Quoting 7.5 Standard Locales:
"Defining and installing named locales is normally a responsibility of the system administrator at your site (or the person who installed the GNU C library). It is also possible for the user to create private locales. All this will be discussed later when describing the tool to do so."
I would expect that "discussed later" refers to some info node, not to the FAQ , which also mentions the tool only in passing. However, I was unable to find `localedef` in the info; it is not in the index of files.
Note that there is a manual page for `localedef` but that does not count as "later" either.
As a workaround, I suggest replacing the last sentence of the quoted paragraph with a reference to the manual page; the problem with that approach is that, given that `man` is non-GNU, you need to invoke `groff` directly to read manual pages in a GNU-only system, which is rather intricate and inconvenient.
Or do we mean "later" as in the future? :-P
 <URL: http://sourceware.org/glibc/wiki/FAQ#Programs_using_libc_have_their_messages_translated.2C_but_other_behavior_is_not_localized_.28e.g._collating_order.29.3B_why.3F >