Where does Anime-sharing's Emote list come from?

[Murakumo]

Where does Anime-sharing's Emote list come from?
as title says

 

[Ignis]

Most of those are LINE stickers, taken from our private collection, with the Japanese words translated.

We keep track of when new sets are added in the Updates thread, starting on 2014/08/14 with the Nekopara stickers.