From 2803c59f9dba208162cc69d438bccea9ff4bd7ec Mon Sep 17 00:00:00 2001
From: "tangly1024.com" <tlyong1992@hotmail.com>
Date: Tue, 30 Apr 2024 18:21:04 +0800
Subject: [PATCH] =?UTF-8?q?=E5=88=9D=E5=A7=8B=E5=8C=96=E7=94=A8=E6=88=B7?=
 =?UTF-8?q?=E8=AF=AD=E8=A8=80=E7=9A=84bug?=
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---
 lib/lang.js | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/lib/lang.js b/lib/lang.js
index ff2201b8..a6ef7b57 100644
--- a/lib/lang.js
+++ b/lib/lang.js
@@ -69,13 +69,22 @@ export function generateLocaleDict(langString) {
  */
 export function initLocale(lang, locale, changeLang, changeLocale) {
   if (isBrowser) {
-    // 用户请求的预研
-    const queryLang =
+    // 用户请求的语言
+    let queryLang =
       getQueryVariable('locale') ||
       getQueryVariable('lang') ||
       loadLangFromLocalStorage()
+
+    if (queryLang) {
+      // 用正则表达式匹配有效的语言标识符例如zh-CN（可选的 -CN 部分）
+      queryLang = queryLang.match(/[a-zA-Z]{2}(?:-[a-zA-Z]{2})?/)
+      if (queryLang) {
+        queryLang = queryLang[0]
+      }
+    }
+
     let currentLang = lang
-    if (queryLang && queryLang !== 'undefined' && queryLang !== lang) {
+    if (queryLang && queryLang !== lang) {
       currentLang = queryLang
     }