as there are many dialects in the netherlands (also called Holland) they all speak, write and read dutch next to their dialect. so a special board for dialects is noncense, and not only in the netherlands.
as for the dutch; altho we only are a very small percentage of the world inhabitants, they represent around 5% of all the residents in SL.
it's thru that most of the dutch speak a fair bit of englich, and most are able to find their way in an english forum,
But there are still a lot who have difficutlies in understanding the sometimes complex english posts here. (And google ttranslate wont help them either, it s#cks for the dutch...)
for them a dutch forum here would be helpfull.
But in the meantime, it is possible for those less-multilanguage, to find a good site for their dutch questions and answers in the dutch communityforum www.nlforumsl.nl (also for the dutch-speaking belgium!)