Almost every conversation in our house is bi- or tri- lingual. At conferences, people flip back and forth across shared languages trying to find the right words, while referencing key terms in source languages. My Fedi instance feed runs in German, Dutch, English, French, Spanish, Greek, Catalan; my own feed includes Bangla, Mandarin, and Hindi. Research by anthropologists and historians suggests that most humans, through most of history, were #polyglot.
So when the "wow, it's bilingual" stuff starts circulating here on the Fedi it's a sure sign the monoglot-disabled community from the UK and USA have arrived as part of the twitter exodus.