As a data point, I'm bilingual, and have been for about 30 years (my first language isn't English), and I'm kind of an idiot. So there's that.<p>In all seriousness though, this is something that's only debated in very large countries with a dominant culture and common language (US, Russia, UK, France, etc). Growing up in a smaller country that has its own language, pretty much everyone has to read/write and speak English at some level.