The integration of formative practice questions with textbook content is a well-known method for increasing student learning, and recent advances in artificial intelligence have made automatic question generation a viable option for scaling this learning method to thousands of textbooks. To expand this method to even more students, a parallel construction approach was developed to utilize the question generation process in English to create questions for other languages, such as Spanish. However, validation of the Spanish questions by native speaking subject matter experts is a necessary step to ensure the questions generated through parallel construction are of the same quality and suitable for educational purposes. In this paper, questions were generated via parallel construction for six Spanish textbooks and evaluated by subject matter experts teaching those subjects at major universities in Mexico and Argentina. Results from this review are discussed and implications for future use and research outlined.