PolyglotGym
A free gym for 100+ languages with real CEFR courses
What it does
PolyglotGym is a free language gym: structured CEFR courses (A1-C2) with interactive exercises, grammar guides, spaced-repetition vocabulary, dialect comparisons, and native-quality audio for 100+ languages - including ones no big app teaches: Icelandic, Georgian, Belarusian, Mongolian, Tagalog, Luxembourgish. Explanations adapt to your native language instead of being translated, and courses are free without signup. Web, iOS, and Android.
Free interactive language courses in 100+ languages. Learn German, Spanish, French, Japanese and more with interactive exercises, a vocabulary trainer, and grammar lessons.
PolyglotGym is a free language gym: structured CEFR courses with interactive exercises, a vocabulary trainer with spaced repetition, grammar guides with practice, and dialogue audio recorded for every lesson. Pick from 100 + languages, from German, Spanish, French, Japanese to dozens more, and start a full beginner course with no paywall in front of the lessons. Learn in your own language, with explanations adapted to your native grammar instead of one-size-fits-all translations. Study several languages at once and PolyglotGym shares vocabulary between them, so a word you know in one is a head start in the next and the gaps between them are easy to see. How studying several languages worksfrom polyglotgym.com
Does the same job
all alternatives →


- CLClozemaster – Learn language in context2017 · clozemaster.com · ▲145

- CTCedille, the largest French language model, released in open source2021 · ▲240
We are excited to announce Cedille, the largest language model for French (6b parameters). Demo: https://cedille.ai Language models are general purpose AI systems that are able to solve a range of tasks by simply being prompted for it. It can be used for example to summarize text, do translations, or for idea generation & overcoming writer's block. You may know GPT-3, the humongous model from OpenAI. Cedille is a similar model targeting the French demographic - but smaller, as we don’t yet have $1b in the bank like they do. Although GPT-3 supports multiple languages including…
More life & fun this month
the category →- TL
Life & fun · 10d ago · louisabraham.github.io

Photosynthesis fires two of your iPhone
Life & fun · 28d ago · photosynthesis.camera
SoloUno▲310Take control of hair pulling, nail biting & skin picking
Life & fun · 28d ago · solouno.io

Scroll through all 43,252,003,274,489,856,000 reachable Rubik's Cube permutations.
Life & fun · 26d ago · everycube.alen.is


Hi HN, I built Eigendrum, a web tool that solves the 2D wave equation for arbitrary shapes so you can hear what they sound like as drums. How it works: * Solves -∇²u = λu using finite element analysis (Kφ = λMφ) on a triangle mesh. * Validated to <0.1% error against closed-form solutions for circles (Bessel zeros) and rectangles. * Sound model factors in strike location, Rayleigh damping, and mallet width. * Includes Kac drums I & II to demonstrate identical sound spectra from different geometries. * No frameworks, build steps, or dependencies. Repo and tests:…
Life & fun · 26d ago · baselashraf81.github.io
Launched alongside, August 2026
the whole month →- TL
Life & fun · 10d ago · louisabraham.github.io


- SA
Hello HN! I found that picking out plausible but diverse skin tones for my digital art and game development projects was kind of difficult, and I got curious about if there was a way to define a color space that made it easy. I've built a color picker and procedural generation algorithm based on the space as well as a bunch of other fun js features and demos throughout the page that use the equations. If you find it interesting, I have lots of explanations of how I built it and what properties the space has. The methodology might be a bit shaky, but hopefully the result is as helpful for…
Life & fun · Aug 2026 · toneyalexander.github.io


I trained a 125M-parameter transformer to autocomplete piano performances in real time (~108 notes/sec on an iPhone 15). The idea is basically GitHub Copilot or Tabnine, except instead of prompting it with code, you prompt it by playing a few notes on a MIDI piano. The model then continues what you played, entirely on-device. The app is free if anyone wants to try it. Happy to answer questions about the model, training, Core ML, or the many things that didn't work.
AI · 17d ago · simedw.com