They are created by the local collaborators of the one who invented the engine.

For WinCE are developed on demand and specifications by MicroSoft and NNG. This was initially transferred to Android, and then the need for better mechanisms arose.
This is how many were created, developed by various developers, and according to Google's specifications. Most of them were published in:
[Only registered and activated users can see links. ]
Google has its own engine, of course, built into the system.

[Only registered and activated users can see links. ] supports our languages from these areas.