[jb1991]

I'd be willing to bet that less than half of this site's users are American. There is a huge software engineering community in Europe, for example, and there are more Europeans than Americans, let alone the large populations of Asia, Australia, New Zealand...

English is the dominant second language in the world.

[13of40]

I would agree with that, at least for this site. I wouldn't be surprised if the ratio was 1 to 10, since tech skews it significantly. For example, I work in tech in the US, and the only American I've spoken to today was my summer intern, and - oh hold up, I just typed that and realized she's from Canada. OK, I've been in work meetings all day and I have not spoken to a "US American" during that time. I suspect that other sites, particularly some subreddits, are mostly American, though.