Is my ethnicity Korean/Mexican or Asian/Hispanic?

Alright so my cousins told me that my ethnicity is not what I had claimed, which was Korean/Mexican. He stated that I am actually Hispanic/Asian. I told him that both of us were technically correct but I more accurately fall under Korean and Mexican as opposed to the broad Hispanic and Asian. He said that I was an idiot because I can’t claim my ethnicity is Korean or Mexican because I wasn’t born there. He believes that I’m wrong and he’s right, can someone please tell me in more detail why we are both correct rather than my answer being incorrect.
Answers

Anonymous

. Your cousin is somewhat right and rude. Your cultural ethnicity or nationality is what you have sole citizenship to or multiple citizenship to, but Asian and Hispanic aren’t cultural ethnicities; they are too general and informal as racial ethnicities. Your racial category is the multiracial / biracial category. You is racially mixed with East Asian, European, and Amerindian races. .

Anonymous

Hispania was located in Europe, not mesoamerica

Zirp

Not if you don't speak the language that goes with it

Barry

You can have a DNA test which will indicate your ancestry. Google it for cost.