Tested with Swedish. All messages shown in up2date progress dialogs are untranslated. Both the various messages inside it and the window title.
Created attachment 95218 [details] Screenshot of one of the untranslated progress dialogs in up2date
This is still the case with up2date-4.1.11-3 from Rawhide.
Setting severity to "translation".
Created attachment 128354 [details] checked package
Hi Christian can you please check with following version and confirm up2date-4.3.47-5.i386.rpm
Please check with latest Version of Fedora and if bug still exist, then please reopen the bug and update the Release to Latest Version