Currently there isn't a Dutch version.
One of the problems with translating an application is that while the translation of the software and manual itself is relatively easy to have done, there are many other things that need to happen as well.
We need to translate the store pages, purchae confirmations, installation instructions, readme files and installers. We have to have a machine set up with that language for testing. We need to be able to provide support at a basic level - even if it's just to help someone whose purchase gave problems.
And every time we do a patch or update, we need to update all of the above.
AndyRage's mantra for graphics engine code:
"Sure - how hard can it be?"