I took a few Linguistic courses, but not enough to get a Minor in it.
There's a basic
non -argument in Linguistics, about Prescriptive Grammar vs. Descriptive Grammar.
Pre- vs. De-
So English Teachers use Pre-
Linguists use De-
ESL - english or any other language learned after the prime learning years of 3 - 8, sticks in the brain in all sorts of weird locations.
ESL speakers understand each others' B-minus graded "perfect" english quite well.
This even if persnickity English teachers turn up their (collective) noses.
I personally have no trouble at all understanding deeply accented english, no matter the far off back ground.
Greek, French, Spanish, Chinese, Zambia versions of shorty english ... no problem.
I carted around a bunch of South Korea security guys, just after 9/11. They didn't all get good grades in their translation classes.
Tying in the tangent ... this E-prime looks to me like someones "nifty" attempt at a slightly simplified english.
Good luck, he'll need it.
Y'know those trade betting sites, where yes/no penny bets are placed on various ideas.
I'd bet my personal fortune (not that it amounts to anything at all), on ZERO. NADA. ZILCH. ZIPPO. NOTHING. period
(but that's just me)
{ ... the very minor dialect of english, I speak, drops the "to be" in some sentence structures, and I can't remember any examples right now ... }