There are huge oportunities out there for teaching a growing and progressively pervasive aspect of the English language.

It is called “whingin’ English”.  LOL

It isn’t an attractive variation on our native language, and the vocabulary is quite limited.  Great intellectual ability will not be needed on the part of the students of the course. 
There is the added real risk of the racist overtones, so teaching the course could be fraught with perils.

Patricia