I could say most of Asian language are pretty much in common, at least one thing for sure, the way we answer "Yes" or "No".
My Asian friends and I often confuse American from this kind of situation...
"You didn't sleep last night?"
"Yes"
"Oh but you look very sleepy."
"Yes, I didn't sleep last night."
"..I thought you said you slept."
"No, I said yes, I didn't sleep last night."
"...."
And so on...
Alright, here is my tips for Americans when you are in this conversation.
Don't pay attention on Yes or No, just focus on what he or she says after that. Such as,
"You didn't sleep last night?"
"Yes, I didn't sleep." >> Ignore "Yes" then you find out that he or she didn't sleep.
And to be fair, I have little tips for foreigners like me too.
Think before you answer, if there is "not" in your reply,
then you need to say "No", like this...
"You didn't sleep last night?"
(Thinking : oh..I did "not" sleep last night so I need to say...)
"No, I didn't sleep last night."
Anyway, be open-minded when you talk to someone from another country.
We are trying to speak your language, hopefully....
