I came across everyday topic on Techlore Discussions about free and open source keyboards for Android and discovered this little gem. It is FlorisBoard, a virtual keyboard for Android which respects privacy of the user. I can sigh with relief and finish my search for that singular keyboard for typing stuff on the go.
Multilanguage support: detailed layout options, popular presets
Swift and glide typing experience
Customizable gestures: switch language by fast swiping the keyboard itself left and right, change case by swiping up, the infamous cursor swipe on space bar
Emojis
Clipboard
Smartbar: quick actions and clipboard cursor tools
This is my problem with every keyboard (FOSS or otherwise) since Swype finished. Gboard is the best of the bunch now but I'm loath to use it. I have tried Floris and Open (a fork of it which has swiping) and others, and they are all painful on this front.