Prep work for Dutch citizenship

As stated earlier I am currently in the process of becoming an official Dutch citizen. As study material before I am allowed to become a Dutch citizen, I thought it would be a good idea to learn the national anthem. It is called the Wilhelmus and goes as follows (original and translation):

Wilhelmus van Nassouwe
ben ik, van Duitsen bloed,
den vaderland getrouwe
blijf ik tot in den dood.

Een Prinse van Oranje
ben ik, vrij onverveerd,
den Koning van Hispanje
heb ik altijd geeerd.

[Listen to the song]


English translation:
William of Nassau, scion
Of a Dutch and ancient line,
I dedicate undying
Faith to this land of mine.
A prince I am, undaunted,
Of Orange, ever free,
To the king of Spain I've granted
A lifelong loyalty.