Translation of mittlerer

Are you a man or a woman? You have no picture in your profile, and I do not know whether the user name loli2938 belongs to a man or a woman, but actually it does not matter to me. I am here for the Spanish.
Therefore we use only the Vocabulix dictionary in our class. It has good features and a large vocabulary base. I will have to send you a few sentences for rewriting if that is OK with you, because the whole is mixed up.
I'm also not interested in such things, but I had a classmate who recommended the book 'Mice and Men' and that's why I bought it. It is a very interesting book and tells about old times in the U.S.