I'd like to add that it's never too late to try to preserve these cultures, traditions and languages. Getting interested to the ones of your place of residence, even if you're not from there originally, can be a great experience.

One of the best ways to do it is through singing and dancing (they go great together), and more generally, there are often chorals and various groups dedicated to these cultures, traditions and languages.

And indeed when you get into this kind of thing, you realize how much culture has been erased (in my case, the Occitan culture), but also you can see how much is left, and how important it is to preserve it.

It also helps a lot when reflecting on our own modern, imposed, culture, and realize that some of the things we think have always been there, have not.