Supervisor to teacher: "I speak English, you don't understand it. I speak XXX (real language not mentioned here), you don't understand it. Even my 4 year old son understands what I say."
Teacher to others in the department: Do you understand what this supervisor is saying?
Other teachers: "No. He only speaks gibberish"
The four year old understands because he has been brought up by this person and has been listening to this gibberish since birth.
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