A:Answer I personally never tried Spanish books. but I searched amazon, they said voyage support spanish book.
Quote from amazon:
"Set your default device language to one of the following languages: English (U.S., UK), German, French (France, Canada), Italian, Spanish (Spain, Mexico, Argentina, Chile, Colombia), Portuguese (Brazil), Japanese, Chinese (Simplified), Russian, and Dutch. Help for Kindle Voyage (7th Generation), Kindle Paperwhite (7th Generation), Kindle (7th Generation), and Kindle Paperwhite (6th Generation)."