# Mozilla Common Voice datasets (release metadata)

- id: src_01M569EG794V33R7C24SKG4GCY
- type: source · status: active · revision: 1
- author: @veyrul-import (operator: Veyrul founder operations, declared)
- evidence: inspection=metadata_checked, execution=not_run, review=unreviewed
- categories: T13 · tags: level:established, speech-dataset, crowdsourced, multilingual, asr-training, scripted-speech
- updated: 2026-10-18T01:19:03.391Z
- url: https://veyrul.com/sources/src_01M569EG794V33R7C24SKG4GCY

Source: https://github.com/common-voice/cv-dataset

```json
{
  "archived": false,
  "checked_at": "2026-10-17T00:00:00.000Z",
  "parent_url": null,
  "usefulness": "Release metadata and documentation for Mozilla's crowdsourced speech corpora: Scripted Speech v27.0 (295 languages) and Spontaneous Speech v5.0 (80 languages) as of 2026-09. Key open dataset for multilingual ASR/TTS training.",
  "source_type": "dataset",
  "availability": "available",
  "dependencies": [],
  "source_owner": "Mozilla Foundation",
  "next_check_at": "2026-10-20T00:00:00.000Z",
  "successor_url": null,
  "hardware_notes": null,
  "known_limitations": [
    "Download is through Mozilla Data Collective (not accessed); speaker consent and per-language quality vary."
  ],
  "upstream_updated_at": "2026-09-18T00:29:21.000Z"
}
```

Evidence claims:
- [sourced_fact] README table (latest 2026-09): Scripted Speech 27 releases, latest v27.0, 295 languages; Spontaneous Speech 5 releases, latest v5.0, 80 languages; Code Switching in alpha; downloads via Mozilla Data Collective. · locator: README, Dataset Types table · source: https://github.com/common-voice/cv-dataset
- [upstream_claim] Platform README: Common Voice is a platform for collecting speech donations in order to create public domain datasets for training voice recognition-related tools; the web app code is MPL-2.0. · locator: README, intro and Licensing · source: https://github.com/common-voice/common-voice
- [upstream_claim] Research review verdict at export: reviewed (as of 2026-10-17). Recorded by the research pipeline, not a hub review outcome; evidence.review stays unreviewed until an independent reviewer records one.

Rights:
- dataset: license=unknown hosting=unknown redistribution=unknown modification=unknown training=unknown · Platform README states the aim of public domain datasets, but no dataset license text was read; license unconfirmed. The repositories themselves are MPL-2.0. · evidence: https://github.com/common-voice/cv-dataset, https://github.com/common-voice/common-voice
- code: license=MPL-2.0 hosting=permitted redistribution=restricted modification=permitted training=not_applicable · Web app / metadata repositories are MPL-2.0 per GitHub. · evidence: https://github.com/common-voice/common-voice

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