🇰🇷 Best Korean courses for intermediate learners

Foreign Service Institute, Peace Corps and DLI materials — full textbooks plus hundreds of hours of audio — are public domain and hosted here for free across dozens of languages. The depth is extraordinary and the FSI Basic courses take diplomats to professional working proficiency, which no consumer app attempts. The recordings are from the 1960s–80s, the drills are relentless, and some vocabulary is dated (Cold War era), so they suit disciplined self-studiers, not casual learners.

Unit 0 teaches Hangul and the units after it run all the way to advanced grammar, with thousands of example sentences, audio recordings and vocabulary lists — all free, with no account required. The explanations are unusually thorough and are the go-to reference when TTMIK's short lessons leave you unsatisfied. The site design is dated, the lessons are walls of text with no gamification, and the sheer length means you need real discipline to work through it.

KBS's international service publishes free lesson series with audio, transcripts and vocabulary, including courses hung off Korean drama scenes, plus versions localised into many languages. Free with no account. The site navigation is dated and some series are archived rather than maintained, but the audio quality and the professional scripting are better than most free material.

Run by the King Sejong Institute Foundation, this is a full state-funded curriculum with structured online courses, downloadable Sejong Korean textbooks, and practice tools, free after registration. Because it is the official course used by King Sejong Institutes worldwide, it lines up with TOPIK and with classroom study abroad. The platform is clunky, sign-up can be fiddly, and the production values are institutional rather than slick — but the content quality and the price are unbeatable.

Covers 14 languages along an explicit CEFR path, and its best feature is the community exchange: you submit short writing or speaking exercises and real native speakers correct them, free of charge, in exchange for you correcting theirs. The free tier is limited to core lessons; Premium unlocks grammar, offline and the full path. A solid Babbel alternative if you specifically want writing practice with human feedback.

Mark Pentleton teaches a genuine student while you listen in, across French, Spanish, German, Italian, Chinese, Swedish, Portuguese, Japanese and Gaelic. The podcast seasons are free on any podcast app and are structured as a real curriculum rather than scattered episodes; the Academy sells premium lesson notes, video and bonus audio. Ideal commuting material for beginners through B1, and the Spanish and French series are the strongest.

Each lesson centres on a short native dialogue followed by a line-by-line breakdown, with PDF transcripts, vocabulary lists and cultural notes on paid plans. The volume means there is always something at your level, and the absolute-beginner series is good. The usual Innovative Language caveats apply: relentless discount emails, several confusing subscription tiers, uneven quality across older series, and a free tier that shrinks sharply after the trial.

TTMIK's ten-level curriculum is the most widely recommended structured path in Korean self-study, taught conversationally by native speakers with free audio lessons and paid PDFs, workbooks and printed books. The lessons are friendly and short, which makes them easy to keep up with, and the grammar sequencing is genuinely well thought out. The site has moved most content behind course subscriptions over the years, so less is free than long-time learners remember, and the early levels are light on practice — pair them with a workbook or a tutor.

The long-running independent hub for TOPIK preparation, with free articles on exam structure and scoring, organised past papers, frequency vocabulary lists and level-by-level study advice; full mock tests and prep courses are paid. If you are taking TOPIK for a visa, university place or job, start here rather than on the official site. It is exam-focused by design, so it teaches you to pass a test rather than to hold a conversation.

Each course is ~100 short bilingual dialogues with native audio: you passively absorb for months, then start an 'active wave' translating back into the target language. Books run around €30 (e-courses ~€50) across 70+ languages, and the method is a long-standing favourite among polyglots for reaching real reading fluency. Caveats: many courses are only published from French, the humour is dated, and it demands daily discipline with no gamification to carry you.

Subscription-only after a handful of free intro lessons, typically $10–15/month with big discounts on annual plans. Lessons are short, dialogue-first and explain grammar properly, which makes it a much more serious beginner course than Duolingo. It covers only 13 languages and effectively stops around B1, so it is a stepping stone rather than a destination.

Over 70 languages, each a step-by-step beginner course written by an experienced teacher, and crucially all the audio is free to download from the companion site even if you find the book secondhand. Slightly more academic and grammar-forward than Teach Yourself, which some learners prefer. Like any book series the individual titles differ in quality; the less common languages are often the only decent course in existence.

You listen to and repeat thousands of native-recorded sentences on a spaced schedule, which builds fluent output patterns without explicit grammar study. It covers 60+ languages and keeps nine minority languages (Catalan, Welsh, Taiwanese, Kurdish and others) permanently free as a preservation effort. It is expensive at roughly $20–40/month, and the repetition is monotonous — most reviewers call it effective but overpriced, so try the 7-day trial first.

Lessons build outward from real conversations with colour-coded literal translations and cultural notes, and the catalogue includes endangered and indigenous languages nobody else covers. Retail pricing starts around $10/month, but a very large number of public libraries and universities give patrons free access — check yours before paying. Content depth per language is modest, so it suits travellers and early learners more than people pushing toward B2.

Thirty-minute audio lessons force you to produce sentences out loud before you see anything written, which builds unusually good accent and recall. Subscriptions run about $15–21/month (all-access covers 50+ languages), and older courses are often available through public libraries. It is slow and vocabulary-light by design, so pair it with reading — but for commute or walking time it is the best use of otherwise dead hours.

The 'Complete' books are proper structured courses with dialogues, graded exercises and downloadable audio, and the range covers languages no app touches. Quality varies noticeably by title and author, so check reviews for your specific language before buying rather than trusting the series name. Their graded readers and 'Script Hacking' alphabet guides are also worth knowing about for non-Latin scripts.

The curriculum from Yonsei University's Korean Language Institute, covering levels 1 through 6 with textbooks, workbooks and audio, and mapping cleanly onto TOPIK levels. If you are heading toward university study or a language programme in Korea, this or the Sogang and Seoul National equivalents are what you will be handed. It is dense, classroom-oriented and assumes an instructor — self-studying it without a tutor is hard going.