diff --git a/astrbot/core/__init__.py b/astrbot/core/__init__.py
index 6400d6fa4..258b04d27 100644
--- a/astrbot/core/__init__.py
+++ b/astrbot/core/__init__.py
@@ -8,7 +8,9 @@
 from astrbot.core.utils.shared_preferences import SharedPreferences
 from astrbot.core.utils.t2i.renderer import HtmlRenderer
 
+
 from .log import LogBroker, LogManager  # noqa
+from .lang import t
 from .utils.astrbot_path import get_astrbot_data_path
 
 # 初始化数据存储文件夹
diff --git a/astrbot/core/agent/handoff.py b/astrbot/core/agent/handoff.py
index 761c50269..0491c367d 100644
--- a/astrbot/core/agent/handoff.py
+++ b/astrbot/core/agent/handoff.py
@@ -15,7 +15,6 @@ def __init__(
         tool_description: str | None = None,
         **kwargs,
     ) -> None:
-
         # Avoid passing duplicate `description` to the FunctionTool dataclass.
         # Some call sites (e.g. SubAgentOrchestrator) pass `description` via kwargs
         # to override what the main agent sees, while we also compute a default
diff --git a/astrbot/core/lang.py b/astrbot/core/lang.py
new file mode 100644
index 000000000..7c4483766
--- /dev/null
+++ b/astrbot/core/lang.py
@@ -0,0 +1,49 @@
+# lang.py
+from pathlib import Path
+from fluent.runtime import FluentLocalization, FluentResourceLoader
+from astrbot.core.utils.astrbot_path import get_astrbot_path
+
+class Lang:
+    def __init__(self, locale = "zh-cn", files = None):
+        self.locale = locale
+        self.files = files
+        self.load_locale(self.locale, self.files)
+
+    def load_locale(self, locale = "zh-cn", files = None):
+        # 1. 定位 locales 文件夹
+        base_dir = Path(get_astrbot_path()) / "locales"
+
+        # 2. 搜索所有可用的语言文件夹 (作为语言包选项)
+        self.available_locales = [d.name for d in base_dir.iterdir() if d.is_dir()]
+
+        # 寻找匹配的 locale (忽略大小写)
+        matched_locale = next(
+            (l for l in self.available_locales if l.lower() == locale.lower()), locale
+        )
+
+        # 3. 默认搜索语言包下所有 .ftl 文件
+        if files is None:
+            files_set = set()
+            for loc in self.available_locales:
+                for ftl_file in (base_dir / loc).glob("*.ftl"):
+                    files_set.add(ftl_file.name)
+            files = list(files_set)
+
+        # 4. 初始化 Loader 和 Localization
+        loader = FluentResourceLoader(str(base_dir / "{locale}"))
+
+        # 优先级: 指定的 locale -> 默认 zh-cn (如果存在)
+        locales_preference = [matched_locale]
+        if "zh-cn" in self.available_locales and matched_locale.lower() != "zh-cn":
+            locales_preference.append("zh-cn")
+
+        self._l10n = FluentLocalization(locales_preference, files, loader)
+
+    def __call__(self, key: str, **kwargs) -> str:
+        """
+        让对象可以直接像函数一样调用：t("key")
+        同时利用 **kwargs 简化参数传递
+        """
+        return self._l10n.format_value(key, kwargs)
+
+t = Lang(locale="zh-cn")
diff --git a/astrbot/dashboard/routes/__init__.py b/astrbot/dashboard/routes/__init__.py
index 481be2f89..fe12feff7 100644
--- a/astrbot/dashboard/routes/__init__.py
+++ b/astrbot/dashboard/routes/__init__.py
@@ -19,6 +19,7 @@
 from .subagent import SubAgentRoute
 from .tools import ToolsRoute
 from .update import UpdateRoute
+from .lang_route import LangRoute
 
