diff --git a/src/lib/lang.hpp b/src/lib/lang.hpp
deleted file mode 100644
index 93e00cb..0000000
--- a/src/lib/lang.hpp
+++ /dev/null
@@ -1,72 +0,0 @@
-/*
- * Copyright (C) 2021 ~ 2022 Deepin Technology Co., Ltd.
- *
- * Author:     weizhixiang <weizhixiang@uniontech.com>
- *
- * Maintainer: weizhixiang <weizhixiang@uniontech.com>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#ifndef LANG_H
-#define LANG_H
-
-#include "dstring.h"
-
-#include <stdlib.h>
-#include <cstring>
-#include <string>
-#include <vector>
-#include <array>
-
-// 返回用户语言,参见man gettext
-inline std::vector<std::string> queryLangs() {
-    std::vector<std::string> ret;
-    const char *lcAll = getenv("LC_ALL");
-    const char *lcMessage = getenv("LC_MESSAGE");
-    const char *language = getenv("LANGUAGE");
-    const char *lang = getenv("LANG");
-
-    auto cutOff = [](std::string str)->std::string {
-        size_t idx = str.find(".");
-        if (idx == std::string::npos)
-            return str;
-
-        return std::string(str).substr(0, idx);
-    };
-
-    if (lcAll && std::string(lcAll) != "C"
-        && language && std::string(language) != "")
-    {
-        std::vector<std::string> splits = DString::splitChars(language, ':');
-        for (const auto &l : splits) {
-            ret.push_back(cutOff(l));
-        }
-        return ret;
-    }
-
-    if (lcAll && std::string(lcAll) != "")
-        ret.push_back(cutOff(lcAll));
-
-    if (lcMessage && std::string(lcMessage) != "")
-        ret.push_back(cutOff(lcMessage));
-
-    if (lang && std::string(lang) != "")
-        ret.push_back(cutOff(lang));
-
-    return ret;
-}
-
-
-#endif // LANG_H