fix(clerk-js): Fix Turnstile console warning when locale is used (#5463)

Author: anagstef

.changeset/smart-chefs-fail.md

@@ -0,0 +1,5 @@
+---
+'@clerk/clerk-js': patch
+---
+
+Fix Turnstile console warning when locale is used

packages/clerk-js/src/ui/elements/CaptchaElement.tsx

@@ -18,7 +18,7 @@ export const CaptchaElement = () => {
   const { locale } = useLocalizations();
   const captchaTheme = parsedCaptcha?.theme;
   const captchaSize = parsedCaptcha?.size;
-  const captchaLanguage = parsedCaptcha?.language || locale;
+  const captchaLanguage = parsedCaptcha?.language || locale?.toLowerCase();
 
   useEffect(() => {
     if (!elementRef.current) return;