diff --git a/website/astro.config.mjs b/website/astro.config.mjs
index 106618b..60217f3 100644
--- a/website/astro.config.mjs
+++ b/website/astro.config.mjs
@@ -71,7 +71,8 @@ export default defineConfig({
           !page.includes("/tags/") &&
           !page.includes("/account/") &&
           !page.includes("/oauth/") &&
-          !page.includes("/invite/")
+          !page.includes("/invite/") &&
+          !page.includes("/en-US")
         );
       },
       serialize: (item) => {
@@ -86,6 +87,27 @@ export default defineConfig({
           item.url = item.url.replace(/^https?:\/\/[^/]+/, baseUrl);
         }
 
+        if (item.links?.length) {
+          item.links = item.links.map((link) => ({
+            ...link,
+            url: link.url.replace(/^https?:\/\/[^/]+/, baseUrl),
+          }));
+
+          // Point x-default at the English (root) alternate
+          const defaultLink = item.links.find(
+            (link) => link.lang === LOCALES_MAP[DEFAULT_LOCALE],
+          );
+          if (
+            defaultLink &&
+            !item.links.some((link) => link.lang === "x-default")
+          ) {
+            item.links.push({
+              url: defaultLink.url,
+              lang: "x-default",
+            });
+          }
+        }
+
         // Check if this is a homepage link using the current base URL
         const homepageLinks = SUPPORTED_LOCALES.map((locale) => {
           if (locale === DEFAULT_LOCALE) return `${baseUrl}/`;
diff --git a/website/public/_redirects b/website/public/_redirects
index 1a83d31..b4c530b 100644
--- a/website/public/_redirects
+++ b/website/public/_redirects
@@ -1,4 +1,7 @@
 /quantum-security-checker /quantum-risk-checker 301
 /quantum-security-checker/ /quantum-risk-checker 301
 /quests /quests/shill 301
-/quests/ /quests/shill 301
\ No newline at end of file
+/quests/ /quests/shill 301
+/en-US / 301
+/en-US/ / 301
+/en-US/* /:splat 301
diff --git a/website/public/robots.txt b/website/public/robots.txt
index cd352e8..5559fcc 100644
--- a/website/public/robots.txt
+++ b/website/public/robots.txt
@@ -1,4 +1,6 @@
 User-agent: *
+Content-Signal: search=yes, ai-input=yes, ai-train=yes
+
 Allow: /
 
 Sitemap: https://www.quantus.com/sitemap-index.xml
\ No newline at end of file
diff --git a/website/src/components/features/about/ContactSection.astro b/website/src/components/features/about/ContactSection.astro
index 2aa770e..bd8681b 100644
--- a/website/src/components/features/about/ContactSection.astro
+++ b/website/src/components/features/about/ContactSection.astro
@@ -21,6 +21,8 @@ const t = await createTranslator(locale);
       href="mailto:hello@quantus.com"
       class="contact-email about-animate"
       data-delay="0.45"
+      data-track="contact_email_click"
+      data-track-cta-location="about_contact"
     >
       {t("about.contact.email")}
     </a>
@@ -28,6 +30,8 @@ const t = await createTranslator(locale);
       href="mailto:hello@quantus.com?subject=Enquiry%20from%20Quantus%20Website"
       class="contact-cta about-animate"
       data-delay="0.6"
+      data-track="contact_email_click"
+      data-track-cta-location="about_contact"
     >
       {t("about.contact.cta")}
     </a>
diff --git a/website/src/components/features/community/EventSection.astro b/website/src/components/features/community/EventSection.astro
index 0a10373..2838c86 100644
--- a/website/src/components/features/community/EventSection.astro
+++ b/website/src/components/features/community/EventSection.astro
@@ -26,7 +26,10 @@ const t = await createTranslator(locale);
           href="https://tally.so/r/D4502E"
           target="_blank"
           rel="noopener"
-          class="event-cta">{t("community.events.card.cta")}</a
+          class="event-cta"
+          data-track="qday_notify_click"
+          data-track-cta-location="community_events"
+          >{t("community.events.card.cta")}</a
         >
       </div>
       <div class="event-card-right">
diff --git a/website/src/components/features/community/SocialsSection.astro b/website/src/components/features/community/SocialsSection.astro
index 9f15f29..044a9c9 100644
--- a/website/src/components/features/community/SocialsSection.astro
+++ b/website/src/components/features/community/SocialsSection.astro
@@ -20,6 +20,9 @@ const t = await createTranslator(locale);
         rel="noopener"
         class="social-box comm-animate"
         data-delay="0"
+        data-track="community_click"
+        data-track-channel="x"
+        data-track-cta-location="community_socials"
       >
         <span class="social-platform">
           {t("community.socials.platforms.x")}
@@ -32,6 +35,9 @@ const t = await createTranslator(locale);
         rel="noopener"
         class="social-box comm-animate"
         data-delay="0.08"
+        data-track="community_click"
+        data-track-channel="instagram"
+        data-track-cta-location="community_socials"
       >
         <span class="social-platform">
           {t("community.socials.platforms.instagram")}
@@ -56,6 +62,9 @@ const t = await createTranslator(locale);
         rel="noopener"
         class="social-box comm-animate"
         data-delay="0.24"
+        data-track="community_click"
+        data-track-channel="youtube"
+        data-track-cta-location="community_socials"
       >
         <span class="social-platform">
           {t("community.socials.platforms.youtube")}
diff --git a/website/src/components/features/community/TelegramSection.astro b/website/src/components/features/community/TelegramSection.astro
index 68a86c7..aa8c156 100644
--- a/website/src/components/features/community/TelegramSection.astro
+++ b/website/src/components/features/community/TelegramSection.astro
@@ -22,7 +22,11 @@ const t = await createTranslator(locale);
       target="_blank"
       rel="noopener"
       class="telegram-btn comm-animate"
-      data-delay="0.45">{t("community.telegram.cta")}</a
+      data-delay="0.45"
+      data-track="community_click"
+      data-track-channel="telegram"
+      data-track-cta-location="community_telegram"
+      >{t("community.telegram.cta")}</a
     >
   </div>
 </section>
diff --git a/website/src/components/features/home/CommunitySection.astro b/website/src/components/features/home/CommunitySection.astro
index e7ca9f6..7f2a377 100644
--- a/website/src/components/features/home/CommunitySection.astro
+++ b/website/src/components/features/home/CommunitySection.astro
@@ -43,6 +43,9 @@ const t = await createTranslator(locale);
           href="https://t.me/quantusnetwork"
           target="_blank"
           class="community-panel-cta"
+          data-track="community_click"
+          data-track-channel="telegram"
+          data-track-cta-location="home_community"
         >
           {t("home.community.cards.telegram.cta")}
         </a>
@@ -73,6 +76,9 @@ const t = await createTranslator(locale);
           href="https://x.com/QuantusNetwork"
           target="_blank"
           class="community-panel-cta"
+          data-track="community_click"
+          data-track-channel="x"
+          data-track-cta-location="home_community"
         >
           {t("home.community.cards.x.cta")}
         </a>
@@ -118,6 +124,9 @@ const t = await createTranslator(locale);
           href="https://www.instagram.com/quantusnetwork/"
           target="_blank"
           class="community-panel-cta"
+          data-track="community_click"
+          data-track-channel="instagram"
+          data-track-cta-location="home_community"
         >
           {t("home.community.cards.instagram.cta")}
         </a>
@@ -148,6 +157,9 @@ const t = await createTranslator(locale);
           href="https://www.youtube.com/@QuantusNetwork"
           target="_blank"
           class="community-panel-cta"
+          data-track="community_click"
+          data-track-channel="youtube"
+          data-track-cta-location="home_community"
         >
           {t("home.community.cards.youtube.cta")}
         </a>
diff --git a/website/src/components/features/home/EcosystemSection.astro b/website/src/components/features/home/EcosystemSection.astro
index 6b20774..cef6c87 100644
--- a/website/src/components/features/home/EcosystemSection.astro
+++ b/website/src/components/features/home/EcosystemSection.astro
@@ -128,6 +128,9 @@ const t = await createTranslator(locale);
               target="_blank"
               rel="noopener"
               class="eco-dl-tag"
+              data-track="wallet_store_click"
+              data-track-store="ios"
+              data-track-cta-location="home_ecosystem"
             >
               {t("home.ecosystem.cards.wallet.app_store")}
             </a>
@@ -136,6 +139,9 @@ const t = await createTranslator(locale);
               target="_blank"
               rel="noopener"
               class="eco-dl-tag"
+              data-track="wallet_store_click"
+              data-track-store="android"
+              data-track-cta-location="home_ecosystem"
             >
               {t("home.ecosystem.cards.wallet.google_play")}
             </a>
@@ -340,7 +346,14 @@ const t = await createTranslator(locale);
             {t("home.ecosystem.cards.network.validators")}
           </div>
           <div class="eco-dl-tags">
-            <a href="#" class="eco-dl-tag">
+            <a
+              href="https://explorer.quantus.com/"
+              target="_blank"
+              rel="noopener"
+              class="eco-dl-tag"
+              data-track="explorer_click"
+              data-track-cta-location="home_ecosystem"
+            >
               {t("home.ecosystem.cards.network.explorer_cta")}
             </a>
           </div>
diff --git a/website/src/components/features/home/HeroBanner.astro b/website/src/components/features/home/HeroBanner.astro
index ced483d..e5f68d3 100644
--- a/website/src/components/features/home/HeroBanner.astro
+++ b/website/src/components/features/home/HeroBanner.astro
@@ -25,6 +25,8 @@ const t = await createTranslator(locale);
         class="wallet-cta-link"
         target="_blank"
         rel="noopener"
+        data-track="wallet_store_click"
+        data-track-cta-location="home_hero"
       >
         {t("home.hero_banner.cta_download_wallet")}
       </Button>
diff --git a/website/src/components/features/home/NewsletterSection.astro b/website/src/components/features/home/NewsletterSection.astro
index dc88a06..c04014f 100644
--- a/website/src/components/features/home/NewsletterSection.astro
+++ b/website/src/components/features/home/NewsletterSection.astro
@@ -310,6 +310,7 @@ const t = await createTranslator(locale);
 
