Langsi teaches you Thai vocabulary in real sentences, not isolated flashcards. Spaced repetition schedules every review for you: hard words come back sooner, words you know less often. Listen first, then read, with audio for every word and sentence. Add your own word lists or learn your teacher's lists, on the web or on Android. No ads, nothing to distract you.
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Here's what the word means:
Your word gets placed into your personal learning system.
Your next repetition is automatically scheduled.
Every answer makes your word selection more precise.
Now let's anchor it with real examples.
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Listen closely to the word and sentences — pronunciation sticks best when you say it out loud right along with it.
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| Word | Transliteration | Meaning |
|---|---|---|
| ฉัน | chan | I |
| รัก | rak | love |
| แมว | aemw | cats |
| มาก | ma ak | very much |
This is how Langsi breaks down every example sentence: word by word, with translation and transliteration.
And this is just the beginning — there's a lot more waiting in the full course.
Your Progress
Langsi always shows you exactly where you stand — and what's next.
Personal daily goal that you can adjust to your needs
Leitner repetition system makes sure nothing gets forgotten
Visible progress per word, category, and day
Downloadable daily summaries — perfect for continuing to learn with AI
Learn words and vocabulary with real example sentences instead of isolated vocabulary lists.
Mastery level per word, as a percentage — shows exactly how confident you already are with a word
Thai vocabulary works differently from most languages you might have studied before — and that's exactly why memorizing word lists rarely works on its own.
Thai is a tonal language: the same syllable can mean completely different things depending on pitch. The word 'mai' can mean new, burn, wood, silk, or a simple question particle, depending entirely on its tone. Langsi marks the tone on every word and example sentence, so you're never guessing — and you can hear it spoken correctly every time.
Thai script also doesn't use spaces between words. A sentence like "ฉันรักแมวมาก" looks like one continuous string of characters to a beginner, even though it's really four separate words. Before you can read fluently, you need to learn how to mentally segment sentences — which is exactly what Langsi's word-by-word breakdown trains, sentence after sentence.
Because Thai script takes time to learn, Langsi shows every word and sentence in Latin transliteration with tone marks alongside the original script. You can start speaking and understanding immediately, then gradually get comfortable with reading Thai characters as you go — no need to master the alphabet first. Thai also uses classifiers — special counting words that change depending on what you're counting — and shifts noticeably between formal and casual registers depending on who you're speaking to. These aren't edge cases; they show up in nearly every real Thai sentence, which is why Langsi always teaches vocabulary inside full example sentences instead of as isolated words.
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No. Every word and sentence is also shown in Latin phonetics with tone marks — you can start right away and get used to Thai script gradually.
Yes. The combination of meaning, audio, example sentences, and phonetics helps you learn new words in a clear context from day one — no prior knowledge needed.
Yes. Every word and example sentence can be played aloud, so you can train pronunciation and tones directly — not just read the script.
You can start for free. Langsi runs directly in your browser, no installation needed — see the pricing section above for the details.
Most learners can handle everyday conversations with around 800–1,000 core words used in context, plus a working sense of tones and sentence structure. Langsi prioritizes exactly this kind of high-frequency, real-use vocabulary instead of random word lists.