I'm not too sure about all this. As I used to tell my children, If it ain't in Oxford, it ain't a word. And, there's only about 300,000 words in the Oxford Dictionary.
And, The Global Language Monitor is an American company. That's why there's scepticism about the claim. Watch the BBC's video on this claim, When does a word become a word. Only if you have nothing better to do.
Only the Americans can take lexicography to a razzmatazz-y state of ecstasy.
The original effort to lexicograph English words into the Oxford English Dictionary by Professor James Murray and his team in 1857 is colourfully and wonderfully woven into a highly readable narrative by the intrepid traveller-writer, Simon Winchester, in an improbably titled book, The Surgeon of Crawthorne (U.K.) or, The Professor and the Madman (U.S.).