The Hardest Languages to Learn (An Honest, Evidence-Based Ranking)

What makes a language hard, and who decides

The hardest languages to learn are not hard in some absolute, cosmic sense. A language is hard for you to the degree it differs from the languages already living in your head. That is the single most important idea in this entire guide, and most viral "hardest languages" lists skip it entirely. They rank languages as if difficulty were a fixed property of the language itself, like the boiling point of water. It is not. It is a relationship between the language and the learner.

So before any ranking means anything, you have to fix the learner. This guide fixes the learner as a native English speaker, because that is who is usually asking, and because there happens to be a solid body of teaching data for exactly that case. Change the learner and the ranking scrambles. A native Korean speaker finds Japanese far gentler than an English speaker does. A native Arabic speaker learns Hebrew faster than a Spaniard would. We will come back to this, because it is the part people most often get wrong.

What actually makes a language hard for an English speaker breaks down into a handful of load points. Each of the super-hard languages we will cover stacks several of these at once, which is exactly why they sit at the top.

• Writing system. An alphabet you can learn in a week is nothing. Thousands of characters, or three scripts running at once, is a multi-year project layered on top of the actual language.
• Sound system. Tones that change a word's meaning, or consonants your mouth has never made, mean your ear and your tongue both need retraining before you can even be understood.
• Grammar distance. Word order that flips the sentence, cases, particles, or verb systems with no English parallel force you to rebuild sentences from scratch rather than translate them.
• Honorifics and register. Some languages bake social hierarchy into the grammar, so saying the same thing to a boss, a friend, and a child requires three different forms you cannot skip.
• Vocabulary overlap. English shares thousands of words with French and German. It shares almost nothing with Mandarin or Arabic, so there are no free words to coast on.

When a language piles on four or five of these at once, you get the super-hard tier. When it shares your alphabet, half your vocabulary, and familiar grammar, you get an easy one. Everything in between is a question of how many load points stack up. If you want the deeper mechanics of why any of this is difficult, we pulled that apart in why it's so hard to learn a language.

The FSI category system, explained

The most credible ranking of the hardest languages to learn does not come from a listicle. It comes from the US Foreign Service Institute, the school that trains American diplomats. For decades the FSI has taught languages to motivated adults in intensive full-time programs and tracked roughly how long it takes them to reach a solid professional working level. Because the students, the method, and the goal are held roughly constant, the differences in time are a fair proxy for relative difficulty for English speakers.

The FSI sorts languages into broad categories by how many hours its students typically need. The exact labels and numbers get quoted in slightly different ways across sources, so treat the following as the widely cited approximate shape rather than a precise contract:

The headline is the gap between the top and the bottom. A super-hard language takes an FSI student on the order of three to four times the hours that Spanish or French does. That is the evidence behind the claim that Mandarin, Cantonese, Japanese, Korean, and Arabic are the hardest languages to learn for English speakers. It is not an opinion poll. It is a rough measurement from a school that has been running the experiment for a very long time.

Two honest caveats before we lean on these numbers. First, they describe full-time students in an intensive classroom with expert teachers and daily immersion, which is not most self-learners. Your calendar timeline will almost certainly be longer, even if your total hours match. Second, the FSI itself notes that within the super-hard group, some languages are usually harder than others for English speakers, with Japanese frequently flagged as the toughest of the set. We break the hour question down further in how many hours it takes to learn a language and in our dedicated look at FSI language difficulty.

The hardest languages to learn, ranked

Here is the super-hard tier, the five languages the FSI system places at the top of the difficulty pile for English speakers. They all land in roughly the same hour range, so treat this less as a strict one-to-five ladder and more as a group of five giants, with notes on which climbers are steepest at which points. We ordered them to move from the tone-and-character heavy East Asian languages, through the grammar-and-honorific heavy ones, to Arabic, which is hard in a category all its own.

For each, we will name the specific load points that make it hard, rather than just saying "it's difficult." Difficulty you can name is difficulty you can plan around.

Mandarin Chinese

Mandarin is the language most people picture when they think of the hardest languages to learn, and the reputation is earned, though not for the reason beginners expect. The two big walls are tones and characters, and they hit at different stages.

Tones come first. Mandarin has four main tones plus a neutral one, and the tone is not decoration, it is part of the word. The classic teaching example is that the syllable "ma" can mean mother, hemp, horse, or a scolding depending on the pitch contour you ride. For an English speaker whose ear has never had to treat pitch as meaning, this is a genuine retraining of perception. Early on you will say a word you think is correct and get a blank stare, because to a native ear you said a different word entirely. The good news is that tones are learnable with focused listening and speaking practice, and they stop feeling alien after a few months of real reps.

