Internationalization makes your plugin accessible to global users. Wrap all user-facing strings with translation functions like esc_html__ and _e. Set a unique text domain matching your plugin slug. Load translations using load_plugin_textdomain in the init hook. Use wp i18n make-pot to generate POT files from your code. Translators use these files to create language-specific translations. Support RTL languages by enqueueing RTL stylesheets when appropriate. Avoid concatenating translated strings, use sprintf for dynamic content. The translate.wordpress.org platform facilitates community translations. Internationalized plugins reach wider audiences and respect cultural diversity.