diff --git a/paperforge/plugin/i18n.js b/paperforge/plugin/i18n.js
index 1e28527a..197d82d6 100644
--- a/paperforge/plugin/i18n.js
+++ b/paperforge/plugin/i18n.js
@@ -181,15 +181,11 @@ const LANG = {
 };
 
 // Auto-detect language from Obsidian config
-function detectLang() {
+function detectLang(app) {
     try {
-        const locale = window.localStorage.getItem('language') || 'en';
+        const locale = (app && app.vault && app.vault.getConfig && app.vault.getConfig('language')) || 'en';
         return locale.startsWith('zh') ? 'zh' : 'en';
     } catch { return 'en'; }
 }
 
-function getLang() { return _PF_LANG; }
-
-let _PF_LANG = 'zh';
-
-module.exports = { LANG, detectLang, getLang, set lang(v) { _PF_LANG = v; } };
+module.exports = { LANG, detectLang };
diff --git a/paperforge/plugin/main.js b/paperforge/plugin/main.js
index d5faa5de..86847a0a 100644
--- a/paperforge/plugin/main.js
+++ b/paperforge/plugin/main.js
@@ -1,12 +1,27 @@
 const { Plugin, Notice, ItemView, Modal, Setting, PluginSettingTab } = require('obsidian');
 const { exec } = require('node:child_process');
-const { LANG, detectLang } = require('./i18n.js');
 
 const VIEW_TYPE_PAPERFORGE = 'paperforge-status';
 
-let T = LANG.zh;  // default Chinese, updated in onload()
+// ── i18n: language pack (auto-detected from Obsidian config) ──
+const LANG = {
+    en: { desc:'Obsidian + Zotero literature pipeline.',setup_done:'✓ PaperForge environment configured',setup_pending:'Not installed — complete preparation and open the wizard',section_prep:'Prerequisites',section_prep_desc:'Before first use, complete the following:',section_guide:'Usage',section_config:'Configuration',prep_python:'Python 3.9+',prep_python_desc:'Must be callable from command line. Click below to auto-detect.',prep_zotero:'Zotero Desktop',prep_zotero_desc:'Install Zotero (https://www.zotero.org)',prep_bbt:'