PO files are the format of the GNU gettext translation files.
PO files are the format of the GNU gettext translation files.
A PO (Portable Objects) file is made up of many entries, each entry holding the relation between an original untranslated string and its corresponding translation. All entries in a given PO file usually pertain to a single project, and all translations are expressed in a single target language.
They usually have to be compiled in MO (Machine Object) file to be used in applications.