A dystopia where every human can speak to any other?
Imagine it was the other way around. There is a single language humans speak and someone suggests we should instead split in hundreds of non mutually intelligible ones. Why would any one want that?
Because it's more interesting I think. Like I find europe more interesting than USA because the cultures are more varied and a big reason for that is the language variation.
Sadly we are becoming more homogenised already. Dialects are disappearing and it's becoming possible to speak English everwhere as well as to dine in MacDonalds.