I have followed the guidelines on the website to create a Dutch translation of Luma. It's based on the svn trunk head.
There are some minor issues with the translation, but it should be 99% ok.
Attached you will find the ts and qm file for this translation (it wasn't clear which one I should have sent, so I send both).
As this is a new language in Luma, there are also some minor code changes required to include this new language. I have also added a diff containing these changes.