gettext

GNU internationalization and localization library and tools

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GNU internationalization (i18n) and localization (l10n) library

gettextmsgfmtmsgmergexgettextmsgcatmsgunfmtmsggrepmsgconv

Extract translatable strings from C source code$ xgettext -o messages.pot myprogram.c

Compile a message catalog (.po) to binary format (.mo)$ msgfmt -o translations.mo translations.po

Merge updated source strings with existing translation file$ msgmerge -U translations.po messages.pot