Adding to no one in particular... as I've been following several potential destinations for the Twitter mass migration, they all have one thing in common: 99% of posts are in English. Twitter's age and market penetration let it reach a large worldwide audience. As Mastodon has been around for 6 or more years, it too has some international diversity, but less that Twitter I think. (Someone chime in on the language of the population if you have info?