WP WPML address content by language

wpml_wp_query.php

<?php
/**
 * Update ACF relation field "things" for all event posts based on WPML language
 * Sets 6526 for English posts and 6240 for Czech posts
 * 
 * @param string $lang_code Language code ('en', 'cs', or 'any' for all languages)
 */
function helper_update_events_things_field($lang_code = 'any') {
    // Store the current language to restore later
    $current_lang = apply_filters('wpml_current_language', null);
    
    $languages_to_process = ($lang_code === 'any') ? ['en', 'cs'] : [$lang_code];
    
    $total_updated = 0;
    $total_skipped = 0;
    
    foreach ($languages_to_process as $language) {
        // Switch to the specific language context
        do_action('wpml_switch_language', $language);
        
        // Get all event posts in this language
        $events = get_posts([
            'post_type' => 'event',
            'post_status' => 'any',
            'posts_per_page' => -1,
            'fields' => 'ids',
            'suppress_filters' => false
        ]);

        if (empty($events)) {
            echo "No event posts found for language '{$language}'.\n";
            continue;
        }

        echo "Found " . count($events) . " event posts for language '{$language}'. Updating 'things' field...\n";

        // Set the appropriate ID based on language
        $things_id = ($language === 'en') ? 6526 : 6240;

        foreach ($events as $event_id) {
            // Update the ACF field with array of IDs
            $updated = update_field('things', [$things_id], $event_id);

            if ($updated) {
                echo "  - Post ID {$event_id} ({$language}): Set 'things' to [{$things_id}]\n";
                $total_updated++;
            } else {
                echo "  - Post ID {$event_id} ({$language}): Failed to update or no change needed.\n";
                $total_skipped++;
            }
        }
    }
    
    // Restore the original language
    if ($current_lang) {
        do_action('wpml_switch_language', $current_lang);
    }

    echo "\nCompleted: {$total_updated} updated, {$total_skipped} skipped.\n";
}