Maybe not the most difficult in the world to learn, but according to various studies, Greek is among the hardest languages for an English-speaking person.
After all, the expression “it’s all Greek to me” isn’t there by accident.
According to the data, most western European languages are classified as easy to learn – with English speakers estimated to achieve proficiency in 24 weeks.
Russian, Hindi, Thai, Polish and Greek, on the other hand, take around 44 weeks to learn, while the hardest languages, which include Japanese, Korean, Chinese and Arabic, can take more than a year and a half to reach the proficiency level.
Greek in particular, is really hard to learn,
..not only for English-speaking people, but all Latin-oriented language speakers. It has different letters, various intonations and a quite difficult grammar to learn