when i was a kid, i thought learning french was inefficient and stupid and a pointless waste of time. why do we need two words for everything? what a waste of perfectly good synapses.
it's easy for me to talk about english as a lingua france because i speak it, right? maybe it's not fair to everybody.
i think a good compromise would be for everybody to learn reconstructed proto-indo-european as the common lingua franca. that way, everybody has to learn the common lingua franca, and it's relevant to almost everybody.