AI Speaking Partner for 19 Languages

Practice real, unscripted conversations in Spanish, French, Japanese, Mandarin, Arabic, and 14 more languages. Lucy OS1 responds in under 600ms, remembers what you practiced last session, and adapts to your fluency level automatically.

This is not a lesson. There is no XP bar, no lives, no streak pressure. You speak, Lucy OS1 listens and responds like a person, and you get better by having real conversations rather than drilling vocabulary in isolation.

Choose your language

13 real-world scenarios to practice

Each scenario is a different kind of conversation you will have in real life. Practice whichever ones match where you are going or what you are doing.

• Ordering Food — Restaurants, cafes, street food markets, and delivery calls
• Job Interviews — Professional interviews, internship discussions, and career conversations
• Daily Conversations — Small talk, weekend plans, weather, and everyday topics
• Shopping — Retail stores, markets, online orders, and price negotiations
• Travel and Transport — Airports, train stations, hotels, and navigating a new city
• Business Meetings — Professional calls, client presentations, and team discussions
• Making Friends — Social situations, meeting people, and building connections
• Health and Doctor Visits — Doctor appointments, pharmacies, and describing symptoms
• Phone Calls — Answering calls, leaving messages, and handling unexpected conversations
• Asking for Directions — Navigation, landmarks, public transport, and getting around a city
• News and Current Events — Discussing world events, opinions, and staying informed in another language
• Dating and Romance — First dates, expressing feelings, and romantic conversations
• Emergency Situations — Seeking help, describing urgent problems, and handling crises

How Lucy OS1 compares to alternatives

Lucy OS1 is not a replacement for Duolingo if you are building vocabulary from scratch. Lucy OS1 is the missing piece after Duolingo: the real speaking practice that apps cannot simulate.

Welcome