I have now copied the content of all remaining KDevelop4 manual pages to the KDevelop5 manual including translations.
Thank you very much. I will do the second step in the following days.
The second step is done!!!!! I have updated the wiki for kdevelop 5 manual to be the same as the docbook at git. Thanks to this guy <tosky> from kdevelop chat. He showed me the history of the docbook and told which changes I have to make. ( look from 2013 -04-29 https://cgit.kde.org/kdevelop.git/log/doc/kdevelop/index.docbook ). Now We are doing the nice meat! We will update most of the docs there so I can be valid for kdevelop 5.1.2!!!! Step three starts the next days!!!