This topic has been brought up many times. Over 7000 different languages exist, and of course, this is a result of civilizations developing differently. We should be thankful for this, as it makes us experience a different kind of speech that the language we speak could have easily developed into all those years ago, and the beauty of many civilizations' history, and often, a language is the product of many years' work, development, and often, tragedy. It would be a shame to lose the last native speaker of an endangered language, and there would go thousands of years of history (for most languages). So, it is true that many languages have little speakers left, but the thing is, this is another form of the "brain-drain" crisis developing countries are facing.
Brain-drain is a term regarding developing countries, where they lack "brains". I mean, surely, there, for the most part, is an equal chance of people being born smart or stupid, but say they are born a very smart person. That person probably wouldn't want to stay in that country once they grow up, leaving for a more developed one, sort of like languages. If you can communicate with just over 100 people, why speak that language?
This would seem the case, but when you hear a language, there is often a history associated with it that you just think of, because it just seems natural. Sort of like when I think of people speaking Russian, I think about beautiful, intricate architecture on a snowy, dark background. It just seems so natural, now, that that type of speech would fit some kind of background, and humans, as naturally curious as we are, want maps. We want order, for the most part. We should learn about a language that would fit the great wilderness, the calm prairies, and everything older, less spoken languages have stood for.
Finally, there is also a moral aspect to trying to save an endangered language. One of the worst feelings I can think of is not being able to communicate. It's almost as annoying as talking with a friend, then having their friend, who you don't know, come along and talk about people you don't know. We don't want that to happen, to people who only speak one endangered language. To many people, especially those who live in groups, understand the need to help others, and equity is almost essential. They, and I'm sure anyone, would like to pass away (I'm talking far future now) knowing that everything they ever did well was in good hands, and that includes the language they spoke being saved. (It may be obvious here that I am referring to Indigenous languages)
I would like to thank you, if you took the time to read all of that, or even considered looking at this post, and of course, many languages are endangered because there is no written component, but I suggest also making a Latin alphabet version of the language. Of course, this would take a long time, but I think it is worth supporting. So, I should make a duolingo group where we can discuss these, and if you speak an endangered language, we would love to learn it, and hopefully even propose a course for it!
Wow, bien joué