Official bundle of Common Voice spontaneous speech datasets for 21 languages is available via the link:
https://datacollective.mozillafoundation.org/datasets/cmfzu8u8wa555eq8onrk334h4
For the 5 languages without spontaneous data we used Common Voice scripted datasets version 23. At the time of writing the current version is 24, and direct links to the version 23 do not work. Probably any current version will suit. Please search 5 corresponding languages via the link:
https://datacollective.mozillafoundation.org/datasets

Directory structure of the datasets is the following:

mozilla-shared-task-1st-place-mms-training
|
|-- cv-corpus-23.0-2025-09-05
|   |
|   |-- ady
|   |   |
|   |   |-- clips
|   |   |   |-- common_voice_ady_41822822.mp3
|   |   |   |-- ...
|   |   |   |-- common_voice_ady_43592770.mp3
|   |   |-- clip_durations.tsv
|   |   |--  ...
|   |   |-- validated.tsv
|   |-- ...
|   |-- ush
|
|-- mcv-sps-st-09-2025
    |
    |-- sps-corpus-1.0-2025-09-05-aln
    |   |
    |   |-- audios
    |   |   |-- spontaneous-speech-aln-29890.mp3
    |   |   |-- ...
    |   |   |-- spontaneous-speech-aln-63486.mp3
    |   |-- ss-corpus-aln.tsv
    |   |-- ss-reported-audios-aln.tsv
    |-- ...
    |-- sps-corpus-1.0-2025-09-05-ukv

vecxoz/mozilla-shared-task-1st-place-mms-training

Shared Task: Mozilla Common Voice Spontaneous Speech ASR

vecxoz/
mozilla-shared-task-1st-place-mms-training