I just visitedat your site, I like the design very much in principle, it is simple and doesn't seem overloaded.

But what immediately caught my eye is your German translation, it was 100% not translated by a native speaker, it is most likely even Google-translated. In my opinion this is very deterrent for the visitors and makes a very unprofessional impression.

If you want to offer more than one language I would take some money and have it translated by someone who speaks German as a native language. There are also enough people in the forum who offer such a thing!