Hi!
We have just finished our new forums! They are available in multiple languages (English and German at the moment) and due to them being custom-made they offer more/different possibilities than the Steam forums, first and foremost the support for multiple languages. It's also easier to find our posts because they are highlighted.
On Steam, most people ended up using the General discussion forum because it's the one that comes up when you click on Discussions. We fixed this by adding a forum overview with all forums and their descriptions. We also added a lot more forums than on our Steam discussion board.
We will look into the Steam forums from time to time, but we highly recommend using our new forums at forums.cubeuniverse.net.
There will be some updates to the forums - a better design, notifications etc. - but not before the launch of the quest update.