 <script>
   import apiClient from "@/api/client";
+  import { trackEvent } from "@/scripts/shared/analytics";
 
   const submitBtn = document.getElementById("nl-submit") as HTMLButtonElement;
   const firstInput = document.getElementById(
@@ -374,12 +375,19 @@ const t = await createTranslator(locale);
       );
       const data = await resp.json();
 
-      if (resp.status !== 201 && data.error) {
-        window.toast.error(data.error);
+      if (resp.status !== 201) {
+        if (data.error) {
+          window.toast.error(data.error);
+        }
         setLoading(false);
         return;
       }
 
+      trackEvent("generate_lead", {
+        lead_type: "newsletter",
+        form_id: "homepage_newsletter",
+      });
+
       formWrap.style.transition = "opacity 0.4s ease";
       formWrap.style.opacity = "0";
       setTimeout(() => {
diff --git a/website/src/components/features/qday-checker/AdviceSection.astro b/website/src/components/features/qday-checker/AdviceSection.astro
index 4d4e1c4..0da2f78 100644
--- a/website/src/components/features/qday-checker/AdviceSection.astro
+++ b/website/src/components/features/qday-checker/AdviceSection.astro
@@ -32,7 +32,10 @@ const t = await createTranslator(locale);
       class="qrc-cta-btn qrc-animate wallet-cta-link"
       data-delay="0.45"
       target="_blank"
-      rel="noopener">{t("quantum_risk_checker.advice.cta")}</a
+      rel="noopener"
+      data-track="wallet_store_click"
+      data-track-cta-location="risk_checker_advice"
+      >{t("quantum_risk_checker.advice.cta")}</a
     >
     <span class="qrc-footer-note qrc-animate" data-delay="0.6">
       {t("quantum_risk_checker.advice.footer_note")}
diff --git a/website/src/components/features/qday-checker/HeroBanner.astro b/website/src/components/features/qday-checker/HeroBanner.astro
index afb136a..a4d6ab3 100644
--- a/website/src/components/features/qday-checker/HeroBanner.astro
+++ b/website/src/components/features/qday-checker/HeroBanner.astro
@@ -583,6 +583,7 @@ const checkerI18n = {
     type RiskLevelKey,
     type RecommendationKey,
   } from "@/scripts/risk-checker/quantum-security-scorer";
+  import { trackEvent } from "@/scripts/shared/analytics";
 
   type CheckerI18nShape = {
     errors: { empty: string; invalid: string; ensFailed: string };
@@ -676,6 +677,11 @@ const checkerI18n = {
       return;
     }
 
