Human languages are much more generalized.
Sure, you can find domain-specific examples of one human language being preferable to another though, like when Korean Air forced all its pilots to communicate in English, even Korean->Korean pilots, because in English you can tell explicitly a person who is older/more senior than you that they're about to kill everybody on the plane, without defaulting to making that a polite "it seems as though perhaps what if" suggestion.
On a country-level, we've successfully normalized a given language across large populations and large geographies. Often without involving genocide or prison camps.
If we can roll out vaccines to the globe over a couple years and a few trillion dollars, then surely rolling out a global language over a generation or two would only be 1 or 2 orders of magnitude more challenging, but it would likely result in far more benefit to the human race in the medium/long term, and probably even in the short term too.
