Switch between displaying the Variation Slug and the Variation Name/Label in the Checkout Form widget.

On the checkout page, the "Checkout Form" widget displays the Variation Slug in the Cart Items. I would like it to show the Variation Name/Label instead. Using Chinese Slugs causes the Variation Swatches in Sellkit to malfunction (see Support Tickets #4559 for details). However, the checkout page can only display Slugs, putting me in a dilemma as my target customers are Chinese users.