When you answer a negative question in Spanish you usually use the word no twice?

Double negatives are a fact of life in Spanish, and can be very uncomforatble for an English speaker. In answering a question in a negative, usually one would say "No", followed by an explanation. Example: "¿Quieres Ir al cine conmigo?" (Do you want to go to the movies with me?) might be answered "No. No me gusta la película." (No. I don´t like the film."

The first "no" answers the question. The second is turns "me gusta" into the negative.

This is very common useage in Spanish. Many other things that are answered as a positive in English are used as a negative in Spanish. Example: "no sabes nada." Literally, this is "you don´t know nothing". It would be translated normally as "you don´t know anything".