Well, online English speaking communities are gonna have a bias towards native English speakers. Obviously some will browse these communities because they're the largest, but while machine translation makes communication much easier, it's still more difficult than with speakers of your own language. And most native English speakers who aren't also native speakers of a language mutually intelligible with Hindi live in north America. (I'm excluding South Asia because a sizable fraction of the online South Asian communities communicate in the pre-colonization languages, mostly Hindi). Most such people have a shared cultural heritage that is largely European with a British slant.

When you think about it it's not an unreasonable question, when you interpret it to be asking how many of us are outside of the cultural influence of the anglosphere