Unexpected-Keyboard: A lightweight Android keyboard.
Unexpected-Keyboard: A lightweight Android keyboard.

github.com
GitHub - Julow/Unexpected-Keyboard: A lightweight virtual keyboard for developers.

The gesture support for additional signs is quite nice, but probably annoying if you are used to swipe keyboards.
I find this to be the best keyboard. My language uses a lot of non ascii characters and its so much faster to type them with this!
I use it alongside SwiftKey (with Internet access disabled). It's a godsend in Termux.
try tracker control and you will see that swiftKey doesn't respect that "disable"