Well, I was born and raised in HK. Surely my English is not as perfect as in the textbook. But I have never seem a native speaker being so picky about others’ usage of preposition.
Why don’t you laugh at those foreigners speaking even more wired Chinese??
But that’s fine. I am just saying why I would insist on speaking in English with my kids, even for just a mixture of a few English words and a trunk of Chinese. How dare you question my good intent?