English is the top spoken language in any given country today. With that being said, calling it American...go for it. The thing is (as
GAMETA
) pointed out - it's widely spoken in all of the America's. North America is Canada, United States, and Mexico. Then there's Central America (to be honest, they're not on top with English) but South America has many countries that also have English as a second language. Mexico (from everywhere I've been) is getting pretty fluent and has had ESL from pre-K - University for over 25-years now. United States and Canadian English (depending on the territory) should be referred to as a form of colloquial English nowadays. I'm U.S. American and went through the dreaded English courses in the United States and even my college professors couldn't pronounce some basic English words correctly.
Call your new language '
Murican and people will get it and that way we can continue to pronounced the following words incorrectly:
Especially - commonly mispronounced as "Eck-specially" (same with the Latin Et Cetera being pronounced as "Eck-cetera")
Espresso - Maybe not English by origin but widely used and mispronounced as "Expresso."
Prerogative - Most U.S. Americans say "Puragutive"
Ask vs. Axe - One is this start of a question and the other is a tool. It doesn't matter that some modern dictionaries tried adapting this into the word "Ask." If you're pronouncing it as "Axe," it's not being "American" it's just bad pronunciation.
There's also confusing words that sound alike into something else in U.S. American English like "cavalry" being called "Calvary" or "disoriented" for "disorientated." As a former ESL teacher who was born in the U.S., I was unfortunately unable to teach my students American U.S. English due to common grammar contruct and syntax errors.
I guess that
'Murican could be a language in the same way other crypto languages exist with English as their roots such as -- Klingon, Dovahzul, et cetera (eck-cetera).