Add language dropdown localization

middleware.ts

@@ -1,9 +1,24 @@
 import createMiddleware from "next-intl/middleware";
+import {NextResponse, type NextRequest} from "next/server";
 import {routing} from "./src/i18n/routing";
 
-export default createMiddleware(routing);
+const handleI18nRouting = createMiddleware(routing);
+
+export default function middleware(request: NextRequest) {
+  const legacyEnglishMarkets = ["/en-ie", "/en-gb", "/en-us"];
+  const pathname = request.nextUrl.pathname;
+
+  for (const legacyPath of legacyEnglishMarkets) {
+    if (pathname === legacyPath || pathname.startsWith(`${legacyPath}/`)) {
+      const url = request.nextUrl.clone();
+      url.pathname = pathname.replace(legacyPath, "/en");
+      return NextResponse.redirect(url);
+    }
+  }
+
+  return handleI18nRouting(request);
+}
 
 export const config = {
   matcher: ["/((?!api|_next|_vercel|.*\\..*).*)"],
 };
-