I haven't traveled abroad very much, but when I did, I was so scared to speak for fear of being 'found out' as an american (or simply foreigner). I think this was shyness, awareness of bad behavior from other americans, and humility in my lack of language practice and cultural knowledge. I even have this cute story when I was visiting a town in England (where they do speak English, so the anxiety was eased). While waiting for a train, I was craving a snack. My traveling partner noticed a shop across the street and encouraged me to go in. I couldn't get myself to do it. We chatted about it for a few moments. And then a girl seated on a bench nearby who was snacking on the very same snack from the same shop that I was too timid to try offered me one of hers. It was sweet, her unexpected kindness I will never forget.