Translation of Dekadenz

Mr. Chang informed me that you have a customer that requires similar applications to what my customers have here in Switzerland. I am planning my next trip and I will consider visiting you too.
In my next message to you I want to write everything in German. Than I will rewrite it in English and we can compare the output. This way you see the text in your mother tongue and in a foreign language.
In order to see it you have to complete a lesson. I attached a screenshot. I did not place any rating there, so that it will not demotivate some of the users, especially the fresh beginners.