Your English, boosted.
In a language you already think in.
Every lesson is in English, but when something doesn't click, your AI specialist explains it in Czech, Slovak, Polish, Ukrainian, German or Spanish. Learn through music, through the classics, and by speaking out loud, all of it scored on a CEFR path from A1 to C2.
Learn
Bilingual block lessons
English content with native-language scaffolding at every step: grammar cards, vocabulary, dialogues, listening and discussion, 17 block types in all.
Learn English through music
Bring a song you actually like. The official video plays beside the lyrics, and everything in those lines becomes vocabulary, idioms, grammar and practice.
Learn English through the classics
Kafka, Wilde, Cervantes, or simply the page you are stuck on. A passage becomes a full lesson with audio, author context and exercises from the text.
Speak. Write. Get scored.
Read a passage, then answer out loud. You get a transcript plus scoring on pronunciation, fluency, grammar, vocabulary and content.
Practice that answers back
Nothing static, ever
Multiple choice you actually click, fill in the blanks, matching and drag-and-drop, with instant checking and explanations rather than a printed answer key.
Flip cards and picture reveals
Vocabulary is extracted from each lesson into flip cards with definitions, IPA pronunciation and a translation in your language.
Written answers, real feedback
Your written responses are saved to your account, so your teacher can read them and reply with targeted feedback.
Your tutor, your language
Paní Liška, Frau Fuchs, Profesora Fox…
Pick the specialist who speaks your language. Switch any time and the whole platform's explanations, hints and translations follow your choice.
English-only when you're ready
Professor Fox is always there for English-only practice, free-form questions and immersion once you want to stop translating.
Help on every screen
Both tutors travel with you through lessons, practice, songs and speech, so you never have to leave what you're doing to ask a question.
Your mistakes explained in Czech, by a tutor that read your last 30 days.
This is the part no global app does properly for this market. Paní Liška does not just mark an answer wrong. She explains in Czech why the English works the way it does, contrasts it with how Czech would say the same thing, and points at the habit behind the mistake. The same holds in Slovak, Polish, Ukrainian, German and Spanish. What you produce is still graded as English; only the explanation switches.
Why, not just what
Corrections carry the reason and a natural example, so the same mistake stops repeating.
CZ↔EN contrast built in
Where Czech and English genuinely differ, the explanation says so instead of leaving you to guess.
It follows you everywhere
Lessons, practice, songs and speaking feedback all switch to your language with one tap.
You said: “I am living here since 2019.”
Paní Liška: „Anglicky řekneme I have been living here since 2019. Čeština tu používá přítomný čas, angličtina předpřítomný průběhový — děj začal v minulosti a trvá dodnes. Zkuste to znovu s vaší prací.“
Illustration of the explanation style. Your own feedback is written from your answer.
Your songs, your lessons.
The song you already know by heart is the easiest English you will ever learn, because you want to understand it.
- 1Pick a song you love, or choose from the library.
- 2Watch the official video while the lyrics sit beside it, clean and readable.
- 3Vocabulary from the actual lines: meaning, pronunciation, translation.
- 4Idioms and grammar drawn from the song, with an activity for each.
- 5Speak or write it back in your own sentence, and your tutor grades it.
Read Kafka. Understand Kafka.
Literature is where most learners give up. This is the support that gets you through the page.
- 1Choose a classic, or paste the passage you are reading.
- 2A plain-English introduction tells you what happens and what to watch for.
- 3Listen to the passage read aloud while you follow the text.
- 4Meet the author with a short biography, so the writing has a person behind it.
- 5Vocabulary, grammar, idioms and translation taken from that exact text.
- 6Exercises generated from those lines, quoting the sentence each word came from.
One tutor, scoring everything you produce.
Wherever you say or write something in English, whether a speaking exercise, a discussion inside a lesson or a writing task in practice, the same tutor reads it and scores it for what that task actually demands.
- 1Speak or type your answer; the transcript is yours to correct before scoring.
- 2Speaking: pronunciation, fluency, vocabulary, grammar and content, plus an overall band.
- 3Inside a lesson: your discussion answer scored out of 100, with corrections and a natural-English rewrite.
- 4In practice: your writing scored on organisation, vocabulary, grammar and content.
- 5Coaching written in your own language, every time, then try again.
Your progress at a glance.
Streaks, accuracy by skill, a 12-week activity map and your strongest vs. weakest area, all from real graded work, with quick access to lessons, music and practice.
Not one AI. Several, chosen by the job.
Most language apps put a single model behind everything they do. We route each call by what it actually has to do: fast, low-cost models handle tagging, translation and clean-up, a stronger everyday model handles anything a learner or teacher reads, and a frontier model is reserved for the few places quality is really judged, such as spoken feedback, lesson building and your personal coaching tips. Speech-to-text, text-to-speech and search run on their own specialist models.
Tagging, translation, extraction and clean-up: the high-volume work nobody reads directly.
Lessons, practice grading, tutor chat and song analysis: everything a learner sees day to day.
Spoken feedback, lesson building from your own material, and the coaching tips drawn from your last 30 days.
- 1. Your answer
Spoken or written work, from a lesson, practice or a tutor chat.
- 2. Your context
Your CEFR level, goals and recent weak skills, read from your own record.
- 3. Teaching knowledge
Curated first-language contrasts, such as Czech vs English, added to the request.
- 4. Private gateway
One secure route to the model chosen for the task. Providers act as our processors.
- 5. Feedback in your language
Scores, the reason behind each correction, and a next step to try.
It is why the feedback reads like a teacher rather than a chatbot: the places that need judgement get a model chosen for judgement, and the places that do not are kept cheap so the first group can stay expensive.
Before a model change reaches learners, we run a fixed set of real speech answers and songs through the current model and the candidate, side by side, and store every run. A change ships because the comparison says it is better, not because a newer name appeared.
Through our secure AI gateway we can access models from Google (Gemini), OpenAI (GPT) and Anthropic (Claude), and we pick per task. Today's features run on Gemini and GPT. We do not publish which model serves which feature, because we re-route calls whenever a better option appears.
Explore LinguaBOOST AI AnalysisProgress you can see
CEFR test and certificates
Start with a placement test, then earn a certificate as you complete each level. Promotion is automatic from your real results.
Every graded action, logged
A timeline of lessons, quizzes, speech attempts and practice, plus achievements, streaks and a top-learners board.
Coaching from your own data
AI reads your error patterns and tells you what to work on next, in your language.
See how close the next one is.
Points, completion and your streak update from real graded work, and the badges you nearly have are shown with exactly how far you still are.
Make it yours
The student becomes the teacher
Fork any lesson and rewrite it for your level, your interests and your job vocabulary, using credits included in your plan.
Bring your own material
Upload a text or worksheet and turn it into a full interactive lesson with exercises and vocabulary.
Append, replace or undo
Every AI edit shows a cost preview first and can be undone, so you never lose work you liked.
How you start
- 1
Create your account
Sign up in under a minute and pick the language your AI specialist should explain in.
- 2
Find your level
Take the CEFR placement test on your first login, and your lessons and practice are matched to it.
- 3
Learn every day
Work through lessons, songs and speaking practice. Your progress, certificates and streaks build automatically.
Ready to boost your English?
Start free, find your CEFR level, and learn with a tutor who explains in the language you think in.