I mean, people would obviously propose English to be the world language, but its problematic since that is like telling the world that British Imperialism is somehow “okay”, which is not okay.
So we need another language.
But how could we possibly agree on one?
Do we just find the 100 rarest languages then use one of those?
Do we create a new one?
It also raises the question. If (or when) we meet aliens, which language are we going to introduce them to?