It's kind of crazy how you jumped straight into syntax—were you ever going to give us morphology?

Overall, the word order choices seem pretty reasonable... the way your interrogative syntax is presented reminds me of how the punctuation mark "¿" was invented: to make it more obvious that a sentence was a question before you got to the end of it because the grammar gave no clues. (And this apparently required rearranging the sentence's meaning? I don't know enough about Spanish to comment. Maybe someone else can.) You might want to consider a similar way of marking questions, since I could see some examples causing that sort of trouble.