Amazon is now selling “eBooks Kindle en Español” in the Tienda Kindle. This will include titles written in Spanish originally as well as translated titles. These Spanish language titles are aimed at the large Spanish speaking population in the United States and thus are available in the United States.
Spanish speakers can set their Kindle and Kindle apps to Spanish language and shop for titles in their language, as well as access the social features in the Kindle in Spanish.
Amazon also has some new Spanish language customer service pages including a phone number and email support in Spanish.