Questions & Answers about Ranac mi je na leđima.
Mi is the unstressed dative form of ja (to me).
In this sentence, it does not mean to me in a literal English sense. It is a very common Serbian way to show whose body part or personal item is involved.
So Ranac mi je na leđima is literally something like:
The backpack is to-me on the back
but naturally it means:
The backpack is on my back.
This dative usage is very common with body parts and personal situations:
- Boli me glava. = My head hurts.
- Ruke su mi hladne. = My hands are cold.
- Knjiga mi je u torbi. = My book is in the bag.
So here mi marks the person concerned: my back / on me.
Because Serbian often avoids repeating possessives when the owner is already clear from context or from a dative pronoun like mi.
So:
- Ranac mi je na leđima sounds natural and idiomatic.
- Moj ranac je na mojim leđima is grammatical, but it sounds more explicit, heavier, and less natural in an everyday neutral context.
English often needs my, but Serbian often does not.