diff --git a/src/components/LanguageSwitcher.astro b/src/components/LanguageSwitcher.astro
index bb23d2a..bbfd519 100644
--- a/src/components/LanguageSwitcher.astro
+++ b/src/components/LanguageSwitcher.astro
@@ -154,6 +154,8 @@ const checkBase = "wr:size-4 wr:opacity-0 wr:scale-90 wr:transition";
     if (typeof fn === "function") {
       try { fn(code); } catch (e) { console.warn("onChange handler threw", e); }
     }
+
+    window.dispatchEvent(new CustomEvent("wr:language:changed", { detail: { code } }));
   }
 
   // initialize from (1) cookie, (2) localStorage, (3) navigator.language, (4) first language prop