As mentioned in this article, we apply original item promotions to the price of translated items. A "double-discount" may occur when a seller applies a promotion on all or a group of items, including items listed by WebInterpret.
Since translated item prices already take the discount into consideration, a promotion applied to one of our listings will result in a "double-discount", so to speak.
To prevent this, sellers should not apply promotions to their inventory on a global scale as it affects WebInterpret items as well. If you still intend to use a global promotion, please contact us with information on when you intend to apply the promotion so we can modify your international listings with a global revision.