What are The Most Difficult Languages to Learn？

What are the most difficult languages to learn? You've probably seen rankings that list languages by how long it takes to reach working proficiency. One of the most well-known is the Foreign Service Institute, or FSI ranking. In this system, languages are divided into five levels. Category 1. Languages take about 6 months, such as French or Italian. Category 2. Takes around 30 weeks, like German. Category 3. About 36 weeks, including Indonesian and Malay. Category 4. Around 44 weeks, such as Greek, Hindi, Russian, Thai, or Turkish. Category 5 is the hardest group, requiring nearly 2 years, including Mandarin, Cantonese, Arabic, Japanese, and Korean. These rankings are wrong, but they are built on one key assumption. The learner is a native English speaker. Once you change that assumption, the entire picture changes. Like, my native language is Mandarin Chinese, and I've studied more than a dozen foreign languages, including Cantonese and Chinese. I speak around 10 languages from very different language families. Because of that, I don't fully agree with these rankings. Among the languages often labeled most difficult, only Arabic truly felt difficult to me. That's because language difficulty is often misunderstood. It doesn't measure how complex a language is on its own. It measures how unfamiliar that language is to learners. From a linguistic perspective, difficulty usually comes from three areas. Sound systems, grammar structure, and writing systems. Let's break them down. Different languages use different physical habits when we speak. So when you learn a new language, you are not just learning words. You are retraining your muscle memory. Some languages use the front of the tongue more. Others rely heavily on the back of the tongue and the throat. This is why many learners struggle with Arabic, including myself. Not because it's illogical, but because it uses sound positions we've never trained before. Both our muscles and our ears need time to adapt. Sound difficulty often depends on what your native language already does. For example, French nasal vowels feel natural to French or Portuguese speakers, but often feel strange to learners whose languages don't use nasalization. The same thing happens with tongues. For many learners, tongues like those in Chinese feel extremely difficult. Using pitch to change meaning is unfamiliar. But for Chinese speakers, it's the opposite. Because tongue is already part of how meaning works, learning other tonal languages like Thai or Vietnamese often feels much easier at the sound level. Rhythm matters too. Languages like English organize speech through stress, reduction, and linking. If your native language is syllable-timed, like Chinese, Japanese, Spanish, or Korean, English can sound fast or unclear, not because it is, but because your listening habits haven't adjusted yet. You are listening syllable by syllable while the language is organizing meaning around the stress and rhythm. So here is the key point. Pronunciation difficulty is never absolute. It depends on which speech habit you've already trained and how your ears are used to organizing sound. Many learners say they are bad at grammar. But most of the time, that's not the real problem. Grammar feels hard because different languages work in different ways and your brain is used to only one of them. Some languages organize meaning mainly through word order. If you change the order, the meaning changes. Languages like Chinese or Vietnamese work this way. Words don't change much, so meaning comes from position and context. If you grow up with this system, it feels natural. This is also why people often say, oh, Chinese grammar is easy. There's no gender, no case system, and very little to memorize. But that's only true from this side. For learners used to having inflection, Chinese can feel unclear because grammatical relationships aren't written on the words themselves. Now compare that with languages that rely on inflection, like German. In these languages, meaning is built into the word. Endings show tense, number, gender, or case. For native speakers or learners from Dutch or Russian, this feels natural. Word order is flexible because the grammar is clearly marked. But for me, German felt easy at first, but at higher levels, things changed. You have to track multiple markings at the same time. And if even one element is wrong, the sentence falls apart. The rules weren't unclear. My thinking just couldn't switch fast enough. Then there are agglutinative languages like Japanese or Turkish. Here, grammar starts on two words through suffix. You often don't fully understand a sentence until the very end. If you are used to getting meaning early, this takes real adjustment. Languages like English or French sit somewhere in between. They rely on word order but also use inflection. This is why they feel manageable early on but often become difficult at higher levels. None of these systems are better or worse. They just train the brain to expect meaning in different ways. So when people ask whether a language has easy grammar, the real question is easy for whom? Before grammar or vocabulary becomes an issue, the writing system alone can decide whether someone even wants to start. When a script looks completely unfamiliar, it can feel intimidating right