There are small things, like saving significant (but not huge) sums of money: https://nationalpost.com/news/canada/official-bilingualism-costs-2-4b-a-year-stud

There are small things, like saving significant (but not huge) sums of money: https://nationalpost.com/news/canada/official-bilingualism-costs-2-4b-a-year-study https://nationalpost.com/news/canada/official-bilingualism-c... There are more important things like producing documents only once, and presenting ideas only once. I went to a fully bilingual university, and every brochure and every sign and every everything was produced and printed twice. Then there are the huge things: right now there are 7000 languages, so any given person only gets to enjoy a tiny fraction of the cultural product produced by those 7000 speakers. There'd be a massive gain in the efficiency of consumption if some random shepherd in Nepal had a blog that some random doctor in Mexico could read natively and be inspired. Or if some kid rapping in Bucharest about his problems were natively understandable to some kid listening in Brazil.