+    trackEvent("risk_check_complete", {
+      checker_version: "v1",
+      completion_status: "success",
+    });
+
     const {
       address,
       addressData: { ensName },
diff --git a/website/src/components/features/technology/CtaSection.astro b/website/src/components/features/technology/CtaSection.astro
index 92e1360..6a39255 100644
--- a/website/src/components/features/technology/CtaSection.astro
+++ b/website/src/components/features/technology/CtaSection.astro
@@ -21,6 +21,8 @@ const t = await createTranslator(locale);
       class="tech-cta-secondary"
       target="_blank"
       rel="noopener"
+      data-track="explorer_click"
+      data-track-cta-location="technology_cta"
     >
       {t("technology.cta.secondary_cta")}
     </a>
diff --git a/website/src/components/features/wallet/CtaSection.astro b/website/src/components/features/wallet/CtaSection.astro
index d6d1fd5..ebd55bd 100644
--- a/website/src/components/features/wallet/CtaSection.astro
+++ b/website/src/components/features/wallet/CtaSection.astro
@@ -19,6 +19,9 @@ const t = await createTranslator(locale);
       class="wallet-btn-primary"
       target="_blank"
       rel="noopener"
+      data-track="wallet_store_click"
+      data-track-store="ios"
+      data-track-cta-location="wallet_cta"
     >
       {t("wallet.cta.primary_cta")}
     </a>
@@ -27,6 +30,9 @@ const t = await createTranslator(locale);
       class="wallet-btn-secondary"
       target="_blank"
       rel="noopener"
+      data-track="wallet_store_click"
+      data-track-store="android"
+      data-track-cta-location="wallet_cta"
     >
       {t("wallet.cta.secondary_cta")}
     </a>
diff --git a/website/src/components/features/wallet/HeroBanner.astro b/website/src/components/features/wallet/HeroBanner.astro
index af2f4a4..5a75efd 100644
--- a/website/src/components/features/wallet/HeroBanner.astro
+++ b/website/src/components/features/wallet/HeroBanner.astro
@@ -23,6 +23,9 @@ const t = await createTranslator(locale);
         class="wallet-btn-primary"
         target="_blank"
         rel="noopener"
+        data-track="wallet_store_click"
+        data-track-store="ios"
+        data-track-cta-location="wallet_hero"
       >
         {t("wallet.hero_banner.cta_app_store")}
       </a>
@@ -31,6 +34,9 @@ const t = await createTranslator(locale);
         class="wallet-btn-secondary"
         target="_blank"
         rel="noopener"
+        data-track="wallet_store_click"
+        data-track-store="android"
+        data-track-cta-location="wallet_hero"
       >
         {t("wallet.hero_banner.cta_google_play")}
       </a>
diff --git a/website/src/components/features/whitepaper/DownloadButton.astro b/website/src/components/features/whitepaper/DownloadButton.astro
index be4b3cd..47d8d45 100644
--- a/website/src/components/features/whitepaper/DownloadButton.astro
+++ b/website/src/components/features/whitepaper/DownloadButton.astro
@@ -15,6 +15,8 @@ const { href, label, class: className = "" } = Astro.props;
     "inline-flex items-center gap-2 rounded-lg border border-white/15 bg-white/5 px-4 py-2 text-sm font-medium text-white/80 transition-colors hover:border-white/25 hover:bg-white/10 print:hidden",
     className,
   ]}
+  data-track="whitepaper_pdf_download"
+  data-track-cta-location="whitepaper_header"
 >
   <svg
     class="h-4 w-4"
diff --git a/website/src/components/layout/Layout.astro b/website/src/components/layout/Layout.astro
index 4cc2e52..c761ad4 100644
--- a/website/src/components/layout/Layout.astro
+++ b/website/src/components/layout/Layout.astro
@@ -28,6 +28,7 @@ import {
   getLocaleFromUrl,
   getTextDirection,
   getAlternateUrls,
+  removeLocaleFromUrl,
   createTranslator,
 } from "@/utils/i18n";
 import { generateBreadcrumbs } from "@/utils/build-json-ld";
@@ -46,7 +47,7 @@ const currentLocale = getLocaleFromUrl(Astro.url.pathname);
 const t = await createTranslator(currentLocale);
 const textDirection = getTextDirection(currentLocale);
 
-// Fix canonical for default locale duplicate content
+// Fix canonical for default locale duplicate content (e.g. /en-US/about → /about)
 let canonical = metadata.canonical;
 const currentPath = Astro.url.pathname;
 
@@ -54,15 +55,19 @@ if (
   currentLocale === DEFAULT_LOCALE &&
   currentPath.startsWith(`/${DEFAULT_LOCALE}`)
 ) {
-  const rootPath = currentPath.replace(`/${DEFAULT_LOCALE}`, "") || "/";
-  canonical = `${env.SITE_BASE_URL}${rootPath}`;
+  canonical = `${env.SITE_BASE_URL}${removeLocaleFromUrl(currentPath)}`;
 }
 
 const alternates = getAlternateUrls(currentPath);
-const languageAlternates = Object.entries(alternates).map(([lang, path]) => ({
-  href: `${env.SITE_BASE_URL}${path}`,
-  hrefLang: lang,
-}));
+const defaultHref = `${env.SITE_BASE_URL}${alternates[DEFAULT_LOCALE]}`;
+const languageAlternates = [
+  ...Object.entries(alternates).map(([lang, path]) => ({
+    href: `${env.SITE_BASE_URL}${path}`,
+    hrefLang: lang,
+  })),
+  // Fallback language for unmatched locales (Google hreflang requirement)
+  { href: defaultHref, hrefLang: "x-default" },
+];
 
 const breadcrumbs = generateBreadcrumbs({
   pathname: currentPath,
diff --git a/website/src/components/layout/footer/Footer.astro b/website/src/components/layout/footer/Footer.astro
index f73d7af..a3e8389 100644
--- a/website/src/components/layout/footer/Footer.astro
+++ b/website/src/components/layout/footer/Footer.astro
@@ -7,6 +7,7 @@ import {
   getLocalizedPath,
 } from "@/utils/i18n";
 import LanguageSwitcher from "@/components/ui/LanguageSwitcher.astro";
+import { trackAttrs } from "@/scripts/shared/analytics";
 
 const locale = getLocaleFromUrl(Astro.url.pathname);
 const t = await createTranslator(locale);
@@ -79,6 +80,7 @@ const isCurrentPage = (href: string) =>
                   "text-content-55 hover:text-content-90 mb-3.5 block text-[13px] no-underline transition-colors duration-200",
                   isCurrentPage(link.href) && "text-content-90",
                 )}
+                {...trackAttrs(link.track, link.trackParams)}
               >
                 {t(link.label)}
               </a>
diff --git a/website/src/components/layout/navbar/Navbar.astro b/website/src/components/layout/navbar/Navbar.astro
index f7fc85a..3c78a66 100644
--- a/website/src/components/layout/navbar/Navbar.astro
+++ b/website/src/components/layout/navbar/Navbar.astro
@@ -8,6 +8,7 @@ import {
 import { SITE_NAVIGATIONS } from "@/constants/site-navigations";
 import Button from "../../ui/Button.astro";
 import { applyStyles } from "@/utils/apply-styles";
+import { trackAttrs } from "@/scripts/shared/analytics";
 
 const locale = getLocaleFromUrl(Astro.url.pathname);
 const t = await createTranslator(locale);
@@ -34,6 +35,7 @@ const t = await createTranslator(locale);
             class={applyStyles(
               "after:bg-flare font-navbar-link text-muted relative no-underline transition-all duration-200 ease-in-out after:absolute after:bottom-[-2px] after:left-0 after:h-px after:w-0 after:transition-all after:duration-250 after:content-[''] hover:text-white hover:opacity-100 hover:after:w-full [&.nav-active]:text-white [&.nav-active]:after:bottom-[-4px] [&.nav-active]:after:h-[2px] [&.nav-active]:after:w-full",
             )}
+            {...trackAttrs(item.track, item.trackParams)}
           >
             {t(item.label)}
           </a>
@@ -49,7 +51,10 @@ const t = await createTranslator(locale);
       target="_blank"
       rel="noopener"
       variant="outline"
-      size="small">{t("navbar.download_wallet")}</Button
+      size="small"
+      data-track="wallet_store_click"
+      data-track-cta-location="nav"
+      >{t("navbar.download_wallet")}</Button
     >
 
