What is the hardest language to learn?

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It's incredible to know that there are thousands of languages spoken across the world, each with its unique set of challenges for learners. A question that often pops up is: "Which language is the hardest to learn?". Today we take a closer look at this question and consider different factors that make learning a language challenging.

What is the hardest language to learn?
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Learning a language is a complex process that involves several components, including phonetics (sounds), morphology (word formation), syntax (sentence structure), semantics (meaning), and pragmatics (communication in context). These factors all contribute to the perceived difficulty of a language.

Language Difficulty

ranks languages based on their difficulty for English speakers. Factors include similarity to English and script complexity.

FSI Language Difficulty Rankings

  • Category I: Easiest languages (e.g., Spanish, French, Italian)
  • Category II: Moderately difficult languages (e.g., German, Indonesian)
  • Category III: Difficult languages (e.g., Russian, Hebrew, Arabic)
  • Category IV: Very difficult languages (e.g., Chinese, Japanese, Korean)

In theory, you should also be able to apply this the other way around to work out how hard It would be for someone to learn English. But it isn't quite as simple as that in practice.

What about English?

Learning English can be challenging due to its irregular spelling, pronunciation and verb conjugation, despite its global dominance. However, learners have access to a wide range of resources, and the language's prevalence in media and technology makes it more accessible and easier to learn.

The English language poses a significant challenge tosecond-language English speakers due to its vast range of vowel and consonant sounds, including diphthongs, which might be unfamiliar to them. One of the well-known difficulties is the inconsistency between spelling and pronunciation. The irregularities in English spelling are infamous, making it challenging for learners to comprehend.

Another hurdle can be the extensive vocabulary, compounded by words with multiple meanings. Even more casual language and idioms can confuse and contradict basic language rules.

What can impact difficulty?

Linguists have identified aspects that can make a language more difficult to learn, such as inflectional complexity, gendered nouns, and intricate verb conjugations. There are also other factors that can impact the ease or difficulty:

Native language

The difficulty of acquiring a new language can be influenced by the learner's native language. If a language shares linguistic features with one's mother tongue, it may be easier to learn due to similarities in grammar or vocabulary. For example, someone who knows German or French may have an easier time picking up English than a Japanese speaker due to the languages having some overlap. At the same time, a Japanese speaker may have an easier time learning Chinese.

Sometimes, these similarities can be owed to the history of a language, where a language may have derived from another/the same source or intertwined at some point. English borrows a significant number of and words.

Cultural influences

Learning a new language requires understanding of both cultural and practical aspects. Adapting to different social conventions, cultural norms, and language usage in varied contexts can be challenging.

For instance, some languages have a broader range of vocabulary for different occasions and levels of formality than others. In places like Korea, your age can even determine how you're addressed, how you should speak and how you/others around you behave.

If you come from a language that shares similar norms and conventions, you will likely have an easier time picking it up.

So, what's the hardest language to learn?

There’s no straight answer for this question. Learning a language is a highly individualized experience. The difficulty of learning a language can vary significantly from person to person based on their background, motivation, and exposure to the language.

Determining the hardest language to learn can be challenging, as language learning is a personal process influenced by multiple factors. Although evidence, such as the FSI rankings and linguistic analysis, provides a foundation for comprehending language difficulty, it isn’t always the solid answer. To simplify it though, the more different the language is from your own, the harder it’ll be. Don’t let this put you off; learning a language can be a gratifying experience. Need some reasons to help you decide if you should pick up English? Give our post 'Why should I learn English?'a read.

Fancy brushing up on your language skills or picking up a new language entirely? Check out the Mondly app.

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References

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    Balancing work, life, and learning: How adult learners navigate English language learning

    By Dr. Le Dinh Bao Quoc
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    Dr. Quoc is an author, educational solutions provider and AIED expert with over 20 years of experience in ELT and education in Vietnam. He is the Founder and CEO of Pro.Ed Education Solutions and Chief Officer of EduVerse, a global network supporting lifelong learning for educators. Dr. Quoc is also the author of The Art and Science of ChatGPT in Education and was named a LinkedIn Top Educational Leadership Voice in 2024. His work focuses on integrating AI into education to support personalized and flexible learning for teachers and learners.

