Common Voice ( https://commonvoice.mozilla.org/ https://commonvoice.mozilla.org/ ) is one such project. I've urged the people I know who have less-common accent

Common Voice ( https://commonvoice.mozilla.org/ https://commonvoice.mozilla.org/ ) is one such project. I've urged the people I know who have less-common accents to contribute, but I'm not sure they have. Good, high quality, wide coverage, labeled datasets are expensive to assemble. Most companies don't want to give them away. You can find a number from academia, though.