1- Add Text Domain and Domain Path to header:
/**
* Plugin Name: Bookstore
* Description: A plugin to manage books
* Version: 1.0
* Text Domain: bookstore
* Domain Path: /languages
*/2- Load the Text Domain in Plugin Code
In your main plugin file (e.g., bookstore.php):
add_action('plugins_loaded', function() {
load_plugin_textdomain('bookstore', false, dirname(plugin_basename(__FILE__)) . '/languages');
});
3- Generate the .pot File
create folder “languages” in your plugin . e.g wp-content/plugins/bookstore/languages
cd to the wp-content/plugins/bookstore path and run cli command: wp i18n make-pot . languages/bookstore.pot
4- Create bookstore-fa_IR.po manually in the folder “languages” and write your translations:
msgid ""
msgstr ""
"Content-Type: text/plain; charset=UTF-8\n"
"Language: fa_IR\n"
"Plural-Forms: nplurals=1; plural=0;\n"
#: includes/admin-page.php:10
msgid "Book Title"
msgstr "عنوان کتاب"
#: includes/admin-page.php:11
msgid "Author"
msgstr "نویسنده"
#: includes/admin-page.php:12
msgid "Price"
msgstr "قیمت"
5 – Compile .po to .mo
cd to languages path and run cli command: msgfmt bookstore-fa_IR.po -o bookstore-fa_IR.mo
Maybe you need to install gettext GNU : sudo apt install gettext (without gettext, the msgfmt won’t work).