Czech and Slovak are two closely related West Slavic languages.

They share a long history, especially during the years of Czechoslovakia.

Because of this close relationship, speakers of both languages can generally understand each other without learning the other language.

This concept is known as mutual intelligibility.

However, there are still distinct differences in their pronunciation, vocabulary, and grammar.

I’ll break down exactly how well Czechs and Slovaks understand each other and what makes these languages different.

How mutually intelligible are Czech and Slovak?

Czech and Slovak have a very high degree of mutual intelligibility.

A Czech person and a Slovak person can have a full conversation speaking their own native languages.

They’ll usually understand about 80 to 90 percent of what the other person is saying.

However, the understanding is often asymmetrical.

Slovaks generally understand Czech much better than Czechs understand Slovak.

This happens because Czech media, movies, and books are very common in Slovakia.

Many Slovak TV channels broadcast Czech shows without dubbing or subtitles.

On the other hand, Czechs are exposed to less Slovak media on a daily basis.

Younger generations of Czechs who grew up after the split of Czechoslovakia in 1993 often find Slovak slightly harder to understand.

Alphabet and pronunciation differences

Both languages use the Latin alphabet with special diacritic marks.

However, each language has a few unique letters that the other doesn’t use.

Czech is famous for the letter ř, which takes some practice for foreigners to pronounce.

Czech also uses the letters ě and ů.

Slovak doesn’t have these letters at all.

Instead, Slovak has its own unique letters, including ä, ô, ľ, ŕ, and ĺ.

Slovak pronunciation is generally considered softer and more melodic than Czech.

Czech tends to have harsher consonant clusters and a more rigid rhythm.

Vocabulary differences

Most words in Czech and Slovak look and sound very similar.

Many words are completely identical.

For example, the word for “school” is škola in both languages.

However, there are some everyday words that are completely different.

If you’re speaking to a Slovak, these distinct words are the ones most likely to cause confusion.

Here’s a comparison of a few common false friends and entirely different words.

Notice how the Slovak months follow the standard Latin calendar (like január), while Czech uses unique Slavic names (like leden).

Grammar differences

Both languages use complex grammar systems with noun cases, verb conjugations, and gender.

If you learn the grammar of one, you’ll easily grasp the grammar of the other.

However, Slovak grammar is slightly more regular and simpler than Czech grammar.

Czech has retained more archaic, older forms of word endings.

Slovak has simplified many of these noun declensions over time.

In colloquial, everyday spoken Czech, speakers often change word endings completely.

This creates a big gap between written Czech and casual spoken Czech.

Slovak doesn’t have this massive difference between the formal written language and the casual spoken language.

Which language should you learn?

If you’re trying to choose between the two, Czech is usually the more practical choice.

The Czech Republic has a larger population, a bigger economy, and more global media output.

There are also many more resources available online to help you learn Czech.

By learning Czech, you get a massive advantage across the entire region.

You’ll automatically be able to understand a lot of spoken and written Slovak.

If you want to start learning today, I highly recommend signing up for Talk In Czech.

We designed our platform to help you master Czech quickly and intuitively.

Here’s a quick example of a common Czech phrase you can learn right now.