Languages Most Similar to Croatian

Can you guess which languages have the highest level of similarity to Croatian (in written form)? Good luck!
Only includes languages which are official in at least one country.
Index on a 0 to 100 scale with lower numbers indicating higher similarity.
Quiz by
baptistegorce
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Last updated: November 23, 2022
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First submittedNovember 23, 2022
Times taken269
Average score90.0%
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Index
Language
2,8
Serbian
5,6
Russian
8,3
Ukrainian
10,2
Slovene
10,7
Polish
11,6
Bulgarian
12,4
Belarusian
12,9
Czech
13,3
Slovak
13,9
Macedonian
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3 Comments
+3
Level 14
Nov 23, 2022
that was a nice quizz, hope there will be more of that type
+2
Level 57
Nov 23, 2022
Thank you very much, glad to read it! Many more should come out during the few next weeks. You also already have nearly 20 other quizzes published in this series, btw.
+1
Level 78
Aug 5, 2025
Interestingly, as a native Croatian speaker, I'd say that the other Slavic languages are intelligible to me in this order:

1. Serbian (might be considered the same language as well as Bosnian and Montenegrin)

2. Slovene

3. Slovak

4. Bulgarian

5. Macedonian/Czech

6. Russian/Polish/Ukrainian

I didn't have enough exposure to Belarussian language to judge it, though.