Translation of rationalism in Spanish

So you have taken a German course in the Ghoete Institute. Well, I certainly learned something with you, and your German is already a lot better than last time. I think we really did it.
Well, you're already here ... would you ever have thought that I'm a member in facebook? You are a funny guy. What else is happening? Did you already settle down in your new country of choice?
I have problems with adjectives, endings and articles. The grammar is so difficult. I am very happy to learn Spanish with you. What went wrong with the lessons? Thanks and best regards.