@robierzo
Open Narrator Settings by pressing the Windows logo key + Ctrl + N.
Under Personalize Narrator’s voice, select Add more voices. This will take you to the Speech settings page.
Under Manage voices, select Add voices.
Select the language you would like to install voices for and select Add. The new voices will download and be ready for use in a few minutes, depending on your internet download speed.
Once the voices for the new languages are downloaded, go to Narrator settings, and select your preferred voice under Personalize Narrator’s voice > Choose a voice.