[Peter Funk] > ... > AFAI found out, LC_MESSAGES was added to the POSIX "standard" in Posix.2. FYI, it appears that C99 declined to adopt this extension to C89, but don't know why (the C99 Rationale doesn't mention it). That means the vendors who don't already support it can (well, *will*) use the new C99 std as "a reason" to continue leaving it out.