diff --git a/content/billing/managing-licenses-for-visual-studio-subscriptions-with-github-enterprise/about-visual-studio-subscriptions-with-github-enterprise.md b/content/billing/managing-licenses-for-visual-studio-subscriptions-with-github-enterprise/about-visual-studio-subscriptions-with-github-enterprise.md
index b72f3bfdc6..9ee8a21c06 100644
--- a/content/billing/managing-licenses-for-visual-studio-subscriptions-with-github-enterprise/about-visual-studio-subscriptions-with-github-enterprise.md
+++ b/content/billing/managing-licenses-for-visual-studio-subscriptions-with-github-enterprise/about-visual-studio-subscriptions-with-github-enterprise.md
@@ -29,7 +29,7 @@ For more information about the setup of {% data variables.visual_studio.prodname
 
 ## About licenses for {% data variables.visual_studio.prodname_vss_ghec %}
 
-After you assign a license for {% data variables.visual_studio.prodname_vss_ghec %} to a subscriber, the subscriber will use the {% data variables.product.prodname_enterprise %} portion of the license by joining an organization in your enterprise with a personal account on {% data variables.product.prodname_dotcom_the_website %}. If the verified email address for the personal account of an enterprise member on {% data variables.product.prodname_dotcom_the_website %} matches the User Primary Name (UPN) for a subscriber to your {% data variables.product.prodname_vs %} account, the {% data variables.product.prodname_vs %} subscriber will automatically consume one license for {% data variables.visual_studio.prodname_vss_ghec %}.
+After you assign a license for {% data variables.visual_studio.prodname_vss_ghec %} to a subscriber, the subscriber will use the {% data variables.product.prodname_enterprise %} portion of the license by joining an organization in your enterprise with a personal account on {% data variables.product.prodname_dotcom_the_website %}. If the verified email address for the personal account of an enterprise member on {% data variables.product.prodname_dotcom_the_website %} matches the User Principal Name (UPN) for a subscriber to your {% data variables.product.prodname_vs %} account, the {% data variables.product.prodname_vs %} subscriber will automatically consume one license for {% data variables.visual_studio.prodname_vss_ghec %}.
 
 {% note %}
 
diff --git a/src/events/lib/schema.js b/src/events/lib/schema.js
index b94b805269..fda06a733d 100644
--- a/src/events/lib/schema.js
+++ b/src/events/lib/schema.js
@@ -405,7 +405,6 @@ const experiment = {
     },
     experiment_variation: {
       type: 'string',
-      enum: ['control', 'treatment'],
       description: 'The variation this user we bucketed in, such as control or treatment.',
     },
     experiment_success: {
diff --git a/src/landings/components/MeasureLanguageCookieMatch.ts b/src/landings/components/MeasureLanguageCookieMatch.ts
new file mode 100644
index 0000000000..fc937992d1
--- /dev/null
+++ b/src/landings/components/MeasureLanguageCookieMatch.ts
@@ -0,0 +1,47 @@
+/**
+ * This component tests if the user has a language cookie whose
+ * value does not match the current URL. For example, the user has,
+ * at some point, explictitly selected a language in the drop-down
+ * but is now on a URL whose language prefix is not the same.
+ * We're curious to see how often this happens in the wild.
+ *
+ * This experiment is meant to be temporary. At least until we know and
+ * have documented how often this happens.
+ *
+ */
+
+import { useEffect } from 'react'
+import { useRouter } from 'next/router'
+import Cookies from 'js-cookie'
+
+import { sendEvent, EventType } from 'src/events/components/events'
+
+const EXPERIMENT_NAME = 'language_cookie_match'
+
+const COOKIE_KEY = 'user_language'
+
+function sendExperimentResult(desiredLanguage: string, matched: boolean) {
+  sendEvent({
+    type: EventType.experiment,
+    experiment_name: EXPERIMENT_NAME,
+    experiment_variation: desiredLanguage,
+    experiment_success: matched,
+  })
+}
+
+export function MeasureLanguageCookieMismatch() {
+  const { locale } = useRouter()
+
+  useEffect(() => {
+    try {
+      const cookie = Cookies.get(COOKIE_KEY)
+      if (cookie) {
+        sendExperimentResult(cookie, cookie === locale)
+      }
+    } catch (error) {
+      console.error('Error measuring language cookie match', error)
+    }
+  }, [locale])
+
+  return null
+}
diff --git a/src/landings/pages/home.tsx b/src/landings/pages/home.tsx
index 728485237e..08c64b6213 100644
--- a/src/landings/pages/home.tsx
+++ b/src/landings/pages/home.tsx
@@ -14,6 +14,7 @@ import { ArticleList } from 'src/landings/components/ArticleList'
 import { HomePageHero } from 'src/landings/components/HomePageHero'
 import type { ProductGroupT } from 'src/landings/components/ProductSelections'
 import { ProductSelections } from 'src/landings/components/ProductSelections'
+import { MeasureLanguageCookieMismatch } from '../components/MeasureLanguageCookieMatch'
 
 type FeaturedLink = {
   href: string
@@ -72,6 +73,7 @@ function HomePage(props: HomePageProps) {
             </div>
           </div>
         </div>
+        <MeasureLanguageCookieMismatch />
       </div>
     </div>
   )
diff --git a/src/landings/pages/product.tsx b/src/landings/pages/product.tsx
index 5f19a7e697..981c1e082e 100644
--- a/src/landings/pages/product.tsx
+++ b/src/landings/pages/product.tsx
@@ -6,6 +6,7 @@ import { useRouter } from 'next/router'
 import copyCode from 'src/frame/components/lib/copy-code'
 import toggleAnnotation from 'src/frame/components/lib/toggle-annotations'
 import wrapCodeTerms from 'src/frame/components/lib/wrap-code-terms'
+import { MeasureLanguageCookieMismatch } from '../components/MeasureLanguageCookieMatch'
 
 import {
   MainContextT,
@@ -109,7 +110,12 @@ const GlobalPage = ({
     }
   }
 
-  return <MainContext.Provider value={mainContext}>{content}</MainContext.Provider>
+  return (
+    <MainContext.Provider value={mainContext}>
+      {content}
+      <MeasureLanguageCookieMismatch />
+    </MainContext.Provider>
+  )
 }
 
 export default GlobalPage