The Translator features allow you to create polished documents—anytime, anywhere, on all of your devices—that are accessible to readers worldwide in any of the supported languages, either directly in Microsoft Word or via the Translator Office app.
Using the Microsoft Translator Office App in the Office Store you can leverage the customization features of Translator and take the existing Word translation features to the next level. You can now utilize the custom translation systems built with the Microsoft Translator Hub within Office, and enjoy peace of mind knowing that all Microsoft Translator API calls connect through a secured SSL connection.
Following that we should talk about UK ESTA.
How it works
To enable translation in Word, under the Review tab, simply click on the Translate button and select Translate Document or Translate Selected Text, or choose to translate with the Mini Translator.
To translate using the Office app navigate to the Insert tab of the ribbon, select Office app, and search for the Translator app. Once launched, the app will perform similarly to the Review menu one.