5. Finnish: Finnish is spoken by about five million people, most of whom reside in Finland. Finnish is one of two official languages of Finland. Finnish is a very logical language but different from other European language, which makes it bit difficult to learn. But due to its organized structure, it easy for those who are methodical.
4. Korean: It is a unique language with no dependencies on other language. Historical and modern linguists classify Korean as a language isolate. Korean is the official language of South Korea and North Korea.
3. Japanese: is an East Asian language spoken by about 126 million people, primarily in Japan. Japanese is difficult to learn because it involves thousands of characters to write which are hard to remember. Well practice is the key to master this language.
2. Arabic: The difficulty level of this language can be imagined that letters can be written in 4 different forms depending on where you belong. The understanding of Arabic would be different for person of Iraq from a person from Egypt. Although is common language for the Arab Word. There are no or low vowels, which makes it more difficult to comprehend.
1. Chinese: This is spoken by one-fifth of the total world population , may be because China being the most populated country in the world. All varieties of Chinese are tonal and analytic. All varieties of spoken Chinese use tones to distinguish words. Specially Cantonese and Mandarin from Chinese Languages or dialects are considered to be most difficult of all.
There other languages which are difficult to learn like Vietnamese, Thai, Hungarian. So Let us know what are your thoughts on this.