[gumby]

Most of them don’t speak English either — this is merely something that has to go on your lorry.

[aatharuv]

Not speaking English, doesn't imply they don't understand English words or phrases that have gotten into what languages they do speak.

[gumby]

Why I mean is you can’t ask them “why is OK in the middle of the phrase” because the answer is “that’s how it goes”.

No different from asking an English speaker how some foreign loan word entered their usage or why, say, only the accusative. “Agenda” is singular in English and if you asked a random person on the street why they would shrug.

[appleiigs]

OK Please ask them in whatever language they speak.

[webkike]

Lol, I don’t think the parent was suggesting that they can’t answer because the interviewer was only asking them in English, but rather they don’t know what the English phrase means precisely most of the time