Top 20 Most Hardest Language in the world to learn in 2026-2027

The hardest language in the world depends on a learner’s native language, previous language-learning experience, and familiarity with different writing systems and grammatical structures. For native English speakers, languages such as Mandarin Chinese, Arabic, Japanese, Korean, and Cantonese are among the most challenging to learn.

According to the Foreign Service Institute (FSI), reaching professional working proficiency in certain languages requires up to 2,200 hours of study.

In this guide, we will understand what makes certain languages challenging and discover the top 20 hardest languages in the world to learn based on language difficulty rankings and expert research.

Hardest Language in the World to Learn: List of 20

The following list is a selection of 20 languages that may be difficult for native English speakers. This is a representative list and not a ranking as provided by the Foreign Service Institute (FSI).

Note: Navajo is included based on its linguistic complexity rather than an official FSI difficulty classification

Rank	Language	Key Learning Challenge
1	Mandarin Chinese	Tones and Chinese characters
2	Arabic	Writing system, grammar, and dialect variation
3	Japanese	Three writing systems and honorific speech
4	Korean	Grammar, sentence structure, and speech levels
5	Cantonese	Multiple tones and character-based writing
6	Finnish	Grammatical cases and unfamiliar vocabulary
7	Hungarian	Extensive suffixes and grammatical cases
8	Polish	Consonant clusters and changing word endings
9	Russian	Cyrillic script, grammatical cases, and verb aspects
10	Icelandic	Complex grammar and noun declensions
11	Vietnamese	Tones and regional pronunciation differences
12	Thai	Tones and a different writing system
13	Turkish	Vowel harmony and suffix-based word formation
14	Greek	A different alphabet and grammatical rules
15	Czech	Grammatical cases and pronunciation
16	Hindi	Devanagari script and gender-based grammar
17	Persian (Farsi)	A different script and unfamiliar vocabulary
18	Hebrew	Right-to-left writing and vowel omission in many texts
19	Serbian	Grammatical cases and two writing systems
20	Navajo	Complex verb structures and tonal distinctions

1. Mandarin Chinese (Most difficult to learn in the world)

It is commonly believed that Mandarin Chinese is the most difficult language in the world for English speakers to learn. There is no alphabet in this language, which implies that one needs to remember many characters in order to be able to read and write in it. It has nearly 1.1+ billion native speakers. Expect to spend about 2,200+ hours before reaching fluency.

Why Mandarin is difficult to learn:

Four tones
Thousands of characters
No alphabet
Complex pronunciation

2. Arabic

Arabic has about 310+ million native speakers and takes roughly 2,200+ hours to learn. The Arabic language is one of the most difficult languages to learn due to its unique script, which is totally different from all others. This language is written from right to left, and short vowels are usually not used. Moreover, speaking Arabic varies from one country to another.

Why Arabic is difficult:

Right-to-left script
Different dialects
Complex grammar
Difficult pronunciation

3. Japanese

Around 123+ million people speak Japanese. Japanese is frequently listed as one of the hardest languages to learn in the world since the language entails learning three sets of writing systems—namely, Hiragana, Katakana, and Kanji. Japanese is also distinguished by various levels of politeness depending on the context. Its learning time is approximately 2,200+ hours.

Why Japanese is difficult to learn:

Three writing systems
Thousands of Kanji characters
Honorific speech
Different sentence structure

4. Korean

The Korean language has more than 77 million speakers. And you can expect to learn Korean in 2,200+ hours.

The Korean language has gained popularity in many parts of the world because of its music and dramas, but it is among the most challenging languages to learn. The Korean language has a different grammar from the English language.

Why Korean is difficult:

Subject-Object-Verb order
Multiple speech levels
Complex grammar
Honorific system

5. Cantonese

Cantonese is a commonly spoken language in Hong Kong and other parts of Southern China. It is one of the most difficult languages in the world to learn due to its numerous tones as compared to Mandarin. Moreover, this language is spoken by about 85 million people and takes an estimated 2,200 hours for English speakers to learn.

Why Cantonese is difficult:

Six to nine tones
Character-based writing
Complex pronunciation
Fewer learning resources

6. Finnish

Finnish is hard to learn because it falls under the Uralic language group and shares very few similarities with English. It is very difficult for learners because of the complex grammar and vocabulary. Its estimated learning time is 1,100+ hours, and it has 5.5+ million speakers.

Why Finnish is difficult:

15 grammatical cases
Vowel harmony
Unique vocabulary
Complex word formation

7. Hungarian

Hungarian also belongs to the Uralic language family and uses very few words similar to English words. The language consists of long words with many suffixes, making it one of the most challenging languages to learn. Nearly more than 14 million people speak Hungarian as their native language, and the time required to learn this language is 1,100+ hours.

