This is not Adobe, so my reply is from a user of the English version.
I believe that what you want to do depends on the language version you purchase. Have you contacted
the Adobe Sales people in your area about this matter?
In the English version that I have, during installation, there is an opportunity to set the language. If the language has been set and I
decide I want a different language, I uninstall the program and reinstall it selecting the language that I now want.
I do not believe you would have that choice in a special language version. I am not sure. See what the Adobe Sales people in your
area have to say about this. It might be to your advantage to buy the English language version and then set the language to German
during the installation.
Many thanks for the advice i have tried to contact the salesman but haven't got yet aswer if it is a German version. But i think i should buy the English one to be sure.
Thanks again, Juho