From 2351656313a68de48d16b9f4643251cc5b372497 Mon Sep 17 00:00:00 2001
From: Christian Samaniego
 <199278128+christiansamaniego-okta@users.noreply.github.com>
Date: Wed, 5 Nov 2025 15:24:11 -0500
Subject: [PATCH] add href lang tags

---
 src/app/sitemap.ts | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/src/app/sitemap.ts b/src/app/sitemap.ts
index fcce47f3..2783b8c7 100644
--- a/src/app/sitemap.ts
+++ b/src/app/sitemap.ts
@@ -6,14 +6,35 @@ export default function sitemap(): MetadataRoute.Sitemap {
     {
       url: BASE_URL,
       lastModified: new Date(),
+      alternates: {
+        languages: {
+          en: `${BASE_URL}/`,
+          ja: `${BASE_URL}/ja/`,
+          "x-default": `${BASE_URL}/`,
+        },
+      },
     },
     {
       url: `${BASE_URL}/introduction`,
       lastModified: new Date(),
+      alternates: {
+        languages: {
+          en: `${BASE_URL}/introduction`,
+          ja: `${BASE_URL}/ja/introduction`,
+          "x-default": `${BASE_URL}/introduction`,
+        },
+      },
     },
     {
       url: `${BASE_URL}/libraries`,
       lastModified: new Date(),
+      alternates: {
+        languages: {
+          en: `${BASE_URL}/libraries`,
+          ja: `${BASE_URL}/ja/libraries`,
+          "x-default": `${BASE_URL}/libraries`,
+        },
+      },
     },
   ];
 }