[needle0]

This was probably written with only the English-speaking part of Twitter in the writer's field of view. English in Twitter doesn't comprise even a third of all tweets ( https://www.vicinitas.io/blog/twitter-social-media-strategy-... ); in fact, for pure tweets that aren't RTs nor replies, the above data even shows there are more Japanese tweets than there are in English, albeit by a slim margin.

So, I agree it's about the people, but I don't see the people leaving, at least in the languages I use.

[Kye]

I think anyone who spoke Japanese and was going to move already did during the series of Japanese migrations. Some of the biggest instances are from Japan.