There's a very ambitious project trying to archive all languages of the world, called the Rosetta Project. I was very surprised to find also information on seldom languages like shipibo, although it's not much. But for a lot of indigenous languages like Sirion, Pampanagan or Tadaksahak (no, I don't know them either ;-) they even have short word lists. And it's an open source project, so they need assistance. More information about the project in an recent article at Wired.

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