Hi. My name is Steve. I am one of the Kindle experts here.
I can't take a phone call right now so if you see prompts for that, understand that it is the site, not me, that is sending those phone suggestions to you.Since you can't read the language that the Kindle is already in, we can do it by counting the menu items. So here is how to do it.
From the Home Screen- Menu (three lines in upper right corner)- 2nd from the bot***** *****sting (Settings)- 4th Listing (Device Options)- 5th Listing (Language and Dictionaries)- 1st Listing (Language)
The Kindle will reboot and it should be in Spanish.Give that a try and let me know.Remember I am unable to take a phone call right now.Steve