Reply To: How to translate a coupon?

[Soft79]

There is a button or checkbox somewhere in WPML String Translations to ‘Track when strings appear on the site’. You must enable it, go to your site and make sure the description is displayed on the frontend (i.e. apply the coupon) and then go back to WPML. The translation should appear now, and you can disable tracking of strings.

See https://wpml.org/documentation/getting-started-guide/string-translation/