Problem: After WPML update some strings were registered as English. Solution: Go To the WooCommerce settings and change the source language for the strings.
Problem: The client has added some custom orders to the Woocommerce products at "product edit page -> Advanced -> Menu Order", and all of his languages follow this order when displaying the products list, only the French language didn't follow this order. Solution: The French language hasn't copied the menu order for most of the products, they were having "0" as their order, so when clicking the update button at the original product the issue has been resolved. Relevant Documentation: https://wpml.org/documentation/related-projects/woocommerce-multilingual/
Problem: Using custom code breaks the backend, but function correctly on the front end. This is the error message that is displayed: Fatal error: Uncaught Error: Call to a member function get_shipping_country() on null
Solution: It was suggested to the client that he test if the function/method is available before calling it.
Problem: When the admin of a WooCommerce shop changes the status from "On Hold" directly to "Processing", the customer receives an email. The items in the email (month, shipping details, and payment details), are in the default language of the shop and not in the customer language.
Solution: Update WooCommerce Multilingual to the latest version.
