Learn Icelandic: Mig langar að borða núna.

In Icelandic, some verbs don't take a normal subject (like ég for "I"). Instead, they take a "quirky subject" in a different case. The verb langar (to want or long for) always forces the person wanting into the accusative case, so ég becomes mig. Literally, the sentence is built like "It longs me to eat now."

Does the verb langar change endings depending on who wants to eat?

No, it stays exactly the same! Because the subject is "quirky" (in the accusative case instead of the normal nominative), the verb gets frozen in its "it" form. Whether you say mig langar (I want), þig langar (you want), or hana langar (she wants), the verb langar never changes its shape.

Why is the word að used before borða?

Að acts just like the word "to" in the English phrase "to eat". When you link a verb like langar to an action in its dictionary form (the infinitive), you usually need að as a bridge. Together, að borða means "to eat".

Could I just say nú instead of núna?