Characters are the long grind. Mandarin has no alphabet. To read a newspaper comfortably you need to recognize on the order of a few thousand characters, each a unit you have to learn to read, and often separately to write by hand. There is a pronunciation aid called pinyin that spells sounds in the Latin alphabet, and it is a lifeline for beginners, but real literacy means characters. This is why Mandarin's hours pile up over years rather than months. Speaking can come faster than you fear, but reading and writing are a marathon.

Here is the twist that surprises people. Mandarin grammar is comparatively friendly. There are no verb conjugations to memorize, no grammatical gender, no plural endings, no cases. You do not change the word "eat" for I, you, he, or yesterday. In that one respect Mandarin is simpler than Spanish. The difficulty is concentrated in the sound system and the writing, not the sentence structure, which is a useful thing to know when you plan your study.

Cantonese

Cantonese belongs in the super-hard tier alongside Mandarin, and in some respects it is the steeper of the two for a beginner, mostly because of tones. Where Mandarin has four main tones, Cantonese is usually described as having six, and the distinctions between some of them are subtle for an untrained ear. That extra tonal load makes the listening and speaking wall taller at the start.

Cantonese also has less standardized learning support than Mandarin. Mandarin is the official spoken standard across mainland China and has an enormous industry of textbooks, apps, and courses behind it. Cantonese, spoken in places like Hong Kong and Guangdong and across a large diaspora, has fewer polished beginner resources and a written situation that is more informal and less standardized. That thinner ecosystem is a practical difficulty layered on top of the linguistic one, because part of learning any language is how much good material you can get your hands on.

On the writing side, Cantonese shares the Chinese character system, so the same multi-year literacy climb applies. Formal writing often follows standard written Chinese, which maps more closely to Mandarin, while colloquial Cantonese has its own set of characters and usages for words that only exist in speech. For an English speaker, the takeaway is simple. Cantonese gives you the character grind of Mandarin, a heavier tone load, and fewer guardrails. It is a serious commitment even by super-hard standards.

Japanese

Japanese is the language the FSI often singles out as usually the hardest of an already hard group for English speakers, and once you see what it stacks, the flag makes sense. Interestingly, the difficulty is not in the sounds. Japanese pronunciation is relatively approachable for English speakers, with a small, clean set of sounds and no tones in the Mandarin sense. Beginners are often pleasantly surprised at how sayable their first sentences are. Then the real climb begins.

The writing system is the headline. Japanese runs three scripts at once. There are two syllable-based scripts, hiragana and katakana, each with a few dozen characters, learnable in a matter of weeks. Then there is kanji, thousands of Chinese-origin characters, where a single character can have multiple readings depending on context. Full literacy means knowing on the order of a couple thousand kanji, each with several possible pronunciations. Learning to read Japanese is a genuine multi-year project sitting on top of learning to speak it. Our deeper dive into exactly this lives in is Japanese hard to learn.

Grammar is the second wall. Japanese word order is different from English, typically putting the verb at the end, and meaning is carried by little particles that mark the role of each word rather than by position alone. You do not translate an English sentence into Japanese, you rebuild it in a different shape. It is learnable and highly regular, but it requires rewiring how you assemble a thought.

Then there is keigo, the honorific system. Japanese encodes social relationship directly into the language, with distinct polite, humble, and respectful forms. Saying "to do" or "to go" changes depending on who you are talking to and who you are talking about. This is not optional flourish, it is part of speaking appropriately, and it means learning several ways to say things you already learned once. Sounds approachable, writing brutal, grammar and honorifics deep. That combination is why Japanese so often tops the list.

Korean

Korean is fascinating because it front-loads a gift and back-loads the difficulty. The gift is the writing system. Korean uses Hangul, a genuinely elegant alphabet designed to be learnable quickly. Unlike Chinese characters or Japanese kanji, Hangul is a real alphabet with a small set of letters that combine into syllable blocks, and a motivated learner can read it, slowly, within days. This is the single biggest reason Korean can feel less intimidating than Japanese or Mandarin at the very start.

