Who wrote the words longest word?

This is a bit of a trick question! The phrase "longest word" is not a word itself, but a description.

There are a few ways to approach this:

* If you're asking who first used the phrase "longest word," that's impossible to know for sure. It's a natural expression that would have been used countless times throughout history.

* If you're asking who wrote the longest word in any given language, that depends on the language! There are many contenders for the title, and the "winner" can change depending on how you define "word."

Let me know if you'd like me to tell you about some of the longest words in different languages!