When using Wordpress in a language different than English, I always notice that one single string appears untranslated; the "Apply Coupon" button on the Cart page. Upon examining I noticed that this string is registered to the "x" text domain, whereas all other strings are registered as "woocommerce" and are therefore showing translations automatically.
Therefore, I was hoping you could adapt the cart template to register this string to the WooCommerce domain (the text "Apply coupon" is already available in this domain, albeit with a capitalization difference but that could be solved easily with a text-transform:capitalize;). This small change would save me a lot of work, as I currently need to translate this single string on every website I build. I can imagine a lot of users of X and Pro that build non-English websites have experienced this too.