According to this article, 2500 languages are in danger of dying out, mostly in Inida, the US, and Indonesia. On the one hand, I think it would be cool to speak a language with close family members and friends that noone else did. But on the other hand, I can't get too worked up about obscure languages dying out. After all, we're experiencing a sort of reverse tower of Babel effect nowadays, with more and more people having at least one common language.
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If ye love wealth better than liberty, the tranquility of servitude than the animated contest of freedom, go from us in peace. May your chains sit lightly upon you, and may posterity forget that you were our countrymen! - Samuel Adams
One of my closest friends is from Tahiti. She talks about how Tahitian is dying out. She doesn't know it, her parents know it, and it's all her grandparents speak. But the language on the island has shifted to French. Less and less people know Tahitian.
I also watched an episode of 30 Days where some Navajo tribes were trying to preserve that language, but it's so hard to learn that it's also dying out.
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"There is order in the way the Lord reveals His will to mankind. . .we cannot receive revelation for someone else's stewardship." L. Tom Perry