1. Finnish Language
What makes learning Finnish particularly demanding for English speakers is the translation and pronunciation aspects. The grammatical rules of Finnish are truly beyond imagination for a native English speaker.
You must invest a considerable amount of time to delve into and tackle the intricacies of this language. Even if that happens, there's no guarantee that you will truly master it. Our advice to you is not to attempt learning this language, especially if English is your mother tongue.

2. Hungarian Language
Hungarian is a language with some of the most peculiar grammar rules in the world. It boasts 14 vowels and 18 distinct cases (which can go up to 30 in some studies), while English has no distinct cases at all.
Therefore, Hungarian is undoubtedly a significant challenge for an English speaker. Additionally, the sentence structure of this language is entirely different from most languages worldwide. In summary, it will be a tough journey for English speakers aiming to conquer this language.

3. Icelandic Language
No foreign language is easy to learn, and Icelandic is no exception. The multitude of grammar rules makes this language truly challenging for English speakers.
Learning Icelandic requires genuine dedication and effort compared to other languages. However, once you grasp the rules and commit to studying, you can eventually understand what 'Eyjafjallajökull' means.

4. Sanskrit - Pali Language
Although many English words are directly borrowed from this language, words like Avatar, Karma, Crimson, Jungle, ... are frequently used by English speakers.
But the reason Pali language is challenging for English speakers is because it has numerous grammar rules that English lacks.

5. Khoisan Language
Khoisan language is most known for utilizing click consonants, sounds resembling the crack of a whip or the trot of a horse. This is what makes Khoisan one of the most challenging languages to learn and communicate with for those not familiar with the African linguistic family.
The sounds, consonants in Khoisan are often written with characters like ! and ǂ. It might be overwhelming for those attempting to conquer this type of language. But don't be afraid, give it a try, who knows, you might succeed.

6. Arabic Language
With over 420 million native speakers, undoubtedly, Arabic is one of the most widely spoken languages globally. The reason Arabic is challenging for English speakers is that it contains sounds and alphabets that don't even exist in the English language.
So, you'll have to put in a lot of hard work to have a chance at learning this intricate language, my friends.

7. Russian Language
While it might be amusing to mimic Russian in a humorous way, truly understanding and excelling in this language requires a significant amount of time and effort. Russian has an entirely unfamiliar alphabet for an English speaker.
A speaker of Russian must pay close attention to stress to pronounce accurately; sometimes a slight stress mistake can change the meaning of a word. Although stress is also crucial in English pronunciation, it might not carry the same weight as in Russian, don't you think?

8. Korean Language
As a nation situated on the Korean Peninsula, South Korea has a history of language development quite distinct, even though Korean language and script share some influence with Chinese and Japanese.
However, for many English speakers, learning Korean proves to be a real challenge. Simply put, the character system, writing, and pronunciation in Korean are entirely different from the Latin script of English. If you're an English speaker, give learning Korean a try as a personal challenge! It's sure to be quite fascinating.

9. Japanese Language
Surely, it takes a considerable amount of dedicated study and research before you can navigate the basics of Japanese... at a beginner level. Japanese consists of thousands of different characters with distinct pronunciations and meanings, not to mention the challenge of combining them.
Currently, the writing system of Japanese employs four character forms: Kanji (Chinese characters), Hiragana, Katakana, and Romaji. And after mastering those character charts, you embark on the challenging journey of learning to speak... It's truly a puzzle! There's no shortcut to learning this complex language - except for diligence and determination.

10. Chinese Language (Cantonese and Mandarin)
While various languages are used in China, one of the most prevalent is Mandarin (the most spoken language globally), used by nearly 1 billion people.
Chinese encompasses a writing system with thousands of different characters. You must learn them to understand this language. According to statistics, at a minimum, you need to know over 3000 basic characters in Chinese to grasp the simplest vocabulary. To read newspapers, the number of characters needed to learn is over 4000. Scholars in China today can memorize over 10,000 characters, while dictionaries record over 40,000 characters in Chinese. To read, write, and speak Chinese, you undoubtedly need dedication, determination, and a passion for this language. Otherwise, you might give up midway.
