Duolingo Korean Review (2026)

Duolingo is the world's most popular language app with 113M monthly users. Its Korean course is one of the most-downloaded Korean learning resources. But is it actually good for learning Korean?

After using Duolingo's Korean course extensively and analyzing learner feedback from Reddit, app reviews, and language forums, here's an honest assessment.

What Duolingo Does Well

It gets you started. For someone who has never touched Korean, Duolingo removes friction. Download the app, tap "Korean," and you're learning within 60 seconds. No account setup, no placement test, no overwhelm. This matters more than most language learning resources acknowledge.

Habit formation is unmatched. Streaks, XP leagues, daily reminders, and the guilt-inducing owl push you to open the app every day. Consistency beats intensity for language learning, and Duolingo is engineered to make you consistent. 9 million users have maintained a streak longer than one year.

The gamification is fun. Earn gems, compete in leagues, unlock outfits for Duo. It sounds silly, but it keeps millions of people coming back. For beginners who need motivation more than method, this works.

The price is right. The free tier gives you access to the full course with ads and a hearts/energy system. Super Duolingo ($7/month) removes ads and hearts. For casual learners, this is a fair deal.

Where Duolingo Falls Short for Korean

1. Grammar Is Never Explicitly Taught

This is the biggest problem. Korean grammar is fundamentally different from English — particles, verb conjugation, honorific levels, sentence structure (SOV). Duolingo teaches Korean the same way it teaches Spanish or French: through pattern recognition and translation.

For Romance languages, this works because the grammar is similar enough to English that you can intuit the rules. For Korean, it doesn't. Learners end up memorizing full sentences without understanding why 은 vs 는 changes the meaning, or why you conjugate verbs differently in formal vs informal speech.

Common complaints from r/Korean:

• "I finished the Duolingo tree and still can't form my own sentences"
• "I don't understand when to use 이/가 vs 은/는"
• "The honorific system makes no sense because it was never explained"

Learn Korean particles with explanations →

2. The A1-A2 Ceiling

Duolingo's Korean course covers roughly CEFR A1 to low A2. That's basic greetings, simple sentences, common vocabulary, and survival Korean. There's no path to intermediate or advanced content.

For context, TOPIK Level 2 (basic proficiency) requires A2-B1 competence. Duolingo won't get you there. If your goal is anything beyond ordering food and asking for directions, you'll need to supplement or switch.

3. Hangul Teaching Is Confusing

Duolingo introduces Hangul as syllable blocks without adequately explaining that each block is composed of individual letters. Many learners come away thinking Korean has thousands of characters (like Chinese) rather than 24 letters that combine.

Hangul was designed by King Sejong to be learned in a single sitting. Duolingo's approach takes what should be a 2-hour lesson and stretches it across weeks of confusing syllable-block memorization.

Learn Hangul properly in 6 lessons →

4. No TOPIK or Exam Preparation

If you're learning Korean for university admission, employment in Korea, or immigration (KIIP), you need TOPIK scores. Duolingo has zero TOPIK-specific content — no test format practice, no vocabulary lists aligned to TOPIK levels, no timed exercises.

5. The Hearts/Energy System

On the free tier, you get 5 hearts. Each mistake costs a heart. When you're out, you wait or watch ads. This actively punishes experimentation — the opposite of what you want in language learning. Making mistakes is how you learn, and Duolingo's free tier discourages it.

Super Duolingo ($7/month) removes this. Duolingo Max ($14/month) adds AI features. But that's $168/year for a course that caps at A2.

6. Heavy Romanization Dependency

Duolingo leans on romanization throughout the course. This is a crutch that Korean language educators universally advise against. Korean sounds don't map 1:1 to English letters — ㄷ is closer to "t" than "d", but romanization writes "d". Learning through romanization leads to persistent mispronunciation.

Why romanization hurts your Korean →

Who Should Use Duolingo for Korean?

Duolingo works if:

• You want to try Korean casually with zero commitment
• You need basic travel phrases for a trip to Korea
• You're using it alongside a proper textbook or structured course
• You specifically want a habit-building tool (not a teaching tool)

Who Should Look Elsewhere?

You've outgrown Duolingo if:

• You've finished the tree but can't form original sentences
• You want to understand Korean grammar, not just recognize patterns
• Your goal is TOPIK preparation or academic Korean
• You're frustrated by the A2 ceiling and want intermediate+ content
• You want to learn speech levels and honorifics properly

What to Do After Duolingo

The "Duolingo graduate" — someone who completed the Korean tree and wants to keep progressing — has several options:

Textbooks (Seoul National University series): The gold standard for structured learning. Excellent grammar explanations but no interactivity, no audio practice, and you need discipline to self-study.

Private tutoring (iTalki): Great for conversation but expensive ($15-40/hour) and unstructured unless you find a teacher who follows a curriculum.

Chamelingo: Built specifically for learners who want structured progression from beginner to intermediate with explicit grammar teaching, 30+ exercise types, AI conversation practice, and TOPIK preparation. Free tier available, Pro at $9.99/month.

See a detailed feature comparison →

The Verdict

Duolingo is a good starting point and a poor finishing line. It excels at getting complete beginners to engage with Korean daily. It fails at teaching the grammar, cultural context, and depth needed to actually communicate in Korean.

If you're in your first month of Korean, Duolingo is fine. If you've been on it for 3+ months and feel stuck, that's not a you problem — it's a ceiling built into the product. The good news: the Hangul and basic vocabulary you learned on Duolingo transfers directly to whatever you use next.

---

Prices and features accurate as of February 2026. Duolingo updates its course periodically.