Privacy Keyboard is an ENGLISH keyboard that requires no permissions, it does not send your keystrokes over the internet, save them, or exploit them in any way. The keyboard is basic but secure.To use the keyboard go to Settings->Language & Input->Current Keyboard->Choose Keyboards and enable Privacy Keyboard.
This is a forward development of the code written by Chris Black (http://www.blackcj.com/blog/2016/03/30/building-a-custom-android-keyboard/). The original source code is available for you to compile it yourself using Android Studio.