- Add full message catalogs and content for French (fr) and German (de) - Implement ASCII canonical slugs for French and German routes - Add language-specific search endpoints (/api/busca/fr, /api/busca/de) - Configure strict 404 responses for /fr/livro and /de/livro - Localize SEO, OpenGraph (fr_FR, de_DE), Twitter and JSON-LD schemas - Add localized code example comments across 14 examples for fr and de - Enable 'fr' and 'de' in ENABLED_LOCALES with root negotiation and redirect - Extend test suite in check-i18n, smoke-imagem and verifica-vazamentos Co-Authored-By: Antigravity <noreply@google.com>