I have a problem with translating another mail though. It is the cart abandonment recovery mail. This mail is generated from the WooCommerce Cart Abandonment Recovery plugin. The page where this mail can be edited is found here: hidden link
I'll advise to contact the plugin author and ask for a compatible solution.
Theme and plugin authors are welcome to join WPML’s Go Global program, which helps theme and plugin authors make their code multilingual ready. Together with WPML’s compatibility team, they can test and confirm that their theme or plugin works with WPML. See https://wpml.org/documentation/support/go-global-program/ for details and you can refer your theme/plugin provider to this as well.