Formal:
* Laku noć (pronounced LAH-koo NOTCH) - This is the most common and formal way to say goodnight.
Informal:
* Dobro jutro (pronounced DO-broh YOO-troh) - This literally translates to "good morning" but is used as a casual way to say goodnight to friends and family.
* Laku noć - This is also used informally, but it's slightly more formal than "Dobro jutro".
* Dobro veče (pronounced DO-broh VEH-cheh) - This literally translates to "good evening" but can be used as a casual way to say goodnight in the evening.
* Prijatno (pronounced PREE-yat-noh) - This literally translates to "pleasant" and is used as a casual way to say goodnight.
Other options:
* Slatki snovi (pronounced SLAH-tkee SNO-vee) - This means "sweet dreams" and is a more affectionate way to say goodnight.
* Lepu noć (pronounced LEH-poo NOTCH) - This means "beautiful night" and is a more poetic way to say goodnight.
The best way to choose the right greeting is to consider your relationship with the person you are talking to and the context of the situation.