I think you misread my comment. I did not complain about their parents ability to understand
English.

I simply said that their parents are sending their kids to study in a western country in a
language they, (the students), don't understand.

You wrote: "But that's OK because daddy can tell all his friends how rich he is by sending his kid halfway round the world to study in a language that he cannot understand a word of."

The subject of the sentence is "daddy". "His friends" and "his kid" and "language that he cannot understand" contain referential pronouns. Are you saying now that the third pronoun refers to "his kid"?

I could not imagine that a teacher would write that one of his students does not understand one word of English.

I apologize for 'misreading' your sloppy use of pronouns while you complain about your students' complete lack of spoken English ability.