Design Studio API
Email link and publish
A Design Studio email doesn't send anything on its own. You link it to a single workflow, like an email action in an automation, a one-time send, a transactional message, or an API-triggered broadcast. Then you publish to push your updates from Design Studio to that workflow.
Publishing covers the default language and every translation. Multi-language publishes run in the background; poll publish status to see when they finish, and check for unpublished changes to find out whether the linked workflow is behind the draft.