These Are The Hardest Languages For English Speakers To Learn

For English speakers, learning Spanish or Italian can take less than a year. Reaching the same level of proficiency in Japanese, Korean, Mandarin, or Arabic may require nearly four times as much study.

This wide gap reflects how closely a language resembles English in its vocabulary, grammar, sounds, and writing system.

This visualization, created by Julie R. Peasley via Visual Capitalist, ranks languages by difficulty using categories and study-time estimates from Effective Language Learning and Rosetta Stone, which reference Foreign Service Institute-style benchmarks.

Which Languages Are Easiest to Learn for English Speakers?

Languages are generally easier to learn when they share familiar grammar, vocabulary, sounds, or writing systems. That’s why many Category I languages, including Spanish, French, Italian, Dutch, and Swedish, are considered relatively approachable.

The data table below shows the difficulty rankings and estimated learning time for 70 different languages:

One of the most striking findings is the size of the gap between the easiest and hardest languages. While Spanish or French can often be learned in 24–30 weeks, mastering Japanese, Korean, Mandarin, or Arabic may require roughly 88 weeks of study.

Many Category I languages use the Latin alphabet and share vocabulary roots with English through Germanic or Romance-language connections.

This may also help explain why European languages often rank highly in language-learning apps and why Duolingo’s most popular languages globally include several widely taught European options.

What Makes a Language Harder to Learn?

Category III languages tend to have greater linguistic distance from English. This can include unfamiliar grammar structures, new alphabets, or pronunciation patterns that require more time to master.

For example, languages like Russian, Greek, Hindi, Turkish, and Vietnamese all fall into this category. Some use different scripts, while others introduce grammatical systems that are less intuitive for native English speakers.

The “Super-Hard” Languages

Category IV languages are considered exceptionally difficult for English speakers. This group includes Arabic, Cantonese, Mandarin, Japanese, and Korean.

Many of these languages present multiple learning hurdles simultaneously. Mandarin and Cantonese require mastery of tones, Japanese combines several writing systems, Korean introduces a unique alphabet and grammar structure, and Arabic uses an entirely different script. Together, these differences significantly increase the time needed to reach professional proficiency.

To learn more about language use across the U.S., check out Mapped: America’s Most-Spoken Languages After English and Spanish on the Voronoi app.