Translation of diabolical in German

Sometimes you forget one word and this makes the entire sentence sound differently. That means that you need to read each email before sending it twice at least if you want to be on the safe side every time.
Usually we write these messages twice a week. We also have a fanpage in Spanish where we need to write short messages. It is actually pretty boring but people respond to it. Don't ask me why they are doing it.
Over the weekend we'll drive home and then I will tell you more about myself and my wife. If you want I can correct your text messages. Please send me the messages directly to my inbox.