A workflow for translating the customer account and login experience — sign-in, order history, and account settings — so returning customers stay comfortable in their language.
A sign-in page in the wrong language is an instant credibility hit for a returning customer who already bought from you.
Labels, buttons, order status, and error messages all need translating; missing even a few leaves a jarring mixed-language experience.
A comfortable, localized account area encourages repeat orders; a confusing one sends buyers to a competitor.