Why Hungarian is difficult:

18 grammatical cases
Agglutinative grammar
Complex suffixes
Unique vocabulary

8. Polish

Polish has challenges when it comes to pronunciation and grammar. The use of consonant clusters and changes in the ending letters of words makes it extremely challenging for non-native speakers. Polish has about 40 million native speakers, according to Ethnologue. Its learning time is approximately 1,100+ hours.

Why Polish is difficult:

Seven grammatical cases
Difficult pronunciation
Verb aspects
Gender-based grammar

9. Russian

Russian has about 150 million native speakers and takes an estimated 1,100+ hours for English speakers to learn. The Russian language makes use of the Cyrillic alphabet, an unknown language for many people. Besides, the nouns and adjectives in Russian have different forms based on how they are used in the sentence.

Why Russian is difficult:

Cyrillic script
Six grammatical cases
Flexible word order
Verb aspect system

10. Icelandic

Icelandic has about 370,000+ speakers (native), and you can learn this language by spending 1,100+ hours. The Icelandic language has retained many grammatical structures from the Viking Age. The language comprises complicated noun structures and extensive vocabulary, which may prove challenging for foreigners.

Why Icelandic is difficult:

Archaic grammar
Multiple noun cases
Unique vocabulary
Limited learning resources

11. Vietnamese

Vietnamese is written using the Latin script, but pronunciation is still hard since the language is tonal. It has a learning time of 1,100+ hours, and more than 85 million people speak Vietnamese as their native language. Regional dialects also vary when it comes to vocabulary and accent.

Why Vietnamese is difficult:

Six tones
Regional dialects
Pronunciation challenges
Classifier system

12. Thai

Thai has a distinctive writing system with a tonal pattern of pronunciation. The reading aspect is challenging for learners due to the lack of spacing between words in written Thai. With over 60 million speakers, Thai takes roughly 1,100+ hours of study, mostly because of its five tones and its own script.

Why Thai is difficult:

Five tones
Unique script
No spaces between words
Complex pronunciation

13. Turkish

Turkish has more than 80 million native speakers. It has grammatical logic but forms long words by attaching suffixes to a root word. You can learn Turkish by spending 1,100+ hours. There is also a unique sentence structure.

Why Turkish is difficult:

Agglutinative structure
Vowel harmony
Long words
Different word order

14. Greek

Greek uses a distinct alphabet and has a grammatical structure quite different from that of English. Noun genders and verbs have to be learned as well by students.

Why Greek is difficult:

Greek alphabet
Gender rules
Multiple cases
Complex verbs

15. Czech

The Czech language features complicated grammar and pronunciation. It utilises several cases in nouns and different forms of verbs. Czech can be learned by spending 1,100+ hours.

Why Czech is difficult:

Seven grammatical cases
Complex pronunciation
Verb aspects
Changing word forms

16. Hindi

Hindi has more than 600 million speakers (including second-language speakers). It is among the most spoken languages in the world. The students face difficulties with the Devanagari script and gender-based grammar in their initial stage of learning. You can learn Hindi with 1,100+ study hours.

Why Hindi is difficult:

Devanagari script
Gender-based grammar
Postpositions
Honorific speech

17. Persian (Farsi)

Persian is easier compared to other Middle Eastern languages; however, learning the language requires a student to learn the use of a new alphabet as well as sentence structure. This language is in the same FSI category as Russian (Category III).

Why Persian is difficult:

Arabic-based script
Different grammar structure
Formal and informal usage
New vocabulary patterns

18. Hebrew

Hebrew is spoken by about 9 million people and is estimated to take 1,100+ hours for English speakers to learn. It is a language that combines a very old alphabet with contemporary speaking. It is read from right to left, and the omission of vowels in common texts makes comprehension difficult.

Why it is difficult:

Right-to-left script
Omitted vowels
Root-based vocabulary
Gender-based grammar

19. Serbian

Serbian is spoken by 12 million people. It is unique in that it has two official scripts—Latin and Cyrillic. One must be aware of a system of grammar rules that incorporates many cases and verb conjugations.

Why Serbian is difficult:

Two writing systems
Seven cases
Complex grammar
Verb conjugations

20. Navajo

Navajo is spoken by roughly 170,000 people and is estimated to take 2,200+ hours for English speakers to learn. The Navajo language is well known for its very complex grammatical system. A verb in the Navajo language can carry as much meaning as an entire sentence in the English language.

