Operation and possibilities of the program

[Klain]

Thank you very much for your questions. I copied the ServerBundle_de.defaults and made the changes in the file, then renamed this file to ServerBundle_de.properties and finally copied it to the folder on the Synology NAS. I did not change the English language file. After this change, the above mentioned problem occurred. This makes navigation through the music files more difficult.
I do not understand what you mean by "control point".
I achieved the German-language display by setting the language output in German in the "Control Panel" under "Regional Options".