Today a colleague asked me if there is any way to find out what the Everyone group is called in a localized version of Windows. In a Swedish Windows, this group is kalled "Alla" and in a German version it's called "Jeder" etc.
There is an easy way to do this with .NET with the (new) .NET 2.0 Security functions.
SecurityIdentifier si = new SecurityIdentifier(WellKnownSidType.WorldSid, null);
NTAccount everyOneGroup = si.Translate(typeof(NTAccount)) as NTAccount;
if (everyOneGroup != null) {
Console.WriteLine(everyOneGroup.Value); // now contains the localized name
}