fix(wpml): correct product permalinks for WPML translated products

autoload.php

@@ -5,6 +5,7 @@
 require __DIR__ . '/includes/forms/functions.php';
 require __DIR__ . '/includes/forms/admin-functions.php';
 require __DIR__ . '/includes/integrations/functions.php';
+require __DIR__ . '/includes/integrations/wpml-ecommerce.php';
 
 spl_autoload_register(function ($class) {
     static $classmap = [

includes/default-filters.php

@@ -15,3 +15,7 @@
 mc4wp_apply_deprecated_filters('mc4wp_merge_vars', 'mc4wp_form_data');
 mc4wp_apply_deprecated_filters('mc4wp_form_merge_vars', 'mc4wp_form_data');
 mc4wp_apply_deprecated_filters('mc4wp_integration_merge_vars', 'mc4wp_integration_data');
+
+// WPML: fix product permalinks in ecommerce data synced to Mailchimp
+add_filter('mc4wp_ecommerce_product_data', 'mc4wp_wpml_ecommerce_product_permalink');
+add_filter('mc4wp_ecommerce_product_variants_data', 'mc4wp_wpml_ecommerce_product_variants_permalink');

includes/integrations/wpml-ecommerce.php

@@ -0,0 +1,73 @@
+<?php
+
+/**
+ * WPML compatibility for Mailchimp ecommerce product permalinks.
+ *
+ * When WooCommerce products are synced to Mailchimp via the ecommerce module,
+ * the product URLs may not include the correct WPML language context, causing
+ * translated products to link to the default language version.
+ *
+ * These functions hook into the ecommerce product data filters to ensure
+ * product URLs are generated with the correct WPML language.
+ *
+ * @since 4.11.2
+ * @see https://github.com/ibericode/mailchimp-for-wordpress/issues/775
+ */
+
+defined('ABSPATH') or exit;
+
+/**
+ * Fixes the product permalink for WPML translated products.
+ *
+ * Hooks into the ecommerce product data filter to replace the product URL
+ * with the correct WPML-translated permalink.
+ *
+ * @since 4.11.2
+ *
+ * @param array $data Product data array containing 'id' and 'url' keys.
+ * @return array Modified product data with corrected URL.
+ */
+function mc4wp_wpml_ecommerce_product_permalink($data)
+{
+    if (!defined('ICL_SITEPRESS_VERSION')) {
+        return $data;
+    }
+
+    $language = apply_filters('wpml_element_language_code', null, [
+        'element_id'   => $data['id'],
+        'element_type' => 'product',
+    ]);
+
+    $data['url'] = apply_filters('wpml_permalink', $data['url'], $language);
+
+    return $data;
+}
+
+/**
+ * Fixes the product variant permalinks for WPML translated products.
+ *
+ * Hooks into the ecommerce product variants data filter to replace each
+ * variant URL with the correct WPML-translated permalink.
+ *
+ * @since 4.11.2
+ *
+ * @param array $variants Array of variant data arrays, each containing 'id' and 'url' keys.
+ * @return array Modified variants data with corrected URLs.
+ */
+function mc4wp_wpml_ecommerce_product_variants_permalink($variants)
+{
+    if (!defined('ICL_SITEPRESS_VERSION')) {
+        return $variants;
+    }
+
+    foreach ($variants as $key => $variant) {
+        $language = apply_filters('wpml_element_language_code', null, [
+            'element_id'   => $variant['id'],
+            'element_type' => 'product',
+        ]);
+
+        $variants[$key]['url'] = apply_filters('wpml_permalink', $variant['url'], $language);
+    }
+
+    return $variants;
+}