Can SwiftKey be moved to the system partition?
First, go to to Root folder then go to "/data/data/.com.android.swiftkey" then copy the "lib" files to "//system/lib" and after that,
go to root then "//data/app" and copy the "swiftkey" apps file to //system/app and restart your phone.
After rebooting open titanium backup, find swiftkey and wipe data.
Done. It wont force close again :)