As you can see even now, speaking a lot of languages (also called "multilinguism") creates HUGE problems: I can see that into EU at now, where being 28 (27) nations who speaks 22 different languages is creating infinite problems, not last the feeling we're strangers to each other, even if we're brothers.
For pratical uses, even if asgardians motherlanguage english speakers are 27% in the first 20 countries by members, we choose to speak english as even others told they can speak it too, that's to avoid creating a babel, so more problems than we can solve at first.
But, for the future, I think no one should be advantaged (or, better, disadvantaged) 'cause of his/her language (the same as skin color, religion, political faith, etc.), thus the need of a third party (better if projected) language to learn from scratch.
This I'm saying into EU, and this I'm saying even here into Asgardia, even if all have the freedom to study whatever language they wish. But a language is made to make people to understand each other and, as I'm seeing we into EU are not understanding ourselves, it should be better that "2nd generation" asgardians will understand themselves, not having to say "you're advantaged as xyz is your motherlanguage".
A language is also made to make persons feel like a people, and speaking different languages or, even worst, others' language, doesn't accomplish to it.
So, to use a known sentence: One people, one unity one language.