Go on as much as you like and when you are ready, tap the SMS or Email button. It will then go to the phone's default SMS or Email service, from where you can add the recipients. The same can be sent via Whatsapp as well. Just tap the Whatsapp logo and on next screen, you can select the contact to whom message is to be sent.
Note: You must be connected to the internet to use Google Voice service, if you don't have the offline language pack downloaded in your device. Data rates may apply in that case.