Why Navajo is difficult:

Complex verb structures
Tonal pronunciation
Limited resources
Unique grammar patterns

FSI Language Difficulty Rankings (Hardest language to learn)

The Foreign Service Institute (FSI) groups languages by the approximate amount of classroom instruction native English speakers need to reach a target level of professional proficiency. The estimated study time is subject to the language category and the actual learning time is dependent on individual factors.

Language Category	Estimated Study Time	Examples
Category I (Easier)	600–750 hours	Spanish, French, Italian, Portuguese
Category II (Moderate)	Around 900 hours	German, Indonesian, Malay
Category III (Difficult)	Around 1,100 hours	Finnish, Hungarian, Polish, Russian, Icelandic, Vietnamese, Thai, Turkish, Greek, Czech, Hindi, Persian (Farsi), Hebrew, Serbian
Category IV (Most Difficult)	Around 2,200 hours	Mandarin Chinese, Arabic, Japanese, Cantonese, Korean
Not officially classified by FSI	No standard estimate	Navajo

Linguists believe that languages that belong to Group IV/V are the hardest languages in the world, requiring approximately 2,200 hours or 88 weeks of dedicated learning to gain professional fluency.

Note: These are not guaranteed timelines for fluency.

What Factors Affect Language Learning Time?

Several factors can influence how quickly you learn a difficult language:

Native language: Languages that share vocabulary or grammatical features with your first language may be easier to learn.
Daily practice: Consistent study and revision can help you retain vocabulary and grammar.
Learning methods: Structured classes, listening exercises, speaking practice, and feedback can improve progress.
Writing system and pronunciation: Unfamiliar scripts, tones, and sounds may require additional practice.
Learning goals: Basic conversation generally requires less study than professional working proficiency.

What Makes a Language Hard to Learn?

The level of difficulty of a language usually depends on three important aspects, which include pronunciation, writing system, and grammar. Languages that differ considerably from one’s native language tend to be more difficult.

Pronunciation Problems

There are sounds in some languages that learners may not know. Tones are the pitch levels used to say a word and can alter its meaning in tonal languages like Mandarin Chinese. In addition, Arabic has sounds that can be difficult for English speakers to pronounce correctly.

Complicated Writing System

It can take a long time to learn to read and write in a language that employs an unfamiliar writing system. In Mandarin, the learner must be able to read Chinese characters; in Japanese, they use Hiragana, Katakana and Kanji; and in Arabic, they read from right to left.

Grammar Difficulties

The hardest language in the world is characterized by complicated grammatical features. For instance, Japanese and Korean languages require different sentence structures to be used compared to English. Moreover, Arabic has plenty of verb forms that complicate the learning process.

Tips to learn most difficult langauges in the world

To master the hardest language in the world, it is important to be consistent and use the right methods.

Learn Popular Words First: Learning around 100-200 popular words and expressions will help you communicate effectively.
Practice Listening and Speaking Every Day: Consistent listening and speaking practice will make it easier to understand and pronounce words correctly.
Utilize Technology to Your Advantage: There are lots of free language learning tools on your smartphone and other online sources.
Speak With Native Speakers: Communicating with native speakers is one of the best ways to achieve fluency.
Be Consistent: It is better to spend about 15-20 minutes practicing every day rather than spending many hours once a week.
Enjoy learning.: If you don’t stress over learning a new language and simply enjoy it, the journey becomes much easier.

Conclusion ( Hardest langauge in the world)

Ultimately, the hardest language in the world varies from person to person and largely depends on your native language and learning background. However, languages such as Mandarin Chinese, Arabic, Japanese, and Korean are often ranked among the hardest languages in the world due to their complex writing systems, grammar, and pronunciation.

Although these are considered some of the most difficult languages to learn, consistent practice, patience, and the right learning approach can help anyone achieve fluency over time.

Want to start with an easier language first? Explore Kochiva‘s beginner-friendly French, Spanish, and German language courses today.

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Frequently Asked Questions (People Also Ask)

Which is the hardest language in the world?

The Mandarin Chinese language is believed to be the hardest language in the world since it has complex tonal pronunciation and script, along with other challenging features.

Which are the hardest languages in the world?

The languages that fall under the category of being the most difficult language in the world include Mandarin Chinese, Arabic, Japanese, Korean, Finnish, Russian, Polish, Icelandic, and Hungarian.

How long does it take to learn the hardest languages?

Languages that can be considered the most difficult to learn will require about 2,200 hours to reach professional-level fluency.

Is Arabic harder than Japanese?

Both these languages fall under the category of being the hardest language in the world; however, Japanese requires more effort since it has three different writing systems.