Find & control your translation history across web & app Open the Translate app and sign into your account. If there’s history stored on your device, you’ll get a notification. To find or delete your history entries before you’re prompted to sync them with your account in the cloud or delete them, tap Manage history.

​https://support.google.com/translate/answer/6142480?hl=en&co=GENIE.Platform%3DAndroid