 __all__ = [
     "AuthRoute",
@@ -42,4 +43,5 @@
     "ToolsRoute",
     "SkillsRoute",
     "UpdateRoute",
+    "LangRoute"
 ]
diff --git a/astrbot/dashboard/routes/lang_route.py b/astrbot/dashboard/routes/lang_route.py
new file mode 100644
index 000000000..e8568c6df
--- /dev/null
+++ b/astrbot/dashboard/routes/lang_route.py
@@ -0,0 +1,29 @@
+from astrbot.core.lang import t
+from astrbot.dashboard.routes.route import Response, Route, RouteContext
+from quart import request
+
+class LangRoute(Route):
+    def __init__(self, context: RouteContext) -> None:
+        super().__init__(context)
+        self.routes = {
+            "/setLang": ("GET", self.set_Lang),
+        }
+        self.register_routes()
+
+    async def set_Lang(self):
+        data = await request.get_json()
+        lang = data.get("lang")
+        if lang is None:
+            return Response().error("lang 为必填参数。").__dict__
+        try:
+            t.load_locale(
+                locale = lang.lower(),
+                files = None
+            )
+        except ValueError as exc:
+            return Response().error(str(exc)).__dict__
+        payload = {
+            "lang": lang.lower(),
+            "message": f"语言已设置为 {lang}"
+        }
+        return Response().ok(payload).__dict__
diff --git a/astrbot/dashboard/server.py b/astrbot/dashboard/server.py
index 6a588a5d3..5c2a49349 100644
--- a/astrbot/dashboard/server.py
+++ b/astrbot/dashboard/server.py
@@ -28,6 +28,7 @@
 from .routes.session_management import SessionManagementRoute
 from .routes.subagent import SubAgentRoute
 from .routes.t2i import T2iRoute
+from .routes.lang_route import LangRoute
 
 
 class _AddrWithPort(Protocol):
@@ -107,6 +108,7 @@ def __init__(
         self.platform_route = PlatformRoute(self.context, core_lifecycle)
         self.backup_route = BackupRoute(self.context, db, core_lifecycle)
         self.live_chat_route = LiveChatRoute(self.context, db, core_lifecycle)
+        self.lang_route = LangRoute(self.context)
 
         self.app.add_url_rule(
             "/api/plug/<path:subpath>",
diff --git a/dashboard/src/i18n/composables.ts b/dashboard/src/i18n/composables.ts
index 131010bc3..36e419bed 100644
--- a/dashboard/src/i18n/composables.ts
+++ b/dashboard/src/i18n/composables.ts
@@ -1,6 +1,7 @@
 import { ref, computed } from 'vue';
 import { translations as staticTranslations } from './translations';
 import type { Locale } from './types';
+import axios from 'axios';
 
 // 全局状态
 const currentLocale = ref<Locale>('zh-CN');
@@ -96,6 +97,16 @@ export function useI18n() {
       window.dispatchEvent(new CustomEvent('astrbot-locale-changed', {
         detail: { locale: newLocale }
       }));
+
+      axios.post("/api/setLang", { lang: newLocale })
+          .then(response => {
+            if (response.data.code !== 200) {
+              console.error('Failed to set language on server:', response.data.message);
+            }
+          })
+          .catch(error => {
+            console.error('Error setting language on server:', error);
+          });
     }
   };
   
@@ -225,4 +236,14 @@ export async function setupI18n() {
     : 'zh-CN';
   
   await initI18n(initialLocale);
+
+  axios.post("/api/setLang", { lang: initialLocale })
+      .then(response => {
+        if (response.data.code !== 200) {
+          console.error('Failed to set language on server:', response.data.message);
+        }
+      })
+      .catch(error => {
+        console.error('Error setting language on server:', error);
+      });
 } 
\ No newline at end of file
diff --git a/locales/en/main.ftl b/locales/en/main.ftl
new file mode 100644
index 000000000..a39d059ee
--- /dev/null
+++ b/locales/en/main.ftl
@@ -0,0 +1,9 @@
+main-python-version-error = Please use Python 3.10+ to run this project.
+main-use-specified-webui = Using specified WebUI directory: { $webui_dir }
+main-webui-not-found = The specified WebUI directory { $webui_dir } does not exist, using default logic.
+main-webui-latest = WebUI version is up to date.
+main-webui-version-mismatch = Detected WebUI version ({ $v }) does not match current AstrBot version (v{ $version }).
+main-downloading-dashboard = Starting to download dashboard files... Peak hours (evening) may result in slower speeds. If downloads fail repeatedly, please go to https://github.com/AstrBotDevs/AstrBot/releases/latest to download dist.zip and extract the dist folder into the data directory.
+main-download-dashboard-failed = Failed to download dashboard files: { $error }.
+main-download-dashboard-success = Dashboard download complete.
+main-argparse-webui-dir-help = Specify the WebUI static file directory path.
\ No newline at end of file
diff --git a/locales/zh-cn/main.ftl b/locales/zh-cn/main.ftl
new file mode 100644
index 000000000..7767c291b
--- /dev/null
+++ b/locales/zh-cn/main.ftl
@@ -0,0 +1,9 @@
+main-python-version-error = 请使用 Python3.10+ 运行本项目。
+main-use-specified-webui = 使用指定的 WebUI 目录: {webui_dir}
+main-webui-not-found = 指定的 WebUI 目录 {webui_dir} 不存在，将使用默认逻辑。
+main-webui-latest = WebUI 版本已是最新
+main-webui-version-mismatch = 检测到 WebUI 版本 ({v}) 与当前 AstrBot 版本 (v{VERSION}) 不符。
+main-downloading-dashboard =  开始下载管理面板文件...高峰期（晚上）可能导致较慢的速度。如多次下载失败，请前往 https://github.com/AstrBotDevs/AstrBot/releases/latest 下载 dist.zip，并将其中的 dist 文件夹解压至 data 目录下。
+main-download-dashboard-failed = 下载管理面板文件失败: {e}。
+main-download-dashboard-success = 管理面板下载完成。
+main-argparse-webui-dir-help = 指定 WebUI 静态文件目录路径
\ No newline at end of file
diff --git a/main.py b/main.py
index be188140c..d47c495f0 100644
--- a/main.py
+++ b/main.py
@@ -9,7 +9,7 @@
 
