LanguageBridge
LanguageBridge helps K-12 English learners understand grade-level schoolwork. A student selects text on any webpage and gets it in their home language, with read-aloud audio and a simple-English aid for academic terms. A two-way voice feature, Talk to Teacher, lets a student and teacher talk across two languages.
It is a Chrome extension (extension/) and a web app at languagebridge.app, both backed by Azure Functions (backend/). Students never create accounts and no student identity is stored.
Start here
docs/MASTER-DOCUMENT.md is the single current reference: what is built, the function and API reference, data, privacy rules, setup, testing, deployment, decisions, history and roadmap.
| If you need | Go to |
|---|
| How it works, and how to run and test it | docs/MASTER-DOCUMENT.md |
| What changed recently | docs/dev-notes/ |
| Facts we may state to customers, pricing, the DPA | company/, starting with 00-CANONICAL-FACTS.md |
| Compliance plans | docs/compliance/ |
| Specs for what is not built yet | docs/PRD-ADMIN-DATABASE.md, docs/PRD-ML-FLYWHEEL.md, company/PROVISIONING-AND-LICENSING.md |
| Every API request and response shape | backend/shared/types.ts |
Quick start
npm install # repo root
npm run test:backend # backend tests, no credentials needed
npx vitest run # root unit and integration tests
To run the backend locally or load the extension in Chrome, follow sections 11 and 12 of the master document. Read the warning there first: local development uses the production database.
Repo layout
| Path | What it is |
|---|
backend/ | Azure Functions (TypeScript). The production system |
extension/ | Chrome extension, Manifest V3 |
deliverables/ | Chrome Web Store copy and the Talk to Teacher web hand-off package |
ml-pipeline/ | Voice training and inference research. Not deployed |
data/ | Glossary seed data and the standards pipeline |
scripts/ | Deploy and data-loading scripts |
tests/ | Root Vitest suites |
docs/, company/ | Documentation |
Rules that do not bend
- Never store student PII. Students are pseudonymous codes only.
- Only student-written text enters the flag pipeline, never Azure output.
- Service keys stay server-side, never in a public web page.
- Missing configuration fails loudly. No silent defaults.
The reasoning is in section 7 of the master document.
Team
- Justin Bernard — CEO, backend. [email protected]
- Prentice Howard — front end, extension
Proprietary. Copyright 2026 LanguageBridge LLC. All rights reserved.
