Academics
CorpusForge
A corpus-linguistics word game for ages 15–18: you set the tile bag. Sort each language’s letters, graphemes, and words by how often they really appear — the rare ones are worth the most — and discover Zipf’s law, why a tile isn’t a byte (Vietnamese NG is one unit), and why every language needs its own bag. The bag you build is the real data our word games run on. On-device; nothing leaves your device.
▶ Play it nowBuilt for sittings of about 25 minutes on the screen. That is our design budget, not a measurement.
#0E7490 Characters who teach
Meet the cast
CorpusForge's cast are guides for ages 15–18 (no illustrated storybook): Freqa counts how often each unit appears, Zeta shows how a few units do most of the work, Grapha insists a tile is a unit of the writing system (NG is one), and Rara weighs the rare, late-learned units that earn the most.
Freqa
frequency — count how often each unit appears; that sets everything
Zeta
The long tail — a few units do most of the work, the rest are rare (Zipf's law)
Grapha
The grapheme — a tile is a unit of the language's own script (NG, CH, щ), never a byte
Rara
Rarity — the rare and late-learned units carry the most points and the most meaning
What's inside
Learning goal
A corpus-linguistics word game for ages 15–18: you set the tile bag. Sort each language’s letters, graphemes, and words by how often they really appear — the rare ones are worth the most — and discover Zipf’s law, why a tile isn’t a byte (Vietnamese NG is one unit), and why every language needs its own bag. The bag you build is the real data our word games run on. On-device; nothing leaves your device.
Mentored by Freqa — no data leaves the device.
How CorpusForge handles your kid's data
- ✅ All progress, settings, and AI-generated content stays on the device
- ✅ No analytics, no tracking, no third-party SDKs
- ✅ Free — no ads, no in-app purchases
- ✅ No personal information collected from children — in line with COPPA (updated by the 2026 FTC amendments)
- ✅ No chat with strangers — play-together rooms use a short code and preset emotes, never typed messages
For you, the grown-up
Spark & Whetstone, our free site for grown-ups, tells what CorpusForge teaches in a short course of its own.