The Hardest Languages to Learn, and Why It Depends

02/13/2026 Languages & Culture created by Saima Siddiqui

The hardest languages to learn depend entirely on the one you already speak, which is why the FSI hour estimates are so useful.

There is no single answer to which is the hardest language to learn, because difficulty is relative: a language is hard or easy mainly in relation to the one you already speak.

A useful, widely cited yardstick comes from the US Foreign Service Institute (FSI), which estimates how many class hours a native English speaker needs to reach professional proficiency in each language.

Using that framework, this guide explains what makes a language difficult, ranks the toughest for English speakers, and looks at five of the hardest in detail.

What makes a language difficult

Several things push a language up the difficulty scale: an unfamiliar writing system or alphabet, sounds that do not exist in your own language, tones that change a word's meaning, complex grammar such as heavy inflection or many verb conjugations, and above all distance from your mother tongue.

A Spanish speaker finds Italian easy and Mandarin hard, while the reverse can be true for a Chinese speaker, so any ranking is really a ranking for a particular starting point.

How difficulty is measured: the FSI framework

The FSI groups languages by the approximate class hours an English speaker needs.

Category I languages such as Spanish, French and Italian take around 600 to 750 hours. German sits a little higher at roughly 900 hours. A large middle group, including Russian, Polish, Hungarian, Greek and Hindi, takes around 1,100 hours. The very hardest tier, at around 2,200 hours, contains Arabic, Mandarin Chinese, Japanese and Korean, languages whose scripts, sounds and structures are furthest from English. It is worth repeating that these figures are for English speakers; the ranking would look different from another starting language.

Five of the hardest languages

These five are consistently singled out as tough for English speakers, with Arabic and Mandarin in the very hardest FSI tier.

Language	Family	Why it is hard
Mandarin Chinese	Sino-Tibetan	A character-based script and four tones that change meaning; the world’s most spoken language, with over 1.1 billion speakers
Arabic	Semitic	Written right to left in a 28-letter script whose letters change shape by position, plus sounds and grammar far from English, and many regional dialects
Hungarian	Uralic	Highly agglutinative, using long chains of prefixes and suffixes, with a grammar unrelated to most European languages
Polish	Slavic	A dense consonant system, seven grammatical cases and complex inflection, though its Latin alphabet helps
Russian	Slavic	The 33-letter Cyrillic script and six cases, though it is phonetic enough that reading follows once you know the letters

A little more on each

Mandarin's difficulty lies in its characters, learned individually rather than sounded out, and in four tones that must be pitched accurately, though the grammar is famously simple, with no gender, plurals or verb conjugation.

Arabic uses a 28-letter alphabet written right to left, and because letters change form depending on their position in a word, the same root can look very different in print; it is one of the six official languages of the United Nations. Hungarian belongs to the Uralic family, alongside Finnish and Estonian, and packs meaning into words through extensive suffixes.

Polish has a reputation for tongue-twisting consonant clusters and stresses almost every word on the second-to-last syllable.

Russian, developed with the Cyrillic script created in the ninth century by followers of the Byzantine missionaries Cyril and Methodius, is among the most sought-after languages to study despite its difficulty.

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Tips for learning a hard language

Knowing another language already helps, because your brain is primed to spot the patterns. Beyond that, steady motivation matters more than raw talent: consistent daily practice beats occasional cramming. And nothing accelerates a difficult language like immersion, living where it is spoken, hearing it all day and being gently forced to use it. That is exactly what a study trip abroad provides.

Summary

The hardest languages to learn depend on your first language, but for English speakers the FSI puts Arabic, Mandarin Chinese, Japanese and Korean in the toughest tier at around 2,200 study hours, with Hungarian, Polish and Russian close behind. What makes them hard is unfamiliar scripts, tones, difficult sounds and complex grammar.

None is unlearnable, though: with motivation and immersion, any of them is within reach, and a language course abroad with SPRACHCAFFE is the fastest way in.

FAQ

There is no single answer, because difficulty depends on your first language.

For English speakers, the US Foreign Service Institute rates Mandarin, Arabic, Japanese, Korean and Cantonese among the hardest.

Chiefly its distance from your own: an unfamiliar writing system, unusual sounds, complex grammar and few shared words all raise the number of hours needed to reach proficiency.

The Foreign Service Institute estimates the class hours a native English speaker needs to reach professional proficiency, grouping languages from around 600 hours to 2,200 or more.

By the FSI measure, yes. Spanish sits in the easiest group at roughly 600 to 750 hours, while Mandarin is in the hardest at around 2,200 hours, largely due to its script and tones.

Immersion shortens the road for any language, which a course abroad provides.

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