I created a download page, http://pspp.awardspace.com/Translation, where a link to an evaluation copy of the dutch translation of PSPP/PSPPIRE can be found. Instructions for use are on this page. Unfortunately this doesn't work on MSWindows installations yet.
I may self are not sure if such a translation is useful as a lot of words should not be translated to avoid confusion. For instance translating words which are also used as commands makes no sense etc.
I would love to hear what people think of this, if people think it is useful etc. Other comments are welcome too.