When you move content/widgets which have translation, their translated versions are automatically moved across the stages along with the original content.
For example, if you move a Flow from the Draft to the Ready stage, its translated version is also moved from Draft to Ready. For more information, see Translate Whatfix Content.
Edit the translated content the same way you edit other content. For more information about editing content in production, see Edit Whatfix content or widget in Production stage.