International English..simple, it's the English that has been handed down, rearranged and taught to unaware students across the globe as real English.
Let me explain...after leaving England, English went to America and got ruined, then other countries started learning, adding accents and new vocab etc. Then (this is the worst part) these new speakers of English started teaching this "2nd hand" English to other foreign learners. Due to a shortage of actual British people, no doubt, but nowadays you have, for e.g. Chinese people teaching other Chinese people how to speak English.....and so we have the new "International English" (also known as "American English") or as I like to call it, "3rd-hand Engilsh"