* An immediate switch to English. This was usually in a situation where the person didn't have time or interest in a slow conversation, such as in a restaurant.
* A surprised expression. You speak Norwegian? often followed by: WHY? From a utilitarian point of view there's no reason: I didn't mean anyone who didn't have serviceable or better English. I would say because I fell in love with your language, which didn't change their minds but made them happy, I think.
* No reaction, just a response to whatever I had asked. Whenever that happened, which it did fairly often, I was gratified.
Duolingo gave me grammar & vocabulary, Pimsleur the confidence to open my mouth. My wonderful friends there were patient, helpful & spoke slowly enough that I could manage.
Now I have to figure out how to keep having conversations in the States.