Are emoji ruining the English language?!

Here is a sensible, popular article about what emoji are and what they aren’t, and what possible effects they might have on the language:
http://the-toast.net/2016/06/29/a-linguist-explains-emoji-and-what-language-death-actually-looks-like/
And, by the way, what is the plural of “emoji”? Is it “emojis” or “emoji”?