Why fine-tuning Whisper is a dataset problem OpenAI's Whisper changed what's possible in speech recognition: a single multilingual model with strong zero-shot performance across dozens of languages. But "dozens" is the catch. But for the long tail of the world's languages, even
For more than 75 years, Radio Free Europe/Radio Liberty (RFE/RL) has promoted democratic values by providing accurate, uncensored news and debate in countries where a free press is threatened. RFE/RL reaches more than 44 million people every week across 18 countries, in 24 languages, including Persian, Russian,
In this post, we walk you through how to create a useful dataset sample as a preview of your dataset, and guide you in uploading it to the MDC platform.
The problem with "low-resource" machine translation Most production machine-translation systems in 2026 are still trained on a fairly narrow set of language pairs: the 50 or so for which the open web supplies enough parallel text to push BLEU scores into useful territory. Below that line, MT quality
A curated list of 15 text-to-speech training datasets for teams shipping production voice models in 2026 covering emotional, multi-speaker, audiobook-derived, non-Latin script, indigenous-language datasets and more.
Most voice assistants listen and respond in a handful of languages. Try to build one for your home that speaks your language, though, and you quickly run into a wall: the training data does not exist, or it is locked behind licences that make it unusable for open source projects.
Today, we're excited to share a new way for dataset providers to better understand how their datasets are being used on Mozilla Data Collective with a new data provider analytics portal.
When you ask a voice assistant a question in English, French, or Mandarin, the underlying models have been trained on billions of words and millions of hours of speech. Ask the same question in Bafia, Mada, or Suundi, and the technology simply doesn't know how to listen. The
Today, we're excited to share a new way to stay informed about the latest datasets on Mozilla Data Collective - the ability to subscribe to get updated about similar datasets to your previous downloads.
In 2020, Meta introduced a new benchmark dataset based on Mozilla Common Voice. CoVoST 2 has 34 translation directions for audio to text machine translation. This is one of the most widely-used benchmark datasets for speech translation, with nearly 400 citations on Google Scholar. The dataset is based on version
New capabilities expand uploader control over access and compensation, while helping developers discover more representative datasets
Learn how we automatically generate Croissant metadata to describe datasets on the Mozilla Data Collective platform, making them more discoverable.
Guides
In this guide, we'll walk through the different options available on the platform for sharing your contact information with downloaders and setting expectations about how downloaders or other community members can reach out to you.
FAQ
Fields that make up the terms of use of your dataset cannot be edited after publishing.
Community Authors
The origin of Swahili language Swahili originated from the Indian ocean and has its route from the contacts of Arabian traders with the inhabitants of the east coast of Africa over many centuries. Swahili is the lingua franca of most east african countries spoken largely in countries such as Tanzania,
News
We're excited to share that the Mozilla Data Collective Data Assistant is now available in Alpha. Visit https://mozilladatacollective.com/chat to get started.
Author: Alek Tarkowski For the last twenty five years, standardized open licenses were increasingly seen as a main tool for democratizing access to knowledge. Over less then a decade, a relatively narrow set of canonical choices emerged: the Creative Commons licensing stack https://creativecommons.org/licenses/list.en, coupled with
News
Today we’re so excited to announce exciting platform changes to Mozilla Data Collective that bring us closer to fulfilling our promise to give everyone the Data Platform for Human Agency and Fair Value Exchange.
MDC
With this release, uploaders can now gate access to their datasets, requiring users to request permission and share their email address before downloading.
Guide
A step-by-step developer tutorial from Kostis at Mozilla Data Collective
Guides
In this video, produced by the Data Nutrition Project and illustrated by Jessica Yurkofsky, you'll learn more about the role of the datasheet and how you can use it to give clear guidance to potential downloaders about how your data can (and can't!) be used.
News
In mid-April, Mozilla Data Collective's primary domain will change to mozilladatacollective.com
News
379 new datasets with a Mozilla Common Voice update, improvements to the Python SDK (make sure you update to the latest!) and a preview of an upcoming feature. 👀
Community Authors
Thorsten Müller has created five TTS voice datasets totaling 40 hours of German speech data. In this community-authored post, he speaks to the importance of sharing his voice.