away. Think of Chinese, Arabic, or Thai. Different shapes, different directions. Everything feels new. Many learners see that and immediately think this must be extremely hard. But that reaction is mostly psychological. Once you get past the script, many of these languages are far more regular and logical than people expect. The real challenge is getting over the initial mental barrier. Familiar alphabet creates the opposite problem. Languages written in Latin alphabets like Spanish, French, Italian, or Turkish often feel easy at the beginning. You recognize the letters, you can read words, and it feels like faster progress. That early comfort can be misleading. It's easy to stay in reading comfort zone and delay harder skills like listening, speaking, or grammar accuracy. You feel like you are improving but your real ability grows much more slowly. Then there's the most deceptive case, partial familiarity. A writing system can look familiar enough to seem manageable while hiding much deeper complexity. Japanese is a good example. If you know Chinese characters, it's tempting to think you have a big advantage and in some ways you do. But recognizing characters doesn't mean you understand how sentences work and how meaning is structured in real use. So the real problem is rarely the script itself. It's the expectation the writing system creates. Whether it scares you away too early or makes you think you are progressing more than you actually are. Once you are aware of that, it becomes much easier to stay realistic and stay consistent. To be honest, my perception of language difficulty isn't fixed. It changes as my overall language ability grows. Things like pronunciation and writing systems can usually be handled with focused effort early on. They feel hard at first but over time they become manageable. What really separates languages in the long run is structure. How a language organizes meaning and how it works in real use. I've already mentioned that German was difficult for me for this reason. But the most difficult language I've studied is Arabic. For me, Arabic was intense on every level. Pronunciation, grammar, and writing system. It challenged everything I thought I knew about language learning. One of the hardest parts is that modern standard Arabic isn't what people use in daily life. To communicate naturally, you also have to deal with spoken varieties. That experience completely changed how I think about difficulty. Interestingly, after Arabic, learning Persian and Turkish felt like a shift in scale. When I studied Persian, I didn't need to relearn the writing system. The pronunciation was simpler. Many words came from Arabic and the grammar felt more direct. But this is important. If you learn Persian without any background in Arabic, it would feel very different. Turkish is another language that's often underestimated. Because it uses the Latin alphabet, it looks easy at first. I also felt like I was getting a lot of for free in the beginning. There are many low words and simple daily sentences feel manageable. But at intermediate and advanced levels, the real challenge begins. Turkish was my first agglutinative language. And it required a completely different way of processing sentences. So what I've learned is this. Real language difficulty rarely appears at the beginning. It shows up later when a language forces you to change how you think, not just memorize more rules. That's why choosing a language based only on how easy it is to start is risky. Some of the savage cliffs are much further down the road. So based on all of this, I want to offer some practical advice about choosing a language. First, I don't recommend choosing a language only based on difficulty. Language learning is a long-term investment. If you don't generally like a language, even the easy ones are hard to stick with until you can actually use them. At the same time, I also don't recommend choosing a language without considering reality at all, based only on short-term enthusiasm. A better approach is to look at both sides together. On one hand, choose a language you truly enjoy and want to stay connected with long-term. On the other hand, understand how that language differs from the ones you already know. In pronunciation, grammar, and writing system, this helps you form more realistic expectations before you start. For example, if a language is very different in pronunciation or writing, it's normal for progress to be slow at the beginning. If a language is very different in grammar or thinking patterns, struggling more in the middle or later stages doesn't mean you choose the wrong language. You are not trying to avoid difficulty. You are trying to know where the difficulty will show up. Once you have that mental preparation, a lot of frustration simply disappears. So instead of asking which language is the easiest, it's often more helpful to ask three questions. Do I generally like this language? How is it different from the languages I already know? Am I willing to give myself more time for those differences? If you are clear on these three questions, I believe any language you choose can lead to a very rewarding learning journey. Thank you for watching. If you found this helpful, feel free to like the video and share it with anyone who's learning a new language. I will see you in the next one. Bye!