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.
Like in German I am actually somewhat eloquent and texts I write don't look like a person with a head injury wrote them.
(Sparked by some of the comments to my recent article about Cory Doctorow telling me how my writing sucks and is unreadable because of grammar mistakes and typos.)
@tante Honestly I'd take people quibbling over how you said something as a compliment, because it means they couldn't find any problem with *what* you were saying.