The death of English was preceded by the breathtakingly amazing idea by the weirdo hippies in the seventies that the whole language learning process needed to be revamped (not a bad idea in and of itself) by the removal of grammar and general sentence awareness/analysis from the syllabus (moronic).
Add to this making languages (especially latin) elective, and the myopic and parochial view that English is/was THE dominant global language, and you see the result today. (Aside: English is the de facto language of science, currently, though, say, mathematics is a language unto itself.)
I am not particularly concerned. The Spanish of meso-America is already diverging from the Iberian Peninsula, just as the English spoken in Singapore and German in Switzerland are diverging from their cognate forebears (as they must): nothing is constant except change.
Just as the language of ancient Latium has diverged into modern French, Spanish, Portuguese and (with a broad Germanic base) English.
Chinese is also an umbrella group of about 6-12 regional dialects, too, not to mention the similarity between the double-byte character sets.
That actually represents an interesting creative tension: the incompatible alphabetical versus pictographical underpinnings (also Arabic is similar, too ... and there is a strong and growing user base there, too).