It's kinda the same with human languages - wouldn't it be better if all Europeans had one language, or in fact if the whole world just spoke English/Chinese? Th

It's kinda the same with human languages - wouldn't it be better if all Europeans had one language, or in fact if the whole world just spoke English/Chinese? The thing is there are cultures invested in the languages they learned from their parents. Well, there are Rust and Elixir and Ruby devs who are invested in their language. Not only are they invested, in many cases they actually love their language and deep down think its mostly superior to other languages. They don't wanna speak Java. How will you change their minds? Also - not all companies adopt more than 1-2 languages. It's pretty crazy to have 5-10 languages in one company I think.