     <button
@@ -131,6 +136,9 @@ const t = await createTranslator(locale);
         <a
           href={getLocalizedPath(locale, item.href)}
           class="font-navbar-link-mobile text-content border-content-10 flex items-center justify-between border-b py-[18px]"
+          target={item.target}
+          rel={item.rel}
+          {...trackAttrs(item.track, item.trackParams)}
         >
           {t(item.label)}
         </a>
@@ -143,7 +151,10 @@ const t = await createTranslator(locale);
     href="#"
     target="_blank"
     rel="noopener"
-    variant="primary">{t("navbar.download_wallet")}</Button
+    variant="primary"
+    data-track="wallet_store_click"
+    data-track-cta-location="nav_mobile"
+    >{t("navbar.download_wallet")}</Button
   >
 </div>
 
@@ -192,11 +203,20 @@ const t = await createTranslator(locale);
 
 <script>
   import { getWalletLink } from "@/scripts/shared/get-wallet-link";
+  import { storeFromHref } from "@/scripts/shared/analytics";
 
   const walletLink = getWalletLink();
+  const store = storeFromHref(walletLink);
 
   document.querySelectorAll(".wallet-cta-link").forEach((el) => {
-    (el as HTMLAnchorElement).href = walletLink;
+    const anchor = el as HTMLAnchorElement;
+    anchor.href = walletLink;
+    if (store) {
+      anchor.dataset.trackStore = store;
+    }
+    if (!anchor.dataset.track) {
+      anchor.dataset.track = "wallet_store_click";
+    }
   });
 </script>
 
diff --git a/website/src/components/ui/AppInformation.astro b/website/src/components/ui/AppInformation.astro
index f277f36..6987984 100644
--- a/website/src/components/ui/AppInformation.astro
+++ b/website/src/components/ui/AppInformation.astro
@@ -45,6 +45,9 @@ const t = await createTranslator(locale);
       href={APP_LINKS.ios}
       target="_blank"
       rel="noopener noreferrer"
+      data-track="wallet_store_click"
+      data-track-store="ios"
+      data-track-cta-location="account"
     >
       {t("app.download.ios")}
     </Button>
@@ -54,6 +57,9 @@ const t = await createTranslator(locale);
       href={APP_LINKS.android}
       target="_blank"
       rel="noopener noreferrer"
+      data-track="wallet_store_click"
+      data-track-store="android"
+      data-track-cta-location="account"
     >
       {t("app.download.android")}
     </Button>
diff --git a/website/src/components/ui/Button.astro b/website/src/components/ui/Button.astro
index 6d32795..72431d2 100644
--- a/website/src/components/ui/Button.astro
+++ b/website/src/components/ui/Button.astro
@@ -14,6 +14,8 @@ export interface Props {
   href?: string;
   target?: string;
   rel?: string;
+  /** Allow data-track* and other passthrough HTML attributes */
+  [key: `data-${string}`]: string | undefined;
 }
 
 const {
diff --git a/website/src/components/ui/CookieConsent.astro b/website/src/components/ui/CookieConsent.astro
index 2419db5..a2557ef 100644
--- a/website/src/components/ui/CookieConsent.astro
+++ b/website/src/components/ui/CookieConsent.astro
@@ -41,6 +41,9 @@ const t = await createTranslator(locale);
 
 <script>
   import env from "@/config";
+  import { initAnalyticsDelegation } from "@/scripts/shared/analytics";
+
+  initAnalyticsDelegation();
 
   class CookieConsentManager {
     private gaId: string;
diff --git a/website/src/components/ui/SiteSocials.astro b/website/src/components/ui/SiteSocials.astro
index 6dd790e..d869b5a 100644
--- a/website/src/components/ui/SiteSocials.astro
+++ b/website/src/components/ui/SiteSocials.astro
@@ -1,6 +1,7 @@
 ---
 import { SITE_SOCIALS, type SiteSocial } from "@/constants/site-socials";
 import { applyStyles } from "@/utils/apply-styles";
+import { trackAttrs } from "@/scripts/shared/analytics";
 
 import SocialX from "@/assets/socials/social-x.svg";
 import SocialIG from "@/assets/socials/social-ig.svg";
@@ -17,6 +18,21 @@ export interface Props {
 const { class: className } = Astro.props;
 
 const socials = Object.entries(SITE_SOCIALS) as [SiteSocial, string][];
+
+const COMMUNITY_CHANNELS = new Set<SiteSocial>([
+  "telegram",
+  "x",
+  "instagram",
+  "youtube",
+]);
+
+function socialTrackAttrs(social: SiteSocial) {
+  if (!COMMUNITY_CHANNELS.has(social)) return {};
+  return trackAttrs("community_click", {
+    channel: social,
+    cta_location: "site_socials",
+  });
+}
 ---
 
 <div class={applyStyles("flex gap-2 min-[360px]:gap-3 flex-wrap", className)}>
@@ -27,6 +43,7 @@ const socials = Object.entries(SITE_SOCIALS) as [SiteSocial, string][];
         target="_blank"
         rel="noopener noreferrer"
         class="text-button-icon bg-button-icon-body flex size-9 cursor-pointer items-center justify-center rounded-full hover:brightness-125 min-[360px]:size-10"
+        {...socialTrackAttrs(social[0])}
       >
         {social[0] === "x" && <SocialX title="Quantus's X account" />}
         {social[0] === "instagram" && (
diff --git a/website/src/constants/footer-navigations.ts b/website/src/constants/footer-navigations.ts
index 8871c86..b73fe04 100644
--- a/website/src/constants/footer-navigations.ts
+++ b/website/src/constants/footer-navigations.ts
@@ -5,6 +5,9 @@ interface Navigation {
     label: string;
     target?: string;
     rel?: string;
+    /** GA4 event name when this link is clicked */
+    track?: string;
+    trackParams?: Record<string, string>;
   }[];
 }
 
