Many of the people I do have online conversations with speak English as their first language. I kinda get by but you native speakers really underestimate how hard it is to express oneself in a foreign language. Concepts work differently, metaphors don't really translate, references you have used for decades don't make sense.
@tante as someone whose third language is German (English second) I can kinda relate to this, especially the concepts part, which seems to only get messier as I spend more time working in German. I still have things that are exclusive to each language (though my Dutch is now so bad that I think people assume I'm a German immigrant when I visit my parents).
Science is an English thing. Politics are a German thing. Cooking is a mix of all of them (none of them particularly coherent).