Integrates the Random Post on Refresh plugin with Polylang to restrict queries to the current language.

random-post-on-refresh-polylang.php

<?php
/**
 * Plugin Name: Random Post on Refresh – Polylang Integration
 * Plugin URI: https://gist.github.com/wpscholar/215695a02a495194d7f7f8da2f46d519
 * Description: Integrates the Random Post on Refresh plugin with Polylang to restrict queries to the current language if none is explicitly provided.
 * Version: 1.0
 * Author: Micah Wood
 * Author URI: https://wpscholar.com
 * License: GPLv2
 * License URI: https://www.gnu.org/licenses/gpl-2.0.html
 */

add_filter( 'random_post_on_refresh_query_args', function( $query_args ) {
    // Skip if the lang attribute is already explicitly set
    if ( ! empty( $query_args['lang'] ) ) {
        return $query_args;
    }

    // Only apply if Polylang is active
    if ( function_exists( 'pll_current_language' ) ) {
        $current_lang = pll_current_language(); // Returns slug like 'en', 'fr', etc.
        if ( $current_lang ) {
            $query_args['lang'] = $current_lang;
        }
    }

    return $query_args;
} );