maybe this helps?
https://woocommerce.com/posts/understand-and-fix-failed-order-status-in-woocommerce/#:~:text=Go to WooCommerce → Orders,number to find more information.
i just googled:
woocommere find out which orders failed and why
hey can you send your /wp-admin/ login and your ftp login and send a link to this topic and links to the pages where the language switcher does not appear to:
info@laytheme.com ?