A PO file contains translated strings for the user interface in various languages. These translation files map string keys to translated texts. PO files are text documents that can be edited. They have unique identifiers for each string, the original words, and translated words. Software developers use PO files to add support for multiple languages.
To open these files, use software like PHP or a text editor. PO files help programmers translate interfaces so users worldwide can understand applications in their language. Drupal sites have many PO files for each language. These import translations into the database.
GNU gettext tools create most PO files. These contain interface translations referenced by software. PO files are portable text objects for properties like user interface terms. Java, gettext, other programs read these files for translations. Users view contents in text editors as human-readable documents.
iPhone and Android devices, Windows, Macs and Linux support PO files on desktops and mobile devices. Most are developer files, rarely disk images. They allow multilingual additions to code. PO files lack plural form support compared to resx. Online editing compatibility benefits PO.