Earlier quoted context omitted.
Adoption makes it entirely possible for an Asian-presenting person to have a European first name _and_ surname and, frankly, is not something you should be asked about in an interview.
You'd expect an adoptee to have perfect English
There are people with issues like dyslexia and people who don't fit the education system and perform poorly.
I've met non-native speakers who have far better spelling, grammar and an enlarged vocabulary than people who have lived in my English-speaking country for their whole lives.