Internationalization (i18n) for signing pages

[fusion94]

Summary

Internationalize the contributor-facing signing page so projects with non-English contributors can present the CLA flow in the contributor's language.

Motivation

Major open source projects have global contributor bases. A signing page in the contributor's language reduces confusion and legal ambiguity about what they're agreeing to.

Implementation notes

• Use Next.js built-in i18n routing or next-intl
• Priority pages: signing page, confirmation, error messages
• Admin/dashboard pages can remain English initially
• Language detection: browser Accept-Language header with manual override
• Translation files in JSON (easy for community contributions)
• Start with: English, Spanish, French, German, Japanese, Chinese (Simplified)
• CLA text itself remains as written by the owner (not auto-translated)

Phase

Phase 8: Polish & Expansion (v3.0 roadmap)