Wow, Amazon has just opened both the Kindle Store and Kindle Direct Publishing in Spain and Italy.
This means that people in those countries can self-publish their ebooks to the Amazon ecosystem and it also means that existing self-publishers on Amazon KDP, including folks in the US, will receive 70% of royalties from sales in Spain and Italy (as well as San Marino, Vatican City, and Andorra). Up until now, only sales to customers in Austria, Belgium, Canada, France, Great Britain, Guernsey, Germany, Isle of Man, Jersey, Lichtenstein, Luxembourg, Monaco, Switzerland, and the US received royalties of 70% (sales to customers in other countries only receive 35%)
Amazon has translated most of the self-publishing help files into Spanish and Italian, simply click on the language button at the top of the Kindle Direct Publishing site:
I would recommend going carefully through the legal and tax information. Amazon recommends taking advantage of the tax treaties between countries in order to avoid double-taxation. Such a tax treaty exists at least between Spain and the US, I'm not sure about Italy.
For starters, Amazon says there are 22,000 books in Spanish for Kindle on the Amazon Kindle store. And I just found 1028 Kindle books in Catalan, 68 books in Galician, and 138 in Basque. There are 16,262 in Italian. Amazon says in its documentation that it only allows books in Spanish, French, German, English, Portuguese, and Italian, but that clearly is not the case, at least not for big publishers.
Too bad I can't buy any of them. Looks like you have to have an account on Amazon.es in order to buy them. That's pretty ridiculous, this is the perfect opportunity for a small publisher to reach out to the world. My books published in the US are available on Amazon.es, now I would like to see those Catalan books available on Amazon.com. Please?