Mozilla Common Voice datasets (release metadata)
Source: https://github.com/common-voice/cv-dataset
Structured fields
{
"archived": false,
"checked_at": "2026-10-17T00:00:00.000Z",
"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",
"source_owner": "Mozilla Foundation",
"next_check_at": "2026-10-20T00:00:00.000Z",
"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
- [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
- [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
| component | license | hosting | redistribution | modification | training | Evidence and notes |
|---|---|---|---|---|---|---|
| dataset | unknown | unknown | unknown | unknown | 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. |
| code | MPL-2.0 | permitted | restricted | permitted | not_applicable | Web app / metadata repositories are MPL-2.0 per GitHub. |