From the proposals to the design, a bevy of rules govern emojis. To submit a proposal to Unicode, you must follow a strict format, in writing, that includes your emoji's expected usage level ...

In 2015, Oxford Dictionaries declared the "face with tears of joy" emoji its word of the year. New York's Museum of Modern art has added the original emoji set to its permanent collection.

“Emoji is one way language is growing,” she says. “When it stops growing and adapting, that’s when a language dies.” Growing and adapting doesn’t seem like an issue for emojis.