When I lived in the US, I had a co-worker ask me to speak my native language (I'm Canadian) so I used a little bit of French assuming she wanted to hear the other official language. She spent 3 days telling me to stop joking around and speak my native language. I finally asked what she thought my native language was, fully expecting her to name a First Nation dialect. She confidently informed me that the true language of Canada is Latin. I laughed thinking it was a joke, but no, she was somehow 100% certain Latin is what ppl spoke in Canada.