    For many adult learners, mastering English isn’t just about gaining a new skill—it’s about unlocking opportunities in work, family and social spheres. But juggling English lessons alongside work, family obligations and social commitments is a challenge that can feel overwhelming.

    This guide explores the unique challenges adult learners face and how educators can support them with empathy, flexibility and effective strategies.

    The challenges of learning English as an adult

    Meet Le, a 35-year-old Vietnamese project manager who dreams of working for an international company. With a demanding full-time job and two young children, finding time for English lessons feels impossible. Missing classes and struggling to complete assignments leads to frustration and self-doubt—an all-too-common experience among adult learners.

    Many adults face similar challenges:

    • Balancing work, family and personal commitments leaves little time and energy for study.
    • Fatigue after a long day makes it difficult to concentrate or retain information.
    • Progress feels slow, which can be demotivating.

    Without practical support, the goal of English proficiency can seem out of reach.

    Strategies for overcoming challenges

    1. Setting SMART Goals

    Educators can guide learners to set Specific, Measurable, Achievable, Relevant, and Time-bound (SMART) goals. Breaking down larger objectives into small, measurable milestones gives learners a sense of achievement. For example, app’s Global Scale of English (GSE) provides actionable “Can-do” statements, such as:

    • Reading (GSE 37/CEFR A2+): Can understand simple personal emails.
    • Speaking (GSE 44/CEFR B1): Can give a short talk with visual support.

    These manageable goals create motivation and help learners like Le stay focused without feeling overwhelmed.

    2. Offering flexible learning options

    Flexibility is key for adult learners. Teachers can adopt strategies such as:

    • Modular lessons that can be completed in short sessions.
    • Micro-learning, including 10-minute daily practices using apps or quick grammar exercises.

    For learners like Le, micro-learning can easily be integrated into a work commute or lunch break.

    3. Blending learning with real-world scenarios

    Teaching English through practical, real-life contexts makes lessons more relevant and efficient. Using authentic materials like emails, meeting notes, or presentations mirrors learners’ daily lives and creates immediate applications for their new skills. For instance:

    • Help learners role-play workplace conversations.
    • Develop speaking proficiency for social interactions or workplace scenarios.

    This approach saves time and reinforces the usefulness of learning English, keeping learners motivated.

    4. Encouraging weekly reflection

    Reflection allows learners to monitor their progress, stay motivated and adapt their strategies. Teachers can:

    • Encourage learners to set weekly goals (e.g., learning new business vocabulary or practicing pronunciation for 15 minutes daily).
    • Use reflection journals to track achievements, identify challenges and adjust learning plans.

    This habit reinforces a growth mindset, helping learners make consistent progress amidst their busy schedules.

    Implementing the strategies

    Here’s how educators can apply these strategies effectively:

    1. Assess and set goals

    Work with learners to set realistic, measurable goals based on their personal motivations and schedules.

    2. Create flexible study plans

    Develop personalized study schedules that incorporate modular lessons and micro-learning techniques.

    3. Use authentic materials

    Include sample emails, presentations, or conversations that align with the learner’s work or life situations, making lessons more practical.

    4. Encourage accountability

    Implement tools like reflective journals or digital reminders to help learners stay on track and see their progress.

    5. Leverage personalized AI tools

    Use AI-powered tools to recommend tailored exercises, provide instant feedback and enable targeted practice in learners’ focus areas.

    Why It matters

    English proficiency opens doors to better job opportunities, stronger social connections and enriched personal growth. By providing empathetic and flexible support, teachers empower learners to achieve their goals without compromising their work-life balance.
    For educators seeking further resources, app’s GSE framework offers valuable tools to help adult learners succeed. Teachers can use these aids to track progress and personalize lessons for maximum impact.

    Celebrate education

    To mark the incredible work of educators helping learners balance work, life and study, we encourage you to share your own experiences and tips to others. Together, we can continue to empower lifelong learning and celebrate the role of education in transforming lives.