As with so many things, this is basically a map of GDP / area. In this case there's another layer on top of that where # of programming languages scales faster

As with so many things, this is basically a map of GDP / area. In this case there's another layer on top of that where # of programming languages scales faster after a certain wealth threshold. For instance, the city of Toronto has a GDP equivalent to a couple of specific countries (and larger than most countries), but created more programming languages than the equivalent countries.