Oh, and a US publisher publishing it in Spanish might be a tough call to order.
I'm not knowledgeable about the marketplace over in the US, but at a guess I'd say 95% or more of US publishers only publish in English. (That's pretty much how it works in Australia, if bookstores are anything to go by...)
Don't quote me on that - it's just a guess. But I imagine not too many of them would publish in another language, especially if it's an original publication, and isn't being based on previous success. The exception to the rule would probably be "Learn To Speak X" type books, where there's an English translation of the foreign language with the purposes of learning to speak a new language.
Anyway, good luck. Hopefully someone else can come along and offer up more information than I've got.