You needed to load the Pre-installation patch 1204 "Before" performing the upgrade.
This patch MUST be installed prior to upgrading from 2.2 to 3.1.
The patch, as well as information related to it, is located at the following shortened link:
As far as what you can do, well, perhaps boot from CD and re-master the hard drive, then, reload CM 2.2, then load a backed up set of translations. Most sites perform backups at 1am every day. Hopefully that is your case too.
Then, load the pre-installation patch outlined above, and then perform the CM 3.1 upgrade and then install the post patch 11410 also from the above link.
I might be missing something here, but that's what I would do.
Let's see what others have to say.
Good Luck.