Here’s how Wikitongues describes itself:
More than half of the 7,000 languages spoken and signed today are expected to vanish in less than a century. Wikitongues is a unified front against that reality. Together with speakers and signers from around the world, we’re recording oral histories and dictionaries in every language in the world before it’s too late.
It has an impressive YouTube page, and you can read more about it at The Race to Save the World’s Disappearing Languages.
I’m adding this info to The Best Resources For International Mother Language Day.
Here are a couple of their many videos: