>According to Wikipedia, FWIW, 1.5 billion people speak English as a first or second language. That means there is a significant language barrier for ~78% of the world.

As I argued, that's not exactly true. As long as your mother tongue is not something totally different, you do not have to qualify as an English speaker to learn how to program. It's the same with games: Sure, kids don't know how to pronounce "Game over", but they know what it means.