How are iPhone emoji apps made?

Question

Does anyone know how it is done?

They seem to be enabling japanese language settings.. But how?

It's impossible to search for it, because of all the outrage over Emoji apps in the app store.

Thanks a bunch!

Answer 1

The language settings are stored in /User/Library/Preferences/com.apple.Preferences.plist which is on the user partition and isn't sandboxed off from third-party applications. Enabling Emoji everywhere is a simple matter of adding the KeyboardEmojiEverywhere key to this file and giving it a value of true.