What is this in the other language?
Between the language you know and the one you're learning.
Get fluent. Say it right. A linguist who hears your mistakes, remembers them, and works with you toward fluency. Or just check a sentence before you send it.
RadLinguist teaches English, French, Spanish and Japanese, and helps you speak and write in them every day — no prompts, no clutter, just clarity. On the web today, with iPhone and Android apps coming.
Stop wasting time typing prompts
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Check if a sentence is correct without crafting a prompt.
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Get translations instantly without switching apps.
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Find better alternatives to sound natural.
One-tap tools for daily language use
Is this sentence correct?
Your sentence, judged — with the fix and why. In text or voice.
How else can I say this?
Other ways to say it, from casual to formal.
Does this sound natural?
Review your text and make it sound natural.
Learn with your teacher
Lessons, one activity at a time
Your AI teacher follows a course with you at your level, by voice or text.
Conversations at your level
A back-and-forth session in the language you're learning, with corrections as you go.
The teacher is an AI, and the app always says so. It teaches English, French, Spanish and Japanese; the app itself works in 12 languages.
Built for real life
Immigrants & Expats
Speak and write confidently at work and in daily life.
Students
Write essays, present, and practice fluency.
Professionals
Quick checks before sending that important email.
Parents
Keep your family's second language alive — practice it yourself and bring it home.
Frequently asked questions
What is RadLinguist?
RadLinguist is a language-learning app with an AI teacher. The teacher teaches English, French, Spanish and Japanese through lessons and practice, and four one-tap tools help you day to day: translate, check a sentence, find alternatives, and polish your text. No prompts needed.
How is RadLinguist different from a general AI chatbot?
General chatbots require you to craft a prompt before every question. RadLinguist replaces that with one-tap tools for what second-language users need day to day: what is this in the other language, is this correct, how else can I say it, and how can I make it sound natural? And it has a teacher that follows a course with you.
Can I use my voice instead of typing?
Yes. The tools, practice and lessons work with either text or voice, so you can use RadLinguist while speaking as well as while writing.
Who is RadLinguist for?
RadLinguist is built for immigrants and expats speaking and writing at work, students writing essays and practising fluency, professionals checking an important email before sending it, and parents keeping a family language alive at home.
Is there a web version of RadLinguist?
Yes. The RadLinguist web app is available at radlinguist.app and runs in your browser.
Is RadLinguist on iPhone and Android?
RadLinguist runs on the web at radlinguist.app today; the iPhone and Android apps are coming to the App Store and Google Play.
Which languages does RadLinguist teach?
The teacher teaches English, French, Spanish and Japanese. The app itself works in 12 languages.
How much does RadLinguist cost?
There are three monthly plans: Tools at US$9.99, Classroom at US$19.99 and Classroom Plus at US$29.99. Each includes the tools, lessons and practice; they differ in how many minutes of live voice they include each month. The first 7 days of the first plan you buy are free. Prices are shown in your local currency before you pay; the Terms of Service have the details.
Get RadLinguist
On the web today. The iPhone and Android apps are coming to the App Store and Google Play; one account will work on all of them.