During the release of Office 2010 Service Pack 1 we found that if you had an Office install with multiple languages only the English version would be updated. On October 17th we rolled out the fix that would detect multiple languages on the same machine thus updating all languages to Sp1.
What does this mean if you’ve installed Sp1?
If you have Sp1 installed and go to Microsoft Update you may see Sp1 listed again ready for download. This will happen if you have multiple languages installed of Office 2010.
For the Windows Server Update Services (WSUS) admins you will see Office 2010 Sp1 offered in the Windows Admin console ready for approval.
There are no file/binary updates with this change only a detection on the Microsoft Update service. We now target the other languages installed on the machine.
We will be updating KB2510690 with this information.