Not an app that drips you streaks for years. A 30-day protocol built on how memory actually works — frequency, spacing, sound, and speaking out loud from day one.
Roughly 600 words carry 80% of everyday speech. You learn those first — not chapter one of a textbook.
An SM-2 engine shows each word exactly as you're about to forget it. The forgetting curve, weaponised.
Train the ear on minimal pairs and shadow native speech. You can't say what you can't hear.
Output builds fluency, not input alone. You talk — clumsily, out loud — starting today.
Fluency isn't a vocabulary. It's a reflex — the moment the second language stops being translated and simply arrives. This system aims your thirty days straight at that reflex, and gets out of the way.
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Habits don't run on willpower — they run on triggers. This is the anchor you set.
Each day stacks one brain-hack on the last. You don't sprint — you compound. Tap any unlocked day to make it today's focus.
Heard a word you want to keep? Add it — the engine will schedule it for you.
The move that actually builds fluency: produce a sentence from scratch — out loud — and get it fixed until it's clean. Friction is where learning happens.
Do this daily, in small doses. Every rep you fight for is a word that becomes automatic.
Every tool here is a documented learning-science principle, made usable. Open one and put it to work.
reviewed at least once · 0 now in long-term intervals
0% of everyday speech, by frequency weighting
Starting a different language, or beginning again? You can wipe your progress and choose a new tongue.
A few details so Mother Tongue can shape itself to exactly how your mind works. The more precise you are, the better the fit — this is how we set you up to win.
Your number saves your progress and is how you’re let back in.
Your details are used privately to personalise your thirty days — never shared.
Pick the language your next thirty days belong to.
Be honest — this sets your whole plan. A returning student shouldn’t relearn “hello”; a beginner shouldn’t drown in the subjunctive. Roughly your high-school level.
This isn’t decoration — it rewires the whole experience: session size, novelty, sound, sensory load, and pattern-interrupts. Choose what fits you.
You can change this anytime.
You won't learn "everything." You'll build fluency islands — the handful of things you'll actually talk about. Choose yours.
Willpower fades; triggers don't. Anchor your daily practice to something you already do.