Top 5 Languages with the Hardest Grammar for English Speakers

4. Korean 

Number of Mentions: 6

Hours Required to Learn: 2,200

Average ranking: 5.7

Korean ranks 4th on our list of 20 languages with the hardest grammar for English speakers. It has an average ranking of 5.7 across our sources and is considered one of the toughest to learn. English speakers require around 2,200 class hours to learn Korean.