Dans includes/modules/sideboxes/whats_new.php il faut ajouter dans la requête
and pd.language_id = '" . (int)$_SESSION['languages_id'] . "'// $display_limit = zen_get_products_new_timelimit();
$display_limit = zen_get_new_date_range();
$random_whats_new_sidebox_product_query = "select p.products_id, p.products_image, p.products_tax_class_id, p.products_price, pd.products_name,
p.master_categories_id
from (" . TABLE_PRODUCTS . " p
left join " . TABLE_PRODUCTS_DESCRIPTION . " pd on p.products_id = pd.products_id )
where p.products_id = pd.products_id
and pd.language_id = '" . (int)$_SESSION['languages_id'] . "'
and p.products_status = 1 " . $display_limit;