en
https://gyazo.com/ff52be2374ec1c9b3dc8860a3c7ff515
"Written in English" icon
The page containing the toplevel icon en.icon is written in English by NISHIO Hirokazu.
This page is also written in English.
en.icon
If a page was written in Japanese and then translated into English by machine translation, it will be represented by a different icon jaen. After the "jaen" contents was reviewed and refined by human (usually me, NISHIO Hirokazu), it changes into "en" contents.