Today speaking with fellow KDE devels we realized some of them had the region set to the default C region, that basically means something like USA region but not completely, so not something you want when living not in USA.
Currently the name for that text entry for that is "Default", that may lead to problems as you might think the "Default" region is the correct, but it most probably is not. Some people suggested to switch to "Not Set" which is not completely accurate as it is set to C region, but will probably help "non-purist" users to set the correct Region. Other options go through "Default (Not Set)" or "Not Set (C Region)", etc.
So i'm asking the wider audience here, what would you think it would be the better wording?
To see it live go to systemsettings->Regional & Language, choose "Country/Region & Language" option on the left bar and "Country or Region: YourCurrentRegion (change...)" is what we are talking about.