Hello everyone, does anyone know how to change the language?
I would like to switch the German translation to the English version as I prefer Audio and Text to match. :D

This comes a little late, but might be helpful for others facing this issue.
Open the game's folder (from Galaxy client for example)
the go to the folder named app.
It has a Metronomicon.cfg file, you can open in a text editor (notepad will do).

In that file search for the line

[JVMOptions]

and insert the following beneath:
-Duser.language=en

=en will set to english
=de will set to german
=fr will set to french and so on (though im not sure if french in particular is supported by game)