https://docs.oracle.com/cd/E88353_01/html/E37839/localedef-1.html
localedef - man pages section 1: User Commands
localedef - define locale environment The localedef utility converts source definitions for locale categories into a format usable by the functions and...
man pagessectionusercommands
https://lists.debian.org/debian-glibc/2005/11/msg00051.html
Bug#187630: marked as done (libc6: localedef uses . in its input path)
https://manpages.ubuntu.com/manpages/trusty/man1/localedef.1.html
Ubuntu Manpage: localedef - compile locale definition files
compile locale definition files
ubuntumanpagecompilelocaledefinition