diff --git a/src/content/spec/i18n/avoid-auto-geo-redirects.md b/src/content/spec/i18n/avoid-auto-geo-redirects.md
index b42eb15d..c94486d8 100644
--- a/src/content/spec/i18n/avoid-auto-geo-redirects.md
+++ b/src/content/spec/i18n/avoid-auto-geo-redirects.md
@@ -15,7 +15,7 @@ sources:
   - title: "W3C i18n — When should I use language negotiation?"
     url: "https://www.w3.org/International/questions/qa-when-lang-neg"
     publisher: "W3C"
-  - title: "W3C i18n — Using language selectors"
+  - title: "W3C i18n — Using select to link to localized content"
     url: "https://www.w3.org/International/questions/qa-navigation-select"
     publisher: "W3C"
 ---
diff --git a/src/content/spec/i18n/hreflang.md b/src/content/spec/i18n/hreflang.md
index 40b0ea50..d0b8d081 100644
--- a/src/content/spec/i18n/hreflang.md
+++ b/src/content/spec/i18n/hreflang.md
@@ -9,7 +9,7 @@ appliesTo: [all]
 relatedSlugs: [lang-attribute, locale-content, rtl-support, international-url-structure, sitemap-hreflang, localised-metadata, language-switcher, avoid-auto-geo-redirects]
 updated: "2026-07-09T00:00:00.000Z"
 sources:
-  - title: "Google Search Central — Localized versions of your pages"
+  - title: "Google Search Central — Tell Google about localized versions of your page"
     url: "https://developers.google.com/search/docs/specialty/international/localized-versions"
     publisher: "Google Search Central"
   - title: "BCP 47 — Tags for Identifying Languages"
diff --git a/src/content/spec/i18n/language-switcher.md b/src/content/spec/i18n/language-switcher.md
index df9bbffd..292ed45d 100644
--- a/src/content/spec/i18n/language-switcher.md
+++ b/src/content/spec/i18n/language-switcher.md
@@ -9,7 +9,7 @@ appliesTo: [all]
 relatedSlugs: [hreflang, lang-attribute, avoid-auto-geo-redirects, international-url-structure]
 updated: "2026-05-29T18:54:03.000Z"
 sources:
-  - title: "W3C i18n — Using language selectors"
+  - title: "W3C i18n — Using select to link to localized content"
     url: "https://www.w3.org/International/questions/qa-navigation-select"
     publisher: "W3C"
   - title: "W3C — Internationalization Quick Tips for the Web"
diff --git a/src/content/spec/i18n/locale-content.md b/src/content/spec/i18n/locale-content.md
index fe2e6cac..82f01165 100644
--- a/src/content/spec/i18n/locale-content.md
+++ b/src/content/spec/i18n/locale-content.md
@@ -13,7 +13,7 @@ sources:
     url: "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl"
     publisher: "MDN"
   - title: "W3C i18n — Working with language and locale"
-    url: "https://www.w3.org/International/articlelist#locales"
+    url: "https://www.w3.org/International/articlelist"
     publisher: "W3C"
   - title: "MDN — Accept-Language header"
     url: "https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/Accept-Language"
diff --git a/src/content/spec/resilience/error-pages.md b/src/content/spec/resilience/error-pages.md
index ec3d9272..c31a5fda 100644
--- a/src/content/spec/resilience/error-pages.md
+++ b/src/content/spec/resilience/error-pages.md
@@ -15,8 +15,8 @@ sources:
   - title: "RFC 9110 — HTTP Semantics: 500 Internal Server Error"
     url: "https://www.rfc-editor.org/rfc/rfc9110.html#name-500-internal-server-error"
     publisher: "IETF"
-  - title: "Google Search Central — Soft 404 errors"
-    url: "https://developers.google.com/search/docs/crawling-indexing/http-network-errors#soft-404-errors"
+  - title: "Google Search Central — How HTTP status codes affect Google's crawlers"
+    url: "https://developers.google.com/search/docs/crawling-indexing/http-network-errors"
     publisher: "Google Search Central"
   - title: "MDN — HTTP response status codes"
     url: "https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Status"
diff --git a/src/content/spec/resilience/offline-support.md b/src/content/spec/resilience/offline-support.md
index fdab484f..a2de8da6 100644
--- a/src/content/spec/resilience/offline-support.md
+++ b/src/content/spec/resilience/offline-support.md
@@ -15,7 +15,7 @@ sources:
   - title: "MDN — Using Service Workers"
     url: "https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API/Using_Service_Workers"
     publisher: "MDN"
-  - title: "web.dev — Offline cookbook"
+  - title: "web.dev — Common techniques to build offline applications"
     url: "https://web.dev/articles/offline-cookbook"
     publisher: "web.dev"
   - title: "W3C — Service Workers"
diff --git a/src/content/spec/seo/soft-404.md b/src/content/spec/seo/soft-404.md
index 511060b0..fbc55e32 100644
--- a/src/content/spec/seo/soft-404.md
+++ b/src/content/spec/seo/soft-404.md
@@ -9,8 +9,8 @@ appliesTo: [all]
 relatedSlugs: [redirects, url-structure, server-side-rendering]
 updated: "2026-05-29T09:13:20.000Z"
 sources:
-  - title: "Soft 404 errors"
-    url: "https://developers.google.com/search/docs/crawling-indexing/http-network-errors#soft-404-errors"
+  - title: "Google Search Central — How HTTP status codes affect Google's crawlers"
+    url: "https://developers.google.com/search/docs/crawling-indexing/http-network-errors"
     publisher: "Google Search Central"
   - title: "RFC 9110 — 404 Not Found"
     url: "https://www.rfc-editor.org/rfc/rfc9110.html#name-404-not-found"