 runtime_bootstrap.initialize_runtime_bootstrap()
 
-from astrbot.core import LogBroker, LogManager, db_helper, logger  # noqa: E402
+from astrbot.core import LogBroker, LogManager, db_helper, logger, t  # noqa: E402
 from astrbot.core.config.default import VERSION  # noqa: E402
 from astrbot.core.initial_loader import InitialLoader  # noqa: E402
 from astrbot.core.utils.astrbot_path import (  # noqa: E402
@@ -41,7 +41,7 @@
 
 def check_env() -> None:
     if not (sys.version_info.major == 3 and sys.version_info.minor >= 10):
-        logger.error("请使用 Python3.10+ 运行本项目。")
+        logger.error(t("main-python-version-error"))
         exit()
 
     astrbot_root = get_astrbot_root()
@@ -68,9 +68,9 @@ async def check_dashboard_files(webui_dir: str | None = None):
     # 指定webui目录
     if webui_dir:
         if os.path.exists(webui_dir):
-            logger.info(f"使用指定的 WebUI 目录: {webui_dir}")
+            logger.info(t("main-use-specified-webui", webui_dir))
             return webui_dir
-        logger.warning(f"指定的 WebUI 目录 {webui_dir} 不存在，将使用默认逻辑。")
+        logger.warning(t("main-webui-not-found"), webui_dir)
 
     data_dist_path = os.path.join(get_astrbot_data_path(), "dist")
     if os.path.exists(data_dist_path):
@@ -78,24 +78,22 @@ async def check_dashboard_files(webui_dir: str | None = None):
         if v is not None:
             # 存在文件
             if v == f"v{VERSION}":
-                logger.info("WebUI 版本已是最新。")
+                logger.info(t("main-webui-latest"))
             else:
                 logger.warning(
-                    f"检测到 WebUI 版本 ({v}) 与当前 AstrBot 版本 (v{VERSION}) 不符。",
+                    t("main-webui-version-mismatch", v),
                 )
         return data_dist_path
 
-    logger.info(
-        "开始下载管理面板文件...高峰期（晚上）可能导致较慢的速度。如多次下载失败，请前往 https://github.com/AstrBotDevs/AstrBot/releases/latest 下载 dist.zip，并将其中的 dist 文件夹解压至 data 目录下。",
-    )
+    logger.info(t("main-downloading-dashboard"))
 
     try:
         await download_dashboard(version=f"v{VERSION}", latest=False)
     except Exception as e:
-        logger.critical(f"下载管理面板文件失败: {e}。")
+        logger.critical(t("main-download-dashboard-failed", e))
         return None
 
-    logger.info("管理面板下载完成。")
+    logger.info(t("main-download-dashboard-success"))
     return data_dist_path
 
 
@@ -104,7 +102,7 @@ async def check_dashboard_files(webui_dir: str | None = None):
     parser.add_argument(
         "--webui-dir",
         type=str,
-        help="指定 WebUI 静态文件目录路径",
+        help=t("main-argparse-webui-dir-help"),
         default=None,
     )
     args = parser.parse_args()