I want to know the answer to the following question:
What part of speech does Dutch mostly use cases for?
All the background I'm provided with is that "The Dutch written grammar has simplified over the past 100 years: cases are now mainly used for the pronouns, such as ik (I), mij, me (me), mijn (my), wie (who), wiens (whose: masculine or neuter singular), wier (whose: feminine singular; masculine, feminine or neuter plural).". Is that enough to answer the question?
Answer: yes