ISPConfig is a good example of how open source software can be.
Although it's quality, a lot of parts of the userinterface are not translated into the Dutch language.
As a satisfied user of ISPConfig here is my contribution to the ISPConfig team: a complete new Dutch userinterface
The Dutch language package can be downloaded and installed via the update manager within ISPConfig.
Before performing an update, please read the readme file first.
The package itself can be downloaded at the Downloadpage of my website
As described on my website, i am also busy to translate the official documentation into Dutch. This is still in progress, be patient please.