Do not let that fool you. Once you can sound out words, the grammar reveals itself as the true climb, and it is closely related in shape to Japanese. Verb at the end, particles marking each word's job, and a system of verb endings that changes based on formality and politeness. Korean has its own layered honorific system, so, like Japanese, you learn to bend your sentences depending on who you are speaking to and about. The forms are not decorative. Use the casual form with someone who expects the formal one and you have made a real social error.

Pronunciation sits in the middle. Korean has some consonant distinctions that are hard for English ears, including sets of sounds that feel nearly identical at first but change the word. There is also sound-change behavior where letters shift depending on their neighbors, so the word is not always pronounced exactly as spelled. None of this is impossible, but it takes dedicated listening and speaking to master. For English speakers drawn to Korean through music, film, and shows, the honest picture is a fast, encouraging start with Hangul followed by a long, rewarding grind through grammar and honorifics. If Korean is your target, we have a focused guide to tools in the best app to learn Korean.

Arabic

Arabic is hard in a way that is different from the East Asian languages, and it hides an extra difficulty that catches many learners off guard. Start with the parts people expect. The script runs right to left, connects its letters cursively so a letter changes shape depending on its position in a word, and in everyday writing often omits short vowels, meaning skilled readers supply vowels from knowledge of the word. The alphabet itself is not huge and is learnable in a few weeks, but reading fluently, especially unvoweled text, takes real time.

The sound system adds a second load. Arabic has consonants produced deep in the throat that simply do not exist in English, and getting them wrong can change meaning or mark you instantly as a beginner. On top of that, Arabic vocabulary is built on a system of three-consonant roots, where a core root carries a basic meaning and predictable patterns bend it into related words. Once you internalize the root system it becomes a powerful engine, but for a beginner it is an unfamiliar way of building words with almost no overlap with English to lean on.

The hidden difficulty is the one that surprises people most. There is a large gap between Modern Standard Arabic, the formal written and broadcast register used across the Arab world, and the spoken dialects people actually use day to day, which vary significantly from one region to another. Egyptian, Levantine, Gulf, and North African varieties differ enough that learners often have to make a strategic choice. Study the standard form to read and understand formal media, study a regional dialect to chat with people in a specific place, and ideally build a bridge between them. That diglossia, the split between the written standard and the spoken reality, is a big part of why Arabic earns its super-hard rank.

Why your native language changes the ranking

Everything above is the ranking for a native English speaker, and it is worth repeating because it is the caveat most lists bury. Difficulty is a relationship, not a fixed trait, so the whole ladder rearranges the moment you change who is climbing it. If you already speak a language other than English, or you grew up bilingual, your personal hardest list may look nothing like the FSI one.

Take Korean and Japanese. To an English speaker they sit at the top of the difficulty pile. To each other's speakers they are dramatically easier, because the grammar is closely related, the honorific logic rhymes, and a large chunk of vocabulary traces back to shared Chinese roots. A Japanese speaker learning Korean is not facing an alien grammar the way an English speaker is. They are learning a cousin.

Arabic tells the same story from a different angle. For an English speaker it is super-hard. For a Persian or an Urdu speaker who already reads a related script and shares a slice of vocabulary, it is meaningfully more approachable, even though the languages are not the same family. The shared script alone removes one of the biggest early walls. Meanwhile, Mandarin's tones, terrifying to an English ear, are less shocking to a speaker of another tonal language like Vietnamese or Thai, because the very idea that pitch carries meaning is already installed.

The practical lesson is to audit your own head before you pick. List every language you know, even a little, and ask what any target language shares with them: script, sounds, grammar shape, vocabulary. The more overlap, the softer the climb. This is also why the popular question of which language is objectively easiest has no clean answer. It depends entirely on where you start, a point we make in our guide to the best language to learn. There is no universal hardest language. There is only hardest relative to you.

What the hour estimates really mean

Let's be precise about those FSI hours, because they are the most quoted and most misread numbers in this whole conversation. When you see "about 2,200 hours for a super-hard language," it is easy to turn that into a personal countdown and either despair or get complacent. Both reactions misuse the figure.

First, remember the conditions those numbers came from. They describe motivated adult students in an intensive, full-time government program, taught by expert instructors, immersed daily, aiming at a specific professional level of proficiency. That is a very particular setup. If you are learning on the side, thirty minutes a day around a job, your calendar will stretch far longer than the FSI weeks suggest, even if your eventual total hours land in the same ballpark. The hour figure is not a schedule, it is a rough measure of total effort under ideal conditions.