@@ -22,6 +25,8 @@ export const FOOTER_NAVIGATIONS: Navigation[] = [
         href: "https://explorer.quantus.com/",
         target: "_blank",
         rel: "noopener noreferrer",
+        track: "explorer_click",
+        trackParams: { cta_location: "footer" },
       },
       { label: "footer.links.wallet", href: "/wallet" },
       {
@@ -35,6 +40,8 @@ export const FOOTER_NAVIGATIONS: Navigation[] = [
         href: "https://docs.quantus.com/",
         target: "_blank",
         rel: "noopener noreferrer",
+        track: "docs_click",
+        trackParams: { cta_location: "footer" },
       },
       {
         label: "footer.links.github",
@@ -52,24 +59,32 @@ export const FOOTER_NAVIGATIONS: Navigation[] = [
         href: "https://t.me/quantusnetwork",
         target: "_blank",
         rel: "noopener noreferrer",
+        track: "community_click",
+        trackParams: { channel: "telegram", cta_location: "footer" },
       },
       {
         label: "footer.links.x",
         href: "https://x.com/QuantusNetwork",
         target: "_blank",
         rel: "noopener noreferrer",
+        track: "community_click",
+        trackParams: { channel: "x", cta_location: "footer" },
       },
       {
         label: "footer.links.instagram",
         href: "https://www.instagram.com/quantusnetwork/",
         target: "_blank",
         rel: "noopener noreferrer",
+        track: "community_click",
+        trackParams: { channel: "instagram", cta_location: "footer" },
       },
       {
         label: "footer.links.youtube",
         href: "https://www.youtube.com/@QuantusNetwork",
         target: "_blank",
         rel: "noopener noreferrer",
+        track: "community_click",
+        trackParams: { channel: "youtube", cta_location: "footer" },
       },
     ],
   },
diff --git a/website/src/constants/site-navigations.ts b/website/src/constants/site-navigations.ts
index ac5b35f..a470592 100644
--- a/website/src/constants/site-navigations.ts
+++ b/website/src/constants/site-navigations.ts
@@ -3,6 +3,9 @@ interface Navigation {
   label: string;
   target?: string;
   rel?: string;
+  /** GA4 event name when this link is clicked */
+  track?: string;
+  trackParams?: Record<string, string>;
 }
 
 export const SITE_NAVIGATIONS: Navigation[] = [
@@ -15,6 +18,8 @@ export const SITE_NAVIGATIONS: Navigation[] = [
     target: "_blank",
     rel: "noopener noreferrer",
     label: "navbar.docs",
+    track: "docs_click",
+    trackParams: { cta_location: "nav" },
   },
   {
     href: "/quantum-risk-checker/",
diff --git a/website/src/pages/[lang]/404.astro b/website/src/pages/[lang]/404.astro
index e3e6f91..33e860c 100644
--- a/website/src/pages/[lang]/404.astro
+++ b/website/src/pages/[lang]/404.astro
@@ -2,10 +2,10 @@
 import Layout from "@/components/layout/Layout.astro";
 import Button from "@/components/ui/Button.astro";
 import { createMetadata } from "@/utils/create-metadata";
-import { SUPPORTED_LOCALES } from "@/utils/i18n";
+import { PREFIXED_LOCALES } from "@/utils/i18n";
 
 export async function getStaticPaths() {
-  return SUPPORTED_LOCALES.map((lang) => ({ params: { lang } }));
+  return PREFIXED_LOCALES.map((lang) => ({ params: { lang } }));
 }
 
 const metadata = createMetadata({
diff --git a/website/src/pages/[lang]/about.astro b/website/src/pages/[lang]/about.astro
index b518fc6..dd8a4da 100644
--- a/website/src/pages/[lang]/about.astro
+++ b/website/src/pages/[lang]/about.astro
@@ -3,7 +3,7 @@ import Layout from "@/components/layout/Layout.astro";
 import {
   createTranslator,
   getLocaleFromUrl,
-  SUPPORTED_LOCALES,
+  PREFIXED_LOCALES,
 } from "@/utils/i18n";
 import { createMetadata } from "@/utils/create-metadata";
 import { JsonLdGraph } from "@/utils/build-json-ld";
@@ -20,7 +20,7 @@ import AdvisorsAndInvestorsSection from "@/components/features/about/AdvisorsAnd
 import ContactSection from "@/components/features/about/ContactSection.astro";
 
 export async function getStaticPaths() {
-  return SUPPORTED_LOCALES.map((lang) => ({ params: { lang } }));
+  return PREFIXED_LOCALES.map((lang) => ({ params: { lang } }));
 }
 
 const locale = getLocaleFromUrl(Astro.url.pathname);
diff --git a/website/src/pages/[lang]/blog/[...slug].astro b/website/src/pages/[lang]/blog/[...slug].astro
index f0dfda8..0a3d583 100644
--- a/website/src/pages/[lang]/blog/[...slug].astro
+++ b/website/src/pages/[lang]/blog/[...slug].astro
@@ -1,7 +1,7 @@
 ---
 import { type CollectionEntry, getCollection, render } from "astro:content";
 import BlogPost from "@/components/features/blog/BlogPost.astro";
-import { DEFAULT_LOCALE, SUPPORTED_LOCALES, type Locale } from "@/utils/i18n";
+import { DEFAULT_LOCALE, PREFIXED_LOCALES, SUPPORTED_LOCALES, type Locale } from "@/utils/i18n";
 
 export async function getStaticPaths() {
   const posts = await getCollection("blog");
@@ -21,9 +21,9 @@ export async function getStaticPaths() {
     };
   });
 
-  // Filter paths to ensure only supported locales are generated
+  // Prefixed locales only — default English lives at unprefixed /blog/...
   return paths.filter(({ params }) =>
-    SUPPORTED_LOCALES.includes(params.lang as Locale),
+    PREFIXED_LOCALES.includes(params.lang as Locale),
   );
 }
 
diff --git a/website/src/pages/[lang]/blog/index.astro b/website/src/pages/[lang]/blog/index.astro
index 4706cc5..14ec932 100644
--- a/website/src/pages/[lang]/blog/index.astro
+++ b/website/src/pages/[lang]/blog/index.astro
@@ -6,12 +6,12 @@ import {
   getLocaleFromUrl,
   getLocalizedPath,
   createTranslator,
-  SUPPORTED_LOCALES,
+  PREFIXED_LOCALES,
 } from "@/utils/i18n";
 import { createMetadata } from "@/utils/create-metadata";
 
 export async function getStaticPaths() {
-  return SUPPORTED_LOCALES.map((lang) => ({ params: { lang } }));
+  return PREFIXED_LOCALES.map((lang) => ({ params: { lang } }));
 }
 
 const locale = getLocaleFromUrl(Astro.url.pathname);
diff --git a/website/src/pages/[lang]/blog/tags/[tag].astro b/website/src/pages/[lang]/blog/tags/[tag].astro
index be713c5..4397a01 100644
--- a/website/src/pages/[lang]/blog/tags/[tag].astro
+++ b/website/src/pages/[lang]/blog/tags/[tag].astro
@@ -6,7 +6,7 @@ import {
   getLocaleFromUrl,
   getLocalizedPath,
   createTranslator,
-  SUPPORTED_LOCALES,
+  PREFIXED_LOCALES,
 } from "@/utils/i18n";
 import { createMetadata } from "@/utils/create-metadata";
 
