And Europe should abolish about three dozen major languages that should no longer be in use and adopt English (or perhaps Spanish). Why does Bulgaria need its own language? Or Romania, or Sweden? Why does French still exist? We're talking about efficiencies here, right? What's less efficient than people not being able to easily communicate by sharing a common language.
I always get a kick out of bringing this up, because while it's extraordinarily logical to narrow down dozens of languages to one or a few, people lose their minds about it and regard it as a sacred cultural issue that is to never be touched. Whereas converting to the metric system... well but of course, that only makes sense!