Shipping an AdSense-Ready, Multilingual Next.js Site: A 2026 Playbook

This is non-negotiable. Before you write a single blog post, build these pages and link them in your footer:

• Privacy Policy & Terms: Don't use lorem ipsum.
• About Us: Write three clear paragraphs about who you are.
• Contact: Make sure the contact form actually works.

If you have a language toggle (EN/JA/AR), these pages must be localized too. A broken link in a translated footer is an immediate trust killer.

You need 5–10 "anchor articles" (800–1500 words) that solve real problems. Don't publish 50 thin pages; publish 5 great ones.

A good starter set for a tech studio:

1. "Localized Next.js App Router without breaking SEO"
2. "Privacy-first analytics with GA4 and CSP"
3. "Production contact forms with Turnstile and Resend"

Each article needs a problem statement, a solution, code snippets, and a clear call to action.

Multilingual sites often fail because they confuse search engines.

Also, persist the ?lang= query or path preference. Bouncing a user back to English when they click a link is a UX failure.

AdSense, GA4, and Turnstile all require specific Content Security Policy (CSP) allowances. A strict policy will block them by default.

Use this baseline in src/proxy.ts (nonce-based CSP):

script-src 'self' 'nonce-{RUNTIME_NONCE}' 'strict-dynamic' https://www.googletagmanager.com https://www.google-analytics.com https://pagead2.googlesyndication.com https://fundingchoicesmessages.google.com https://tpc.googlesyndication.com https://googleads.g.doubleclick.net;
style-src 'self' 'nonce-{RUNTIME_NONCE}';
style-src-attr 'unsafe-inline';
connect-src 'self' https://www.google-analytics.com https://region1.google-analytics.com https://www.googletagmanager.com https://pagead2.googlesyndication.com https://googleads.g.doubleclick.net https://adtrafficquality.google https://ep1.adtrafficquality.google https://ep2.adtrafficquality.google https://fundingchoicesmessages.google.com https://challenges.cloudflare.com;
frame-src 'self' https://challenges.cloudflare.com https://googleads.g.doubleclick.net https://tpc.googlesyndication.com https://fundingchoicesmessages.google.com https://adtrafficquality.google https://ep1.adtrafficquality.google https://ep2.adtrafficquality.google https://www.google.com;

Google uses Core Web Vitals as a proxy for site quality.

• Fonts: Self-host or use next/font.
• Images: Always define width and height to prevent Cumulative Layout Shift (CLS).
• JS Budget: Keep heavy interactivity off the main thread.