@@ -14,7 +14,7 @@ export async function getStaticPaths() {
   const allPosts = await getCollection("blog");
   const paths = [];
 
-  for (const lang of SUPPORTED_LOCALES) {
+  for (const lang of PREFIXED_LOCALES) {
     const langPosts = allPosts.filter((post) =>
       post.id.toLowerCase().startsWith(`${lang.toLowerCase()}/`),
     );
diff --git a/website/src/pages/[lang]/community.astro b/website/src/pages/[lang]/community.astro
index 885a3e9..2222de5 100644
--- a/website/src/pages/[lang]/community.astro
+++ b/website/src/pages/[lang]/community.astro
@@ -3,7 +3,7 @@ import Layout from "@/components/layout/Layout.astro";
 import {
   createTranslator,
   getLocaleFromUrl,
-  SUPPORTED_LOCALES,
+  PREFIXED_LOCALES,
 } from "@/utils/i18n";
 import { createMetadata } from "@/utils/create-metadata";
 import { JsonLdGraph } from "@/utils/build-json-ld";
@@ -21,7 +21,7 @@ import TelegramSection from "@/components/features/community/TelegramSection.ast
 import SocialsSection from "@/components/features/community/SocialsSection.astro";
 
 export async function getStaticPaths() {
-  return SUPPORTED_LOCALES.map((lang) => ({ params: { lang } }));
+  return PREFIXED_LOCALES.map((lang) => ({ params: { lang } }));
 }
 
 const locale = getLocaleFromUrl(Astro.url.pathname);
diff --git a/website/src/pages/[lang]/index.astro b/website/src/pages/[lang]/index.astro
index 8069329..fe62fff 100644
--- a/website/src/pages/[lang]/index.astro
+++ b/website/src/pages/[lang]/index.astro
@@ -3,7 +3,7 @@ import Layout from "@/components/layout/Layout.astro";
 import {
   createTranslator,
   getLocaleFromUrl,
-  SUPPORTED_LOCALES,
+  PREFIXED_LOCALES,
 } from "@/utils/i18n";
 import { createMetadata } from "@/utils/create-metadata";
 import { JsonLdGraph } from "@/utils/build-json-ld";
@@ -23,7 +23,7 @@ import BlogSection from "@/components/features/home/BlogSection.astro";
 import NewsletterSection from "@/components/features/home/NewsletterSection.astro";
 
 export async function getStaticPaths() {
-  return SUPPORTED_LOCALES.map((lang) => ({ params: { lang } }));
+  return PREFIXED_LOCALES.map((lang) => ({ params: { lang } }));
 }
 
 const locale = getLocaleFromUrl(Astro.url.pathname);
diff --git a/website/src/pages/[lang]/privacy-policy.astro b/website/src/pages/[lang]/privacy-policy.astro
index 985a76e..d35bd16 100644
--- a/website/src/pages/[lang]/privacy-policy.astro
+++ b/website/src/pages/[lang]/privacy-policy.astro
@@ -5,7 +5,7 @@ import Layout from "@/components/layout/Layout.astro";
 import {
   createTranslator,
   getLocaleFromUrl,
-  SUPPORTED_LOCALES,
+  PREFIXED_LOCALES,
 } from "@/utils/i18n";
 import { createMetadata } from "@/utils/create-metadata";
 import { JsonLdGraph } from "@/utils/build-json-ld";
@@ -17,7 +17,7 @@ import {
 } from "@/constants/default-jsonld";
 
 export async function getStaticPaths() {
-  return SUPPORTED_LOCALES.map((lang) => ({ params: { lang } }));
+  return PREFIXED_LOCALES.map((lang) => ({ params: { lang } }));
 }
 
 const locale = getLocaleFromUrl(Astro.url.pathname);
diff --git a/website/src/pages/[lang]/quantum-risk-checker.astro b/website/src/pages/[lang]/quantum-risk-checker.astro
index 8180c07..35dc9be 100644
--- a/website/src/pages/[lang]/quantum-risk-checker.astro
+++ b/website/src/pages/[lang]/quantum-risk-checker.astro
@@ -3,7 +3,7 @@ import Layout from "@/components/layout/Layout.astro";
 import {
   createTranslator,
   getLocaleFromUrl,
-  SUPPORTED_LOCALES,
+  PREFIXED_LOCALES,
 } from "@/utils/i18n";
 import { createMetadata } from "@/utils/create-metadata";
 import { JsonLdGraph } from "@/utils/build-json-ld";
@@ -19,7 +19,7 @@ import MethodSection from "@/components/features/qday-checker/MethodSection.astr
 import AdviceSection from "@/components/features/qday-checker/AdviceSection.astro";
 
 export async function getStaticPaths() {
-  return SUPPORTED_LOCALES.map((lang) => ({ params: { lang } }));
+  return PREFIXED_LOCALES.map((lang) => ({ params: { lang } }));
 }
 
 const locale = getLocaleFromUrl(Astro.url.pathname);
diff --git a/website/src/pages/[lang]/technology.astro b/website/src/pages/[lang]/technology.astro
index aae13ec..e415532 100644
--- a/website/src/pages/[lang]/technology.astro
+++ b/website/src/pages/[lang]/technology.astro
@@ -3,7 +3,7 @@ import Layout from "@/components/layout/Layout.astro";
 import {
   createTranslator,
   getLocaleFromUrl,
-  SUPPORTED_LOCALES,
+  PREFIXED_LOCALES,
 } from "@/utils/i18n";
 import { createMetadata } from "@/utils/create-metadata";
 import { JsonLdGraph } from "@/utils/build-json-ld";
@@ -21,7 +21,7 @@ import ConsensusSection from "@/components/features/technology/ConsensusSection.
 import CtaSection from "@/components/features/technology/CtaSection.astro";
 
 export async function getStaticPaths() {
-  return SUPPORTED_LOCALES.map((lang) => ({ params: { lang } }));
+  return PREFIXED_LOCALES.map((lang) => ({ params: { lang } }));
 }
 
