) 🚧

25 hours of studio-quality read Tagalog speech in the health domain (texts from openly-licensed health articles), all from a single male speaker.

License: MDC DLA-1.0

Locale: tl

Task: TTS

Format: WAV, TSV

Size: 6.74 GB

Community

Public Space and Sign in Javanese-Speaking Regions

A dataset of 477 photos covering public spaces across Blitar, Surabaya, Yogyakarta, Surakarta, and Ngawi, Java Island, Indonesia.

License: CC-BY-NC-SA-4.0

Locale: ind

Task: CV

Format: JPEG, WEBM, JSON

Size: 912.96 MB

TidyVoice2026 Challenge

TidyVoiceM_ASV

TidyVoiceM_ASV (or Tidy-M in the paper) has 212,617 speakers in 81 languages.

License: CC0-1.0

Locale: mul

Task: OTH

Format: WAV

Size: 641.76 GB

Common Voice

Common Voice Scripted Speech 27.0 - Fang

A collection of read speech recordings in Fang.

License: CC0-1.0

Locale: fan

Task: ASR

Format: MP3

Size: 198.88 MB

Common Voice

Common Voice Scripted Speech 27.0 - Dawoodi

A collection of read speech recordings in Dawoodi.

License: CC0-1.0

Locale: dmk

Task: ASR

Format: MP3

Size: 206.93 MB

All Datasets

Compensated datasets

English 10 Hours Medical Speech Evaluation Dataset (Synthetic)

English Medical Speech Dataset (Synthetic)

Single Speaker Urdu TTS dataset (Female Speaker, South Punjab)

Kanuri Lexicon

Ukrainian–Russian–Surzhyk Read Speech

Synthetic Javanese–Indonesian Conversational Speech

MALOBA Lingala OCR transcriptions, harmonised text (v1.1)

TICO-19 (Covid-domain) Speech – Congolese Swahili

Read Speech in Congolese Swahili (11h)

Italian female voice reading Italian Penal Code

🚧 Hitch Hiker 'Mirror Suit' Robotics Data 🚧

Central Kanuri Speech Dataset

ASR Javanese-Lumajang Dialect

Rohingya Hanifi–Rohingyalish–English Lexicon

Common Voice Scripted Speech 27.0 - Pashto

IND-Magelang Traffic Signs and Facilities

BAHANA: Parallel Corpus IND-ENG-ARB

🚧 Northern Pashto Corpus for Speech Recognition 🚧

English 10 Hours Medical Speech Evaluation Dataset (Synthetic)

🚧 Tagalog Voice Notes ASR Dataset (45 hours) 🚧

LRAC 2.0 Common Voice 26.0 Bundle

🚧 Tagalog Health Domain TTS 20 Hours Single Speaker (Female) 🚧

🚧 Tagalog Health Domain TTS 25 Hours Single Speaker (Male) 🚧

Public Space and Sign in Javanese-Speaking Regions

TidyVoiceM_ASV

Common Voice Scripted Speech 27.0 - Fang

Common Voice Scripted Speech 27.0 - Dawoodi