You've basically proved the point of the commenter you are responding to. By your very own evidence - Spanish and Portuguese utterly dominate Central and South

You've basically proved the point of the commenter you are responding to. By your very own evidence - Spanish and Portuguese utterly dominate Central and South America. There are 650M people there, if ~10% of the population speaks another language, that helps prove the case of 'language from more advanced languages win'. Even where there is relative parity, systems definitely favour the language of the more powerful entity. All over Europe there are 'niche languages' dying out, which is sad, but it's materially the case. Go to Nice, France, and the street signs are in 'Nicoise' - not French. In Monaco if you listen carefully you can hear 'Monegasque'. The decline of those languages is hinted at in the fact my spellchecker doesn't even recognize those words, unfortunately.