Since yesterday, the really cool fork of openboard with active development and support of adding a swype library manually, got rebranded into Heliboard. A release on izzyondroidrepo and fdroid should be coming soon.
PS. If you are using the old fork you have to remove it first and do a backup of your settings.
I want to use one of these OSS keyboards, but man they suck a lot for non-English typing.. and especially if you want/need multiple languages!
I use it for English and German. And it works great.
I use it for Spanish and it works perfectly, what language are you trying?