Product with variations does not display variation in original language

Overview of the issue

The problem is with a product with variations not displaying variations in the original language. The translations of that product display all the variations without a problem.

Please note that this issue occurs only when the product_type taxonomy is translated. This taxonomy should not be translated at all.

Original language is the language which you originally created the product in, and then translated it from that language to other languages in your site.

Workaround

To fix this, you need to use the following steps:

1. Add the code found below to your theme’s functions.php.
2. Visit your site on the front-end and verify that the product is now correctly displayed.
3. Remove the code from the functions.php file – not doing so may result in performance issues.

    function fix_product_type_terms(){
        global $wpdb;
        //check if terms were translated
        $translations = $wpdb->get_results( "SELECT * FROM {$wpdb->prefix}icl_translations WHERE element_type = 'tax_product_type'" );
 
        if( $translations ){
            foreach( $translations as $translation ){
                if( !is_null( $translation->source_language_code ) ){
                    //check relationships
                    $term_relationships = $wpdb->get_results( $wpdb->prepare( "SELECT * FROM {$wpdb->term_relationships} WHERE term_taxonomy_id = %d", $translation->element_id  ) );
                    if( $term_relationships ){
                        $orig_term = $wpdb->get_var( $wpdb->prepare( "SELECT element_id FROM {$wpdb->prefix}icl_translations WHERE element_type = 'tax_product_type' AND trid = %d AND source_language_code IS NULL", $translation->trid ) );
                        if( $orig_term ){
                            foreach( $term_relationships as $term_relationship ){
                                $wpdb->update(
                                    $wpdb->term_relationships,
                                    array(
                                        'term_taxonomy_id' => $orig_term
                                    ),
                                    array(
                                        'object_id' => $term_relationship->object_id,
                                        'term_taxonomy_id' => $translation->element_id
                                    )
                                );
                            }
                        }
                    }
                    $term_id = $wpdb->get_var( $wpdb->prepare( "SELECT term_id FROM {$wpdb->term_taxonomy} WHERE term_taxonomy_id = %d", $translation->element_id  ) );
 
                    if( $term_id ){
                        $wpdb->delete(
                            $wpdb->terms,
                            array(
                                'term_id' => $term_id
                            )
                        );
 
                        $wpdb->delete(
                            $wpdb->term_taxonomy,
                            array(
                                'term_taxonomy_id' => $translation->element_id
                            )
                        );
                    }
                }
            }
 
            foreach( $translations as $translation ){
                $wpdb->delete(
                    $wpdb->prefix . 'icl_translations',
                    array(
                        'translation_id' => $translation->translation_id
                    )
                );
            }
        }
    }
add_action( 'init' , 'fix_product_type_terms' );