Second, the estimates measure time to a defined proficiency level, not time to say your first useful sentence. You can have a real, halting conversation in a super-hard language long before you approach the FSI target. The big number describes the distance to professional fluency, not the distance to your first win. Do not let the size of the marathon convince you that the first mile is out of reach. We lay out the full timeline picture in how long it takes to learn a language.

Third, and most important, your method moves this number more than the language does. Two people can both pick Japanese. One spends a year tapping a recognition app and reading grammar explanations, and can barely speak. The other spends the same year talking out loud daily with correction, and holds real conversations. Same language, same hours, wildly different outcomes. The FSI figure assumes a strong method with heavy speaking. Match that and the estimate is meaningful. Fall back on passive study and no amount of the "right" language will save you.

Should you pick a hard language at all?

The honest answer is that it depends on your goal and your appetite, and it is worth being clear-eyed about the tradeoff before you commit years to a super-hard language. There is no prize for choosing the hardest one. There is also nothing wrong with choosing it, as long as you go in with open eyes.

Pick an easier language if your main goal is momentum and early wins. If you want to be having real conversations in months rather than years, a Category I language like Spanish or French will get you there far sooner, precisely because it shares your alphabet, a chunk of your vocabulary, and familiar grammar. Nothing builds a lasting habit like feeling yourself improve, and easier languages hand you that feedback faster. For many people, especially first-time language learners, this is the smarter opening move. Get one language to a comfortable level, learn how you learn, and the second one is always easier.

Pick a hard language if you have a strong specific pull toward it: family heritage, a partner, a career, a culture you love, a country you plan to live in, or just a genuine fascination that will carry you through the slow stretches. Motivation is the fuel that matters most on a multi-year climb, and a real reason to want the language beats an easy grammar every time. Someone deeply drawn to Japanese will out-learn someone half-heartedly grinding "easy" Spanish, because they show up. If that pull is real, the difficulty is a reason to plan carefully, not a reason to fold.

What you should not do is pick a hard language for bragging rights and then be shocked when it demands what the FSI numbers said it would. The hours are the hours. Go in wanting it, budget the time, protect a daily habit, and a super-hard language is entirely within reach. Go in wanting the status without the commitment, and it will quietly defeat you.

How to actually learn a hard one

Say you have chosen your giant. Mandarin, Japanese, Arabic, whatever it is. The good news is that a harder language does not need a fundamentally different method than an easy one. It needs the same method, run more consistently, for longer, with a couple of adjustments for the specific walls. Here is the honest playbook.

• Separate the skills and stagger them. In a super-hard language, listening, speaking, reading, and writing progress at very different speeds. Do not wait for reading to catch up before you speak. Start speaking early with a romanized aid if the script is slow, and let literacy climb on its own timeline in the background.
• Attack the signature wall head-on and daily. For Mandarin and Cantonese, that means tone drills from day one, out loud, every day, because tones do not improve by reading about them. For Japanese and Korean, it means steady grammar and honorific practice in real sentences. For Arabic, it means committing early to a spoken dialect alongside the standard form so you can actually talk to people.
• Speak out loud from the start, badly, on purpose. This is the pillar people skip in every language, and the temptation to skip it is even stronger in a hard one, because you feel less ready. You will never feel ready. Retrieval under mild pressure is what builds a speaker, and a hard language needs more reps of it, not fewer.
• Get corrected constantly. Reps of the wrong tone, the wrong ending, or the wrong honorific just fossilize the mistake. In a super-hard language the number of ways to be subtly wrong is larger, so timely correction matters more, not less. A patient partner who fixes you every sentence is worth its weight.
• Make the daily minimum tiny and unbreakable. A multi-year climb is won or lost on consistency, not intensity. Ten focused minutes of speaking every single day will beat a heroic three-hour Sunday followed by a week of nothing. The chain is everything.

That last point is where most ambitious hard-language plans die. People choose Japanese, buy the textbooks, do a blazing first month, and then let the difficulty become an excuse to stop. The learners who make it are not the most talented. They are the ones who built a small daily speaking habit and defended it across the long middle where progress feels slow. If you want a coach that lets you speak and get corrected every day without judgment, see our plans and pricing.

So here is the move. Pick your language for a real reason, not for the rank. Respect what the FSI numbers are telling you about the size of the commitment, then ignore the intimidation and focus on today's ten minutes of talking. The hardest languages to learn are not learned by people with special brains. They are learned by ordinary people who kept showing up and kept speaking, one imperfect sentence at a time, until the giant stopped looking so tall.