Some slight progress, I guess, when you can accept my newly created word. However, the correct form in which it should be written is deech- with two 'e'. This is to avoid any analogy to "teach" /(real, decent teaching). No, and the correct meaning of deech is 'pretend to teach"...Hence, a deecher who deeches is a pretend teacher who pretends to teach, and I need not repeat that I regard you as a deecher.

You are both a deecher of Chinese as well as of English.

I accept you have your own homemade verb 'to deech' (should be 'to deach') and i accept that you mean to 'deech' means to teach incorrectly.

Waffle! If you pretend to teach, it goes that you teach incorrectly.