## Context During e2e testing, MR descriptions were generated in French while the project convention should be English for all external-facing content. ## Changes needed Add a **Language conventions** section to `CONTRIBUTING.md`: - Code, comments, commit messages, branch names → English - MR titles and descriptions → English - System prompts / bot messages → configurable via `FAURE_LANG` - `.faure/AGENTS.md` should enforce English for generated MR descriptions This ensures faure itself follows the convention when the agent generates MR descriptions.