Answer:
Take one royal word in the plural and make it singular by adding one letter
What must be looked through in order to see?
What begins to die on a wedding day?
What is always coming every day, but never arrives until the next?
What body part is pronounced as one letter but written with three, only two different letters are used?
What language does a billboard speak?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?