diff --git a/astro-i18next.config.mjs b/astro-i18next.config.mjs
new file mode 100644
index 0000000..c2ecf60
--- /dev/null
+++ b/astro-i18next.config.mjs
@@ -0,0 +1,5 @@
+/** @type {import('astro-i18next').AstroI18nextConfig} */
+export default {
+    defaultLocale: "en",
+    locales: ["en", "jp"],
+};
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