diff --git a/src/i18n/index.ts b/src/i18n/index.ts
index 8da071b..a3e8a7e 100644
--- a/src/i18n/index.ts
+++ b/src/i18n/index.ts
@@ -9,8 +9,21 @@ const messages = {
   "ja-JP": jaJP,
 };
 
+const supportedLocales = Object.keys(messages);
+
+const getInitialLocale = () => {
+  if (typeof window !== "undefined") {
+    const params = new URLSearchParams(window.location.search);
+    const lang = params.get("lang");
+    if (lang && supportedLocales.includes(lang)) {
+      return lang;
+    }
+  }
+  return "zh-CN";
+};
+
 const i18n = createI18n({
-  locale: 'zh-CN',
+  locale: getInitialLocale(),
   fallbackLocale: "zh-CN",
   messages,
   legacy: false,
diff --git a/src/pages/file/index.vue b/src/pages/file/index.vue
index 4f64943..4be8a4a 100644
--- a/src/pages/file/index.vue
+++ b/src/pages/file/index.vue
@@ -196,6 +196,9 @@ const { locale, t } = useI18n();
 
 const handleLangMenuClick = ({ key }: { key: string }) => {
   locale.value = key;
+  const url = new URL(window.location.href);
+  url.searchParams.set("lang", key);
+  window.history.replaceState({}, "", url.href);
 };
 
 const isPhone = ref(false);
@@ -247,7 +250,12 @@ const requestCamera = () => {
 const shareUrl = async () => {
   if (myId.value) {
     const url =
-      window.location.origin + window.location.pathname + "?sign=" + myId.value;
+      window.location.origin +
+      window.location.pathname +
+      "?sign=" +
+      myId.value +
+      "&lang=" +
+      locale.value;
     await copyToClipboard(url);
     notification.success({
       message: t("index.linkCopied"),