Rank Math SEO - Product and Post primary categories are not synchronize to translations

Overview of the issue

When using the Rank Math SEO plugin, the primary category set for a product or post in the default language does not synchronize to its translations. This issue persists even if you set the rank_math_primary_product_cat custom field as copy.

Workaround

Please, make sure of having a full backup of your site before proceeding.

• Open theme’s functions.php file.
• Add the following code:

  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

  // compsupp-6580: sync primary term and primary product terms for Rank Math add_filter('get_post_metadata', 'compsupp6580_filter_the_post_metadata', 20, 4);   function compsupp6580_filter_the_post_metadata($value, $postId, $key, $single) {       $meta_keys_mapping = array(         'rank_math_primary_category'    => 'category',         'rank_math_primary_product_cat' => 'product_cat',     );       if (in_array($key, array_keys($meta_keys_mapping), true)) {         remove_filter('get_post_metadata', 'compsupp6580_filter_the_post_metadata', 20);         $value = get_post_meta($postId, $key, true);         add_filter('get_post_metadata', 'compsupp6580_filter_the_post_metadata', 20, 4);           $args     = [             'element_id'   => $postId,             'element_type' => get_post_type($postId),         ];         $language = apply_filters('wpml_element_language_code', false, $args);         $value    = apply_filters('wpml_object_id', $value, $meta_keys_mapping[$key], true, $language);           if (!$single) {             $value = [$value];         }     }       return $value; }