Hi Federico, Greg is here (an Independent advisor).
Below you’ll find a method to follow.
1)Move to Start, then select Settings and Time & Language.
2)On the left pane, click on Language and press Add Language on the right pane.
3)Follow the link to the article on how to Install language Language packs and install it: https://support.microsoft.com/en-us/help/14236/...
4)Once installed, click on it to view the following options: Set as default, Remove. Click on Set as default.
5)Follow the instructions from the article and change your display language: Manage your input and display language settings in Windows 10. https://support.microsoft.com/en-us/help/402767...
6)Sign out of your user account and sign in back again.