Free public-domain US government language courses with textbooks and audio.
CoursesBooks Free BeginnerIntermediateAdvanced A1–C1
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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.
Free A1–C1 Czech lessons, videos and tests, including exam preparation.
WebsitesCourses Free BeginnerIntermediateAdvanced A1–C1
grammarlisteningreadingvocabulary
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Jana Slav's site organises videos, grammar exercises, presentations, podcast episodes and tests by CEFR level all the way to C1, which puts it ahead of almost every other free Czech resource on range. There is a strong strand on the A2 permanent-residence and B1 citizenship exams. The site content is free with a small optional shop; the YouTube channel and podcast have both slowed markedly, with the podcast last updated in 2023, so the site is the living part of the project.
Free audio courses that teach you to reason your way into the language.
CoursesPodcasts Free Beginner A1–B1
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Mihalis Eleftheriou records real lessons with a real student and walks you through constructing the language yourself using cognates and logic — Spanish, French, Italian, German, Greek, Turkish, Arabic and Swahili are covered. Completely free, no ads, no sign-up, funded by donations. The Spanish course in particular is one of the most recommended free resources anywhere; the trade-off is small vocabulary and no reading or writing practice.
A completely free 114-lesson Czech course, including medical, legal and business Czech.
Courses Free BeginnerIntermediate A1–B1
vocabularygrammarreadinglistening
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An EU-supported portal offering a full free course with no time limit and no ads, split into five strands — everyday, medical, business and legal Czech plus a conversational tandem section — with the interface available in Czech, English, German and Polish. The professional strands are unusual and genuinely useful if you work in a Czech hospital or office. The platform is functional rather than polished, and free courseware of this kind tends to stop being updated once the funding round ends, so check the material still matches current usage.
Structured CEFR courses with written corrections from native speakers.
AppsCourses Freemium BeginnerIntermediate A1–B2
vocabularygrammarwritingspeaking
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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.
Podcast courses that teach through a real learner's lesson, season by season.
PodcastsCourses Freemium BeginnerIntermediate A1–B2
listeningspeakinggrammarvocabulary
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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.
The largest structured Czech audio-lesson library, with transcripts and flashcards.
CoursesPodcastsApps Freemium BeginnerIntermediate A1–B1
listeningvocabularygrammarreading
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Innovative Language's Czech arm: dialogue-based audio and video lessons arranged into level pathways, each with a PDF transcript, line-by-line breakdown and SRS flashcards. Czech has very few structured audio courses, which is what makes this worth considering despite the format. A free lifetime account unlocks a fraction of the library, the rest is subscription-only, and the upgrade prompts are constant. The catalogue thins out badly above B1. The public podcast feed was still updating in August 2026.
Slowly-spoken Czech podcast plus tutoring, aimed at people living in Czechia.
PodcastsCoursesTutoringYouTube Freemium BeginnerIntermediate A1–B1
listeningspeakingvocabulary
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Eliška's team built slowczech around one problem — foreigners who understand Czech on paper but freeze in a shop — so the podcast (close to 300 episodes and still weekly in August 2026) speaks slowly about ordinary life, and the tutoring and immersion programmes push output from the first lesson. There is a free starter kit and the whole podcast archive costs nothing. Self-paced courses, group immersion and one-to-one lessons are paid, and the content stops around B1.
Century-old bilingual course books that take you from zero to solid B2.
BooksCourses Paid BeginnerIntermediate A1–B2
readinglisteninggrammarvocabulary
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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.
Structured dialogue-based courses in 13 languages, built by actual linguists.
AppsCourses Paid BeginnerIntermediate A1–B1
vocabularygrammarspeakinglistening
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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.
Routledge's beginner course books with free downloadable native-speaker audio.
BooksCourses Paid BeginnerIntermediate A1–B1
readinggrammarvocabularylistening
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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.
Mass-sentence audio drilling for listening and speaking automaticity.
AppsCourses Paid BeginnerIntermediate A1–B2
listeningspeakingpronunciation
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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.
Conversation-driven courses in 70+ languages, often free through your library.
AppsCourses Paid BeginnerIntermediate A1–B1
speakinglisteningvocabularypronunciation
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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.
Audio courses where you learn by listening in on a real lesson.
Courses Paid Beginner A1–A2
speakinggrammarlistening
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You sit in on a recorded lesson with two students and build sentences aloud alongside them, with no writing, homework or memorisation; 19 languages are available. It is remarkably good at making the core grammar of Romance languages click in a few hours. Vocabulary coverage is small, the recordings are old, and the courses after Michel Thomas's death are taught by other teachers with mixed results — treat it as a fast on-ramp, not a course of study.
Audio-only spaced-recall courses that drill speaking from lesson one.
CoursesApps Paid BeginnerIntermediate A1–B1
speakinglisteningpronunciation
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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.
Self-study course books with audio for 30+ languages, beginner to advanced.
BooksCourses Paid BeginnerIntermediate A1–B2
readinggrammarvocabularylistening
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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.