nooj wrote:All the languages you are learning, you have to abandon for let's say 5 years. You have to replace them with languages that have less than 2 million speakers. What language(s) do you pick?
I would refuse the premise entirely, because French is the language I normally speak with my wife and her family, and I'm not going to stop learning it, any more than I'll ever stop working on using my native English better. I don't learn languages for ideological reasons. I learn them to communicate with specific people, or to enjoy specific bodies of literature and art.
And honestly, I personally wouldn't bother to learn a language spoken by fewer than 2 million people unless (1) I needed to communicate regularly with speakers of that language (and they were willing to speak it to outsiders), or (2) I was especially interested in the literature or art of that culture, or (3) I fell massively in love with the language itself. Even then, it would be hard to personally justify spending 500 to 2000 hours on a language that I would rarely get to use. Even Middle Egyptian, which was once the lingua franca of an empire, has only a few hundred pages of really interesting literature. So the reality is that Egyptian has to remain a hobby. And even then, I love it because it allows me to hear the voices of people who were ancient history even when Athens was young. For me, it's still all about the people that spoke it. (And the delightfully weird verbs. But that wouldn't be enough by itself.)
I have a lot of admiration for people that fall madly in love with an obscure language, and who put vast effort into learning it. But if I had to give up my languages that are (or were!) spoken by more than 2 million people, then I'd probably mostly give up on language learning.