I guess I am using too much mandarin in class such that I can't explain some words in English. But to think of it, have you ever wondered that if we switch the role of spoken language and written language, will anything change for the better or the worst. Imagine all text are change to your root language and all spoken words are in English.

No offence to any other races or what, I supposed most people would know that I speak mandarin more than English unless there is no choice. But I am quite of curious if anyone could speak in English but at the same time write in Chinese words?