Translation of lunatic in Spanish

Since my wife is pregnant, we must postpone the trip until tomorrow. I am back again in Poland in June and then I would be very happy to meet you. I will email the exact dates a little later.
I would also need to know whether pricing can be different, because otherwise that amount would be too high. Some of the translations are not accurate at all and would also need corrections so that the dictionary displays only correct words.
I do not teach Spanish, but geography and history at a school here in Frankfurt. It is good to live for a year in another country. I would be glad to receive a picture of you.