[Resolved] Products in secondary languages imported via Facebook for WooCommerce. Why?

Hi Itamar, I’m briefly reopening the thread to let you know that we’ve resolved the issue – although we had to modify your code to get it working properly.

Here’s a quick summary from our developer:

The original logic and the wc_facebook_is_product_sync_enabled hook could theoretically have worked – although it seems more suited to global synchronisation – but the implementation references a non-existent function, which caused an error as soon as the filter was activated.

After further investigation, we found another hook - wc_facebook_should_sync_product – which seemed more appropriate for our use case. We tested and implemented it, adding a small optimisation: to avoid repeated database queries, the default language is determined only once per request and reused for any subsequent calls.

When opening the backend of a product in English (a secondary language), the check now correctly identifies that the product should not be synchronised, and avoids running redundant checks within the same page load.

On the backend, viewing a product in the primary language shows no changes (Facebook for WooCommerce notifications and Meta product details remain visible). But when switching to a secondary language, the notification is no longer shown and the metabox updates accordingly.

Based on all this, it seems the modification is working as expected.

Thanks again for your support and availability!

add_filter( 'wc_facebook_should_sync_product', function( $should_sync, $product ) {
       static $products;
       static $default_lang;

       if ( ! isset( $products ) ) {
           // Initializing static variable
           $products = [];
       } elseif ( \in_array( $product->get_ID(), $products ) ) {
           // Sync already stopped for this product
           return false;
       }

       if ( ! isset( $default_lang ) ) {
           // Getting standard lang only one time per hit, thanks to the static variable
           $default_lang = apply_filters( 'wpml_default_language', null );
       }

       // Getting product lang and checking...
       $product_lang = apply_filters( 'wpml_post_language_details', null, $product->get_ID() );
       if (
           $default_lang
           && is_array( $product_lang )
           && isset( $product_lang['language_code'] )
           && $product_lang['language_code'] !== $default_lang
       ) {
           // Avoiding later checks in the same hit
           $products[] = $product->get_ID();

           // Stopping sync for this product
           return false;
       }

       // Nothing done
       return $should_sync;
   }, 10, 2 );