Nice summary, Gibb.

My only suggestion is that "from a specific lingocentric view" seems either gratuitous or too vague. The spelling represents a word in English, and as we know, the almost inevitable pronunciation of "chantie/ chantey" would have been like the sound in "church" or "chant."

The "sh" spelling, which I used to prefer, makes clear the actual pronunciation (of everyone who's ever commented on the pronunciation).

Oh, yeah. A better word is "linguacentric." But even plain "linguistic" seems to work here.