* Your native language: Speakers of languages with similar grammar and vocabulary will find learning related languages easier.
* Your learning style and experience: Some people are naturally good at memorizing vocabulary, while others find grammar rules easier.
* Your motivation and dedication: The more time and effort you put in, the easier it will be to learn any language.
However, some languages are often cited as being particularly challenging for native English speakers:
* Mandarin Chinese: The tonal system, complex writing system, and different grammatical structures pose significant challenges.
* Arabic: Right-to-left writing, complex grammar, and unfamiliar sounds can make it difficult.
* Japanese: Three writing systems (hiragana, katakana, and kanji), a complex honorific system, and different sentence structure make learning Japanese demanding.
* Hungarian: It has a unique grammar system with no clear relationship to other European languages.
* Finnish: A complex system of vowel harmony and agglutination (adding suffixes to create words) can be challenging.
* Korean: The writing system, which combines elements of Chinese characters and phonetic symbols, requires significant effort to master.
Ultimately, the "toughest" language is subjective and depends on the individual learner. It's best to choose a language that interests you and motivates you to learn, as that will make the process more enjoyable and ultimately easier.