Something I’ve learned as someone with high proficiency in another language that I learned in adulthood (I would never say fluent, maybe “functionally” fluent): Poor pronunciation (I.e. thick accent) but good grammar is usually more forgiven by a native than great pronunciation but poor grammar. Because then you sound more native, but you sound a bit… mentally slow. I am in the latter camp. My Mandarin Chinese accent…
I agree. I've been speaking (American) English 99% of the time for the past thirty years but still have a noticeable German accent, never get any flak for that. Apparently Joseph Conrad spoke with a heavy Polish accent so that's my excuse. What's sad is that educated people look down on people speaking "grammatically incorrect" even if their way of speaking is consistent within their group and conveying meaning perfe…
My experience of working with Germans in tech is that the accent is actually an asset. It's totally playing into a certain stereotype of all Germans being great engineers. "I mean...he is German...he must be smart!"