For dutch content on Usenet, I can strongly recommend Spotnet. If you are familiar with docker, you will find a turnkey solution here to get you going with spotnet.

Short explanation (from Wikipedia): “Spotnet is a protocol on top of Usenet, providing a decentralized alternative to usenet indexing websites, and the NZB format in general. Spotnet allows users to create and browse private ‘newsservers’, or decentralized repositories of files and information. Members share spots (file sharing) with one another, similar to the seeding process in torrent sharing”.

Maybe you can try The Lounge? It is somewhat different than an IRC proxy since it has a web client (that is always connected)