We're officially counting down to #DocumentFreedomDay2026 on March 25th. One Free format I've been investigating is the mo file used by gettext. This format is a great way to provide #internationalization in a standardized manner to programs. Projects don't have to reinvent the wheel to provide language support. A msgfmt program converts po files (human readable) to mo format for use with libintl which is part of GNU gettext. There are other compatible implementations too. BSD offers libcitrus. musl C library includes support and gettext-tiny makes use of musl to provide a lightweight alternative for embedded systems. There are C, Perl and Python versions of msgfmt. I'm learning more about the format by writing my own msgfmt utility. Have favorite Free formats of your own? Please share them with the list as we count down to #DFD2026.