if you are searching for the already installed MOSS 2007 language packs and don’t know where to find them, open the Registry Editor and search for the following path:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Shared Tools\Web Server Extensions\12.0\InstalledLanguages
It will give you a list with the installed languages, providing the corresponding LCIDs (e.g. 1033 for “English”).
Fig. 1: RegEd reporting three installed language packs for MOSS 2007.
Make sure not to change any settings in this place, as MOSS 2007 will manipulate these settings automatically upon installation/uninstallation of a language pack.
Enjoy and have a good time!