I don't know about ukeyboard. Other languages will have to be localized to it. ie you'd have to write extra code for the plugin to support other languages - but it should be easy to make that system workable once the actual english version is done.

As for merge requests, one, I assure you, frals and w00t aren't oblivious to these projects. For starters, unless they are way ahead of this one, I doubt much of the source code is useful for this project. Furthermore, every SMS project so far is just for messaging that I know of. This is a universal keyboard. Unless there's something that code has that this keyboard could significantly benefit from, there's no point in combining them. I would advise a combination of efforts though, but that's up to the developers.

- Edit -

Of course, I encourage the actual people working on this to correct me if I'm wrong. I'm just getting contrary because people seem to be spending more time asking for stuff and less time contributing with at the very least, bug reports.