Hi Briseis, I am an editor in the World category which handles language quizzes. I will try to answer your questions, but I do have some of my own as well.
The questions in language quizzes (including Spanish) must be in English, but you can certainly include a Spanish translation. You could even ask a question in Spanish, but simply use English to set up the question. For example, you could ask:
How would you answer the following question in Spanish: "¿Cómo te llamas?"
Now for my quick question:
Is your homework to create a quiz on your own and post it here specifically, or is the assignment simply to make a quiz and you decided you would like to post it here as well? I only ask because we prefer that teachers work with us first before giving an assignment that requires a student to post their quizzes here.