• Click on the Home icon (house) in the Google Home app and then click on ‘Settings’. 
  • Scroll to the Google Assistant Services tab and click on ‘More Settings’. 
  • Under your email address click on ‘Assistant’ and then on ‘Languages’ to speak to the Assistant. 
  • You can then add one or more languages.

NOTE: Some features will (first) only be available in English. Combining different languages may cause the Google Assistant to misunderstand you.