 const locale = getLocaleFromUrl(Astro.url.pathname);
diff --git a/website/src/pages/[lang]/terms.astro b/website/src/pages/[lang]/terms.astro
index 4ce72fe..35e2b6e 100644
--- a/website/src/pages/[lang]/terms.astro
+++ b/website/src/pages/[lang]/terms.astro
@@ -5,7 +5,7 @@ import Layout from "@/components/layout/Layout.astro";
 import {
   createTranslator,
   getLocaleFromUrl,
-  SUPPORTED_LOCALES,
+  PREFIXED_LOCALES,
 } from "@/utils/i18n";
 import { createMetadata } from "@/utils/create-metadata";
 import { JsonLdGraph } from "@/utils/build-json-ld";
@@ -17,7 +17,7 @@ import {
 } from "@/constants/default-jsonld";
 
 export async function getStaticPaths() {
-  return SUPPORTED_LOCALES.map((lang) => ({ params: { lang } }));
+  return PREFIXED_LOCALES.map((lang) => ({ params: { lang } }));
 }
 
 const locale = getLocaleFromUrl(Astro.url.pathname);
diff --git a/website/src/pages/[lang]/wallet.astro b/website/src/pages/[lang]/wallet.astro
index b1ecab4..a1bd19b 100644
--- a/website/src/pages/[lang]/wallet.astro
+++ b/website/src/pages/[lang]/wallet.astro
@@ -3,7 +3,7 @@ import Layout from "@/components/layout/Layout.astro";
 import {
   createTranslator,
   getLocaleFromUrl,
-  SUPPORTED_LOCALES,
+  PREFIXED_LOCALES,
 } from "@/utils/i18n";
 import { createMetadata } from "@/utils/create-metadata";
 import { JsonLdGraph } from "@/utils/build-json-ld";
@@ -20,7 +20,7 @@ import IssuesSection from "@/components/features/wallet/IssuesSection.astro";
 import CtaSection from "@/components/features/wallet/CtaSection.astro";
 
 export async function getStaticPaths() {
-  return SUPPORTED_LOCALES.map((lang) => ({ params: { lang } }));
+  return PREFIXED_LOCALES.map((lang) => ({ params: { lang } }));
 }
 
 const locale = getLocaleFromUrl(Astro.url.pathname);
diff --git a/website/src/pages/[lang]/whitepaper.astro b/website/src/pages/[lang]/whitepaper.astro
index eaa9b84..166dff3 100644
--- a/website/src/pages/[lang]/whitepaper.astro
+++ b/website/src/pages/[lang]/whitepaper.astro
@@ -4,7 +4,7 @@ import Layout from "@/components/layout/Layout.astro";
 import {
   getLocaleFromUrl,
   createTranslator,
-  SUPPORTED_LOCALES,
+  PREFIXED_LOCALES,
 } from "@/utils/i18n";
 import { JsonLdGraph } from "@/utils/build-json-ld";
 import { getWhitepaperJsonLd } from "@/constants/default-jsonld";
@@ -22,7 +22,7 @@ import {
 import WhitepaperPrintCover from "@/components/features/whitepaper/WhitepaperPrintCover.astro";
 
 export async function getStaticPaths() {
-  return SUPPORTED_LOCALES.map((lang) => ({ params: { lang } }));
+  return PREFIXED_LOCALES.map((lang) => ({ params: { lang } }));
 }
 
 const locale = getLocaleFromUrl(Astro.url.pathname);
diff --git a/website/src/pages/[lang]/whitepaper/[version].astro b/website/src/pages/[lang]/whitepaper/[version].astro
index 4d61e38..bea56c4 100644
--- a/website/src/pages/[lang]/whitepaper/[version].astro
+++ b/website/src/pages/[lang]/whitepaper/[version].astro
@@ -4,7 +4,7 @@ import Layout from "@/components/layout/Layout.astro";
 import {
   getLocaleFromUrl,
   createTranslator,
-  SUPPORTED_LOCALES,
+  PREFIXED_LOCALES,
 } from "@/utils/i18n";
 import { JsonLdGraph } from "@/utils/build-json-ld";
 import { getWhitepaperJsonLd } from "@/constants/default-jsonld";
@@ -26,7 +26,7 @@ export async function getStaticPaths() {
   const allEntries = await getCollection("whitepaper");
   const paths: { params: { lang: string; version: string } }[] = [];
 
