On-premise version 4.4 is not planned, the next on-premise version will be 5.0 with new features.
I assume you're asking mainly about the language fix. To be more accurate, the default AV language fix is independent of cloud / on-premise console version. The fix is in setup-file which is served by common backend => So the fix is in On-premise version 4.3 as well. You just need to download the new setup file from the console.