Learn English by Speaking with AINot by Studying It.
The fastest way to reach fluency is to speak — not to memorize grammar rules. Practice with Ava, your AI partner, until you're confident, then connect with 300,000+ real learners worldwide.
Two ways to practice with Ava
Talk freely, or rehearse a specific real-life situation — both correct your mistakes as you go.
Open conversation with Ava
No topic picker, no script — just talk. Ava adapts to your English level automatically and keeps the conversation moving, correcting you naturally as you go.
- Adapts to your level automatically
- Corrects mistakes as you speak
- Talk about anything — travel, hobbies, opinions
- Voice-first, with live captions
65 real-life scenarios
Rehearse the conversations you'll actually have — a job interview, a doctor's visit, ordering food — across 6 categories. Pick up right where you left off.
- 65 scenarios across 6 categories
- Text or voice, always in character
- Sessions save and resume
- Beginner to advanced difficulty
Why speaking practice beats studying every time
Most English learners study for years but still freeze when it's time to speak. Science explains why — and how to fix it.
improvement in speaking scores among learners who practiced with AI conversation tools vs those who studied traditionally.
Gualán & Ramírez, 2024
increase in fluency with measurably less hesitation after regular AI speaking sessions.
Thao, Ly, Thu & Kien, 2025
more likely to develop a daily practice habit when using AI conversation vs textbook study alone.
Radhiyya, Nasution & Ginting, 2025
Everything your AI English partner gives you
Private tutors cost $40–80 per hour. Your Catlangu AI partner is free, available 24/7, and never loses patience.
Learn like a child would
Children become fluent by speaking constantly — not by studying grammar. Your AI partner gets you speaking from day one, the same natural way.
Never freeze mid-sentence
Run out of words? Your AI partner gives you suggestions so the conversation always keeps moving. No awkward silences, no giving up.
Grammar feedback as you speak
Make a mistake and keep going — then get natural corrections woven into the response. You learn without the conversation stopping.
Free vs $40–80/hr tutors
A private English tutor costs $40–80 per hour. Catlangu's AI gives you unlimited practice for free. Same result, without the invoice.
AI gets you ready. Real people make it stick.
Most AI English apps stop at the AI. Catlangu doesn't. When you're ready to go beyond the practice room, 300,000+ real learners are waiting.
Start with AI — zero pressure
Build your confidence privately. Make mistakes, try new vocabulary, find your voice. The AI never judges and never gets tired of you.
Move to real 1-on-1 calls
When you're ready, Quick Match connects you with a real learner in seconds. See their level and language before you connect.
Join live group conversations
Group Rooms let you practice with multiple learners at once — by topic, by level, by interest. Real English, real people, real fluency.
English roleplay scenarios you can practice right now
Real situations. Real language. Choose from 65 scenarios across 6 categories — practice the conversations that actually come up in daily life.
Job Interview in English
Practice the questions that make people freeze — "Tell me about yourself", "What are your weaknesses?" — until your answers feel natural and confident.
Travel & Airport
Check into a hotel, ask for directions, order food, or handle unexpected situations. Arrive at your destination ready for anything.
Ordering at a Café
Order a coffee, ask about the menu, handle a mix-up with your order — the small conversations that happen every single day.
Shopping & Returns
Ask for help finding something, make a return, handle a refund — the vocabulary that turns a frustrating errand into a normal conversation.
A Doctor's Visit
Describe symptoms, understand a diagnosis, ask the questions you're nervous about — practice the conversation before you actually need it.
Daily Small Talk
Chat about the weather, your weekend, your hobbies. The low-stakes conversations that build real confidence and real friendships.
How AI English practice works
Three steps. No tutor needed. No schedule.
Open the app
Download Catlangu free on iOS or Android, or open the web app. No credit card. No waiting. Start speaking in under a minute.
Choose your topic or roleplay
Pick a scenario — job interview, travel, small talk — or just say hello and let the conversation go naturally. The AI follows your lead.
Speak, improve, repeat
Talk. Make mistakes. Get natural corrections. Come back tomorrow and do it again. That's how fluency actually builds — not from a textbook.
Questions about AI English practice
Is practicing English with AI actually effective?
Yes — and research backs it up. Studies show learners who practice speaking with AI improve fluency significantly faster than those who study with traditional methods. The key is volume: the more you speak, the faster you improve, and AI makes it easy to speak every single day.
What's the difference between Free Talk and Roleplay?
Free Talk is an open conversation — Ava picks up on whatever you want to discuss and adapts to your level automatically, no topic needed. Roleplay drops you into one of 65 structured real-life scenarios, like a job interview or a doctor's visit, with a clear character and goal, and your progress saves so you can resume later. Both correct your mistakes as you go — pick whichever fits how you want to practice today.
What topics can I practice with the AI?
Any topic. Job interviews, travel, business English, daily small talk, making friends, debating ideas — you set the scene. The AI adapts to your level and keeps the conversation going naturally, without making it feel like a lesson.
How is Catlangu different from using ChatGPT for English practice?
Catlangu is built specifically for English learners — not general Q&A. It combines AI conversation practice with structured vocabulary lessons, live voice calls with real people, group rooms, and a community of 300,000+ learners. ChatGPT gives you a chatbot. Catlangu gives you a full learning ecosystem.
How is Catlangu different from Gliglish or other AI English apps?
Most AI English apps stop at the AI. Catlangu takes you further: once you've built confidence with your AI partner, you can jump into live 1-on-1 voice calls with real learners, join group voice rooms, and connect with a community of 300,000+ people on the same journey. AI starts you. Real people finish the job.
Do I need to be advanced to use AI English practice?
No. Beginners and advanced learners both benefit. If you know basic English, start today. The AI adjusts to your level — slower when you need it, more natural as you grow. You can even ask questions in your own language while you build confidence.
Is it free?
Yes. Catlangu is free to download and free to start on iOS, Android, and the web. AI practice sessions are included in the free plan. No credit card. No trial period. Just free.