When the makeproductgroups parameter is enabled, the description for each group created automatically when creating a new product is in English in localized installations of Bugzilla. This default description should be localizable.
The group description is hardcoded in editproducts.cgi at line 268: my $group_description = "Access to bugs in the " . $product->name . " product"; It should be replaced by a call to get_text(). This could be a problem if different administrators use a different language, but on most installations, we can assume that they all use the same language.
Bugzilla 3.2 is restricted to security bugs only. Moreover, this bug is either assigned to nobody or got no traction for several months now. Rather than retargetting it at each new release, I'm clearing the target milestone and the bug will be retargetted to some sensible release when someone starts fixing this bug for real (Bugzilla 3.8 more likely).
This has been fixed in Bugzilla 3.4, see bug 313122.