Locale Helper

Ease creation and maintenance of glibc locale files

List of locale files | Locales on a map

Other resources for locales

http://en.wikipedia.org/wiki/POSIX
http://pubs.opengroup.org/onlinepubs/009695399/basedefs/xbd_chap07.html
Install script and instructions to install a new locale
The GNU C Library (glibc): Home page, Git repository, pending locale bugs