I shipped a production bilingual site using Astro 5 + React 19 islands.

Main goals were fast rendering, low JS payload, and strong technical SEO.
Stack: Astro, Tailwind v4, Framer Motion, Cloudflare Pages, Turnstile, Zod, Resend.

Live demo: https://lyrixdigital.com/
Repo: https://github.com/PlezySZN/Lyrix-Digital