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

All Datasets

998 Datasets

RFE/RL

RFE/RL Persian News Text Corpus

This dataset is a longitudinal news corpus for the Persian language sourced from Radio Farda from 2001 to 2026. It contains over 350,000 articles (51M tokens).

License: CC-BY-NC-SA-4.0

Locale: fa

Task: NLP

Format: TXT

Size: 307.78 MB

MirasAI

Saraiki 10 Hours TTS Dataset

A 10-hour Saraiki text-to-speech dataset consisting of recorded speech and aligned transcripts, designed for speech synthesis research and development.

License: CC-BY-NC-SA-4.0

Locale: srk

Task: TTS

Format: WEBM, TSV

Size: 584.44 MB

MirasAI

Kannada Time Aligned Speech Corpus

A 5-hour Kannada speech dataset with time-aligned transcriptions, designed for ASR, forced alignment, and speech research.

License: CC-BY-NC-SA-4.0

Locale: kan

Task: ASR

Format: OGG, SRT

Size: 355.77 MB

MDC Curators

Sentence translation difficulty in Spanish - BOUQuET

A collection of sentences in Spanish from the BOUQuET benchmark (total 1990 sentences) which have been annotated with sentence translation difficulty scores.

License: CC-BY-SA-4.0

Locale: es

Task: MT

Format: TSV

Size: 55.83 KB

Institute of African Digital Humanities

Yezoum_ALCAM-MultimodalDataset

This dataset comprises aligned audio and text data in Yezoum with French equivalents.

License: NOODL-1.0

Locale: ewo

Task: NLP

Format: MP3, TSV

Size: 12.81 MB

Institute of African Digital Humanities

Bamun-French Parallel Corpus 2.0

This dataset is an extended and updated version of the "Bamun-French Parallel Corpus 1.1", a parallel corpus of 4,444 lines in Bamun and French.

License: NOODL-1.0

Locale: bax

Task: MT

Format: TSV

Size: 184.29 KB

Community

Araina Text Corpus (Occitan Aranese)

Text corpus in Aranese variety of Gascon dialect of Occitan

License: CC0-1.0

Locale: oc

Task: LM

Format: txt

Size: 22.97 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

Community

Oro_Word

Afaan Oromoo word-level speech dataset collected to support open-source speech recognition and text-to-speech technology.

License: CC0-1.0

Locale: om

Task: TTS

Format: .WAV, CSV

Size: 1.28 MB

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

INEL Kalmyk Speech Corpus

A 3-hour supervised Speech-to-Text dataset for Kalmyk, a Mongolic language. Features sentence-level audio aligned with scientific text transcriptions.

License: CC-BY-NC-SA-4.0

Locale: xal

Task: ASR

Format: TSV, MP3

Size: 138.31 MB

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

INEL Nganasan Speech Corpus

A 38.5-hour Speech-to-Text dataset for Nganasan, an endangered Samoyedic language. Features audio aligned with text transcriptions.

License: CC-BY-NC-SA-4.0

Locale: nio

Task: ASR

Format: TSV, MP3

Size: 1.29 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

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

INEL Dolgan Speech Corpus

A 13-hour supervised Speech-to-Text dataset for Dolgan, an endangered Turkic language. Features sentence-level audio aligned with text transcriptions.

License: CC-BY-NC-SA-4.0

Locale: dlg

Task: ASR

Format: TSV, MP3

Size: 583.34 MB

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

INEL Kamas Speech Corpus

A 14-hour Speech-to-Text dataset for Kamas, an extinct Samoyedic language waiting to be revitalized. Features audio aligned with text transcriptions.

License: CC-BY-NC-SA-4.0

Locale: xas

Task: ASR

Format: TSV, MP3

Size: 376.64 MB

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

INEL Selkup Speech Corpus

A 1.6-hour supervised Speech-to-Text dataset for Selkup, an endangered Samoyedic language. Features sentence-level audio-text alignments.

License: CC-BY-NC-SA-4.0

Locale: sel

Task: ASR

Format: TSV, MP3

Size: 45.46 MB

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

INEL Enets Speech Corpus

A 3.7-hour supervised Speech-to-Text dataset for Enets, an endangered Samoyedic language. Features sentence-level audio aligned with text transcriptions.

License: CC-BY-NC-SA-4.0

Locale: enf, enh

Task: ASR

Format: TSV, MP3

Size: 140.56 MB

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

INEL Nenets Speech Corpus

A supervised Speech-to-Text dataset for Nenets, a Samoyedic language. Features sentence-level audio aligned with Cyrillic text transcriptions.

License: CC-BY-NC-SA-4.0

Locale: yrk

Task: ASR

Format: TSV, MP3

Size: 8.35 MB

LocaleNLP

English Hausa Parallel Corpus

An English–Hausa dataset with 5,000 sentence pairs useful for machine translation and basic language processing tasks.

License: CC-BY-NC-4.0

Locale: eng, hau

Task: MT

Format: csv

Size: 164.32 KB

Anjuman e Katib

Persian Literature Corpus by Najwai Sukhan

A curated Persian literary corpus of ~1.26M tokens spanning literature, poetry, educational writing, and culturally significant texts.

License: CC-BY-NC-4.0

Locale: fas

Task: NLP

Format: TXT

Size: 38.62 MB

Community

Heroes English-Spanish Dubbed Movie Speech Corpus

7000 single speaker speech segments from the original and Spanish dubbed version of 21 episodes of TV series Heroes

License: CC-BY-SA-4.0

Locale: eng, spa

Task: NLP

Format: wav, csv, txt

Size: 1.68 GB

Institute of African Digital Humanities

Mvele_ALCAM-MultimodalDataset

A multimodal dataset comprising example sentences in Mvele and their French translation, together with audio recordings and an audio mapping file.

License: NOODL-1.0

Locale: ewo

Task: NLP

Format: MP3, TSV

Size: 14.13 MB

EELLAK - GreekFOSS

Istorima

Oral history interviews from Istorima archive (transcriptions+metadata) in Greek on social/cultural/historical topics

License: CC BY-NC-ND 4.0

Locale: gr-GR

Task: NLP

Format: PARQUET

Size: 416.02 MB

UP EEEI - Digital Signal Processing Laboratory

UP - DSP - Philippine Languages Database (UP-DSP-PLD)

A multilingual corpora for ten Philippine languages containing over 454 hours of recordings

License: CC-BY-NC-4.0

Locale: phi

Task: ASR

Format: WAV, LOG

Size: 45.63 GB

Community

Urdu Multi-Speaker TTS Dataset

An Urdu multi-speaker TTS dataset distributed in 36 zip files, each containing audio files and a TSV mapping file, with approximately 10 hours of speech.

License: CC-BY-NC-4.0

Locale: urd

Task: TTS

Format: WEBM, TSV

Size: 514.54 MB