I have been to many countries. With in the same country the pronunciation and use of slang has leaked into the language.
This would explain why there are so many technical words and phrases in Wikipedia that are not in the regular dictionary. I think its time that those that live in America stop referring to the language spoken as "English", as most of our words are derived from Latin (same as "English" but is infused with words added by migration to the US.
I confuses those that you are some sort of authority and must have accidentally found this URL. You see, this is a comic strip. Please do us all a favor and wander over to Wikipedia. I'm sure you will have a blast over there.