How to delete a acount (italian)?
Do you want to delete (deactivate) your account, or remove a course?
To deactivate your account go to settings account, then look for the grey text that says "deactivate my account"
To remove a course, go to settings learning languages, then look for grey text that says remove/reset language.
For questions like this you can look up the answer on the WIKI
A short cute is to google Duolingo wikia deactivate account or Duolingo wikia remove course ^_^
PS to get to Settings, click your username where it appears in the blue bar at the top of the screen.