You can download the Dutch languagefiles for the latest builds here:
http://members.home.nl/van.raak/86497Nederlands.zip http://members.home.nl/van.raak/86498Nederlands.zip http://members.home.nl/van.raak/86499Nederlands.zip
(right click on the link, and choose 'Save target as')
Edited 27-6:
If you downloaded Dutch language-file 499 version earlier:
Now a new/improved 499 languagefile is available at above link!
Just replace the existing file "Nederlands.lng" in BSPlayer's (sub)map "Lang" by the one provided by the link above (after having it "unzipped" of course).
Note: the new version 499 is also suited for build 500!
:lol: