Lingua
Trip-focused Spanish learning across web, mobile, API, audio, and shared contracts.
Lingua is a Spanish-learning app designed around a real trip outcome rather than generic daily practice. Users track destination, departure date, current level, weekly progress, and competency gaps.
The repository sets up a web-first alpha with shared contracts, mock and Prisma-backed API paths, mobile read parity, and provider boundaries for LLM and audio features.
The product architecture supports gradual hardening: start with typed mocks, preserve the same contracts for production persistence, and keep AI/audio providers swappable.
- Trip countdown and level targets mapped to concrete travel situations.
- Shared contracts across Next.js web, Expo mobile, and NestJS API layers.
- LLM and audio provider boundaries so coaching and speech work can evolve independently.
- PostHog and Sentry hooks planned into the product baseline.
Trip-Ready Learning
Lessons tied to travel scenarios and competency gaps.
- Destination and departure timeline
- Level progression tracking
- Scenario-based missions
- Competency coverage by topic
Web and Mobile Parity
Shared product contracts reduce drift across clients.
- Next.js App Router web flows
- Expo SDK 52 mobile baseline
- Typed API contracts
- Mobile read parity scaffolding
Provider Boundaries
AI and audio can be changed without rewriting core UX.
- LLM abstraction
- Audio provider abstraction
- Mock and production data paths
- Smoke test scaffolding