In Mint 14 Cinnamon live DVD, when I update all packages, install and change language for the whole system, log out and log in, then the whole system is translated, except folder names on the desktop. They don't change their names into a changed language. For example "Computer", "Network Servers", "Trash" etc. keep their original names on the desktop (but in the Nemo window, on the left panel, their names are translated).
Also the time applet shows the calendar with the original names of the days, "M", "T", "W", "T", "F", "S", "S", so they should be translated.