Before 1991 the language was generally called Serbo-Croatian and taught as one. It is now four official languages in four countries. Nothing about the underlying speech changed in that period, which tells you the dispute is not really a linguistic one.
What actually differs
| Dimension | Difference |
|---|---|
| Mutual intelligibility | complete — no study required |
| Grammar | essentially identical |
| Alphabet | Serbian uses both Cyrillic and Latin; the rest use Latin |
| Vocabulary | some systematic preferences, mostly in modern coinages |
| Pronunciation | the ije/e split, shared unevenly across borders |
| Loanwords | Croatian tends to coin natively; Serbian accepts internationalisms |
The ije and e split
The most systematic difference is a historical sound that developed differently by region. It does not follow national borders neatly — Bosnian Serbs use the ijekavian forms too.
| Ijekavian | Ekavian | English |
|---|---|---|
| mlijeko | mleko | milk |
| dijete | dete | child |
| vrijeme | vreme | time, weather |
| lijep | lep | beautiful |
| rijeka | reka | river |
Ekavian is standard in Serbia; ijekavian in Croatia, Bosnia and Montenegro. Both are understood everywhere without effort.
Vocabulary preferences
| English | Croatian tendency | Serbian tendency |
|---|---|---|
| train | vlak | voz |
| bread | kruh | hleb |
| thousand | tisuća | hiljada |
| football | nogomet | fudbal |
| university | sveučilište | univerzitet |
| aeroplane | zrakoplov | avion |
The pattern in the bottom rows is deliberate: Croatian standardisation has favoured native coinages where Serbian accepts international borrowings. Most speakers know both members of each pair and simply regard one as the other side's word.
Serbian is genuinely digraphic. Serbian is written in both Cyrillic and Latin, and both are official. Street signs, newspapers and websites use each freely, and educated speakers read both without noticing the switch. The two alphabets correspond letter for letter, so learning the second is a short exercise rather than a project.
The grammar you will actually be learning
Whichever standard you choose, the system is the same: seven cases, three genders, and Slavic verbal aspect.
| Case | Job | grad (city) |
|---|---|---|
| Nominative | subject | grad |
| Genitive | possession, after many preps | grada |
| Dative | indirect object | gradu |
| Accusative | direct object | grad |
| Vocative | address | grade |
| Instrumental | with, by means of | gradom |
| Locative | location, after preps | gradu |
There is also pitch accent — syllables carry rising or falling tone as well as length — which is standard in descriptions of the language and widely simplified in actual urban speech. Learners are not usually expected to master it.
What to choose
Pick the standard of the place you care about, and stop worrying about the rest. Materials are most plentiful for Serbian and Croatian; Bosnian and Montenegrin standards are closely aligned with them.
Learning one gives you all four in practice. The differences you will absorb over time are of the kind that separate lift from elevator — real, noticeable, and never an obstacle to being understood.
Look up Serbian offline
The free English-Serbian Dictionary covers the shared vocabulary that runs across all four standards. Works with no connection.
Open the dictionary appFrequently asked questions
Are Serbian and Croatian the same language?
Linguistically they are standard varieties of one language, mutually intelligible without any study — closer than British and American English in grammar, further apart in some vocabulary. Politically and officially they are separate languages, and both descriptions are defensible depending on which criteria you apply.
Which alphabet should I learn?
Both if you are learning Serbian, which uses Cyrillic and Latin interchangeably. Croatian, Bosnian and Montenegrin use Latin primarily. The Serbian Cyrillic alphabet maps one-to-one onto the Latin one, so learning the second costs very little once you know the first.
Does learning one let me use the others?
Yes, essentially. Speakers of all four communicate without difficulty. You will pick up some vocabulary preferences and a few grammatical habits specific to one standard, and switching between them is a matter of adjustment rather than relearning.