Luca is an AI‑driven language tutor that lets users practice speaking by having real‑time conversations in English, German, Spanish, French, Italian, and Portuguese. The app organizes learning into a structured course that progresses from beginner (A1) to advanced (C1) levels, adapting the difficulty to the learner’s skill and speed. Users can call the AI partner at any time to engage in dialogue, receiving immediate feedback without the pressure of traditional multiple‑choice tests. Its emphasis on conversational practice and adaptive AI guidance distinguishes it from conventional lesson‑based apps.