-  for (const lang of SUPPORTED_LOCALES) {
+  for (const lang of PREFIXED_LOCALES) {
     const langEntries = allEntries.filter((e) =>
       e.id.toLowerCase().startsWith(`${lang.toLowerCase()}/`),
     );
diff --git a/website/src/pages/invite.astro b/website/src/pages/invite.astro
index 447902d..4bd4d20 100644
--- a/website/src/pages/invite.astro
+++ b/website/src/pages/invite.astro
@@ -46,6 +46,9 @@ const metadata = createMetadata({
               href={APP_LINKS.ios}
               target="_blank"
               rel="noopener noreferrer"
+              data-track="wallet_store_click"
+              data-track-store="ios"
+              data-track-cta-location="invite"
             >
               {t("invite.download.ios")}
             </Button>
@@ -55,6 +58,9 @@ const metadata = createMetadata({
               href={APP_LINKS.android}
               target="_blank"
               rel="noopener noreferrer"
+              data-track="wallet_store_click"
+              data-track-store="android"
+              data-track-cta-location="invite"
             >
               {t("invite.download.android")}
             </Button>
diff --git a/website/src/scripts/shared/analytics.ts b/website/src/scripts/shared/analytics.ts
new file mode 100644
index 0000000..51feafd
--- /dev/null
+++ b/website/src/scripts/shared/analytics.ts
@@ -0,0 +1,152 @@
+declare global {
+  interface Window {
+    gtag?: (...args: unknown[]) => void;
+    dataLayer?: unknown[];
+  }
+}
+
+const CONSENT_KEY = "cookie-consent";
+
+export type AnalyticsParams = Record<string, string | number | boolean>;
+
+type PageType =
+  | "home"
+  | "wallet"
+  | "about"
+  | "community"
+  | "whitepaper"
+  | "risk_checker"
+  | "blog"
+  | "technology"
+  | "other";
+
+let delegationInitialized = false;
+
+function hasAnalyticsConsent(): boolean {
+  try {
+    const stored = localStorage.getItem(CONSENT_KEY);
+    return stored ? JSON.parse(stored) === true : false;
+  } catch {
+    return false;
+  }
+}
+
+function stripLocalePrefix(pathname: string): string {
+  const segments = pathname.split("/").filter(Boolean);
+  if (
+    segments.length > 0 &&
+    /^[a-z]{2}-[A-Z]{2}$/.test(segments[0])
+  ) {
+    return "/" + segments.slice(1).join("/");
+  }
+  return pathname === "" ? "/" : pathname;
+}
+
+export function getPageType(pathname = window.location.pathname): PageType {
+  const path = stripLocalePrefix(pathname).replace(/\/$/, "") || "/";
+
+  if (path === "/") return "home";
+  if (path.startsWith("/wallet")) return "wallet";
+  if (path.startsWith("/about")) return "about";
+  if (path.startsWith("/community")) return "community";
+  if (path.startsWith("/whitepaper")) return "whitepaper";
+  if (path.startsWith("/quantum-risk-checker") || path.startsWith("/risk-checker"))
+    return "risk_checker";
+  if (path.startsWith("/blog") || path.startsWith("/blogs")) return "blog";
+  if (path.startsWith("/technology")) return "technology";
+  return "other";
+}
+
+export function storeFromHref(href: string): "ios" | "android" | undefined {
+  try {
+    const url = new URL(href, window.location.origin);
+    if (url.hostname.includes("apple.com")) return "ios";
+    if (url.hostname.includes("play.google.com") || url.hostname.includes("google.com"))
+      return "android";
+  } catch {
+    // ignore invalid URLs
+  }
+  return undefined;
+}
+
+/**
+ * Fire a GA4 event when the visitor has accepted analytics cookies and gtag is loaded.
+ * Automatically attaches language_code and page_type.
+ */
+export function trackEvent(
+  name: string,
+  params: AnalyticsParams = {},
+): void {
+  if (!hasAnalyticsConsent() || typeof window.gtag !== "function") {
+    return;
+  }
+
+  window.gtag("event", name, {
+    language_code: document.documentElement.lang || "en-US",
+    page_type: getPageType(),
+    ...params,
+  });
+}
+
+function datasetKeyToParam(key: string): string | null {
+  // data-track-cta-location → cta_location; data-track → skip (event name)
+  if (key === "track") return null;
+  if (!key.startsWith("track")) return null;
+  const rest = key.slice("track".length); // e.g. "CtaLocation" or "Store"
+  if (!rest) return null;
+  return rest
+    .replace(/^[A-Z]/, (c) => c.toLowerCase())
+    .replace(/[A-Z]/g, (c) => `_${c.toLowerCase()}`);
+}
+
+function paramsFromElement(el: HTMLElement): AnalyticsParams {
+  const params: AnalyticsParams = {};
+  for (const [key, value] of Object.entries(el.dataset)) {
+    if (value === undefined) continue;
+    const param = datasetKeyToParam(key);
+    if (param) params[param] = value;
+  }
+  return params;
+}
+
+function handleDelegatedClick(event: MouseEvent): void {
+  const target = event.target;
+  if (!(target instanceof Element)) return;
+
+  const el = target.closest<HTMLElement>("[data-track]");
+  if (!el) return;
+
+  const eventName = el.dataset.track;
+  if (!eventName) return;
+
+  trackEvent(eventName, paramsFromElement(el));
+}
+
+/**
+ * Attach a single document-level click listener for [data-track] elements.
+ * Safe to call multiple times (idempotent).
+ */
+export function initAnalyticsDelegation(): void {
+  if (delegationInitialized || typeof document === "undefined") return;
+  document.addEventListener("click", handleDelegatedClick, true);
+  delegationInitialized = true;
+}
+
+/**
+ * Build HTML data-track* attributes for Astro/markup spreads.
+ * e.g. trackAttrs("community_click", { channel: "x" })
+ *   → { "data-track": "community_click", "data-track-channel": "x" }
+ */
+export function trackAttrs(
+  track?: string,
+  params?: Record<string, string>,
+): Record<string, string> {
+  if (!track) return {};
+  const attrs: Record<string, string> = { "data-track": track };
+  if (params) {
+    for (const [key, value] of Object.entries(params)) {
+      attrs[`data-track-${key.replace(/_/g, "-")}`] = value;
+    }
+  }
+  return attrs;
+}
diff --git a/website/src/utils/i18n.ts b/website/src/utils/i18n.ts
index 980a94e..ff64078 100644
--- a/website/src/utils/i18n.ts
+++ b/website/src/utils/i18n.ts
@@ -34,6 +34,11 @@ export const HOMEPAGE_LINK = SUPPORTED_LOCALES.map((locale) => {
 
 export const DEFAULT_LOCALE: Locale = "en-US";
 
+/** Locales that use a URL path prefix (excludes default English at root). */
+export const PREFIXED_LOCALES = SUPPORTED_LOCALES.filter(
+  (locale) => locale !== DEFAULT_LOCALE,
+);
+
 export const LOCALES_MAP: Record<string, string> = {
   // URL-path: hreflang-value
   "en-US": "en-US",
@@ -177,15 +182,7 @@ export async function createTranslator(locale: Locale) {
 export function getLocalizedPath(locale: Locale, pathname: string): string {
   if (pathname.includes("http")) return pathname;
 
-  // If it's the default language, don't add a prefix.
-  if (locale === DEFAULT_LOCALE) {
-    return pathname;
-  }
-
-  // For other languages, add the language prefix.
-  // Make sure the path starts with a slash for consistency.
-  const finalPath = pathname.startsWith("/") ? pathname : `/${pathname}`;
-  return `/${locale}${finalPath}`;
+  return addLocaleToUrl(pathname, locale);
 }
 
 /**
@@ -203,28 +200,44 @@ export function getLocaleFromUrl(pathname: string): Locale {
 }
 
 /**
- * Remove locale from URL pathname
+ * Remove locale from URL pathname.
+ * Strips any supported locale prefix (including nested `/zh-CN/en-US/...`)
+ * and preserves a trailing slash when the input had one.
  */
 export function removeLocaleFromUrl(pathname: string): string {
-  const locale = getLocaleFromUrl(pathname);
+  let path = pathname || "/";
+  const hadTrailingSlash = path.length > 1 && path.endsWith("/");
 
-  if (locale === DEFAULT_LOCALE) {
-    return pathname;
+  while (true) {
+    const segments = path.split("/").filter(Boolean);
+    const potentialLocale = segments[0] as Locale;
+
+    if (!SUPPORTED_LOCALES.includes(potentialLocale)) {
+      break;
+    }
+
+    const rest = segments.slice(1).join("/");
+    path = rest ? `/${rest}` : "/";
+  }
+
+  if (path !== "/" && hadTrailingSlash && !path.endsWith("/")) {
+    path += "/";
   }
 
-  return pathname.replace(`/${locale}`, "") || "/";
+  return path;
 }
 
 /**
  * Add locale to URL pathname
  */
 export function addLocaleToUrl(pathname: string, locale: Locale): string {
-  // Don't add locale for default locale
+  const cleanPath = removeLocaleFromUrl(pathname);
+
+  // Default English lives at the root (no prefix).
   if (locale === DEFAULT_LOCALE) {
-    return pathname;
+    return cleanPath;
   }
 
-  const cleanPath = removeLocaleFromUrl(pathname);
   return `/${locale}${cleanPath === "/" ? "" : cleanPath}`;
 }