What languages are spoken by the staff or volunteers at the windmill?

Quick answer

Primarily Dutch; English is often spoken by volunteers.

The volunteer millers at the New Nijmegen Windmill primarily speak Dutch. As Nijmegen is an international city and many Dutch citizens have good English language skills, it is very common that at least some of the volunteers will be able to communicate effectively in English. For other languages, communication might be more challenging, but often, the visual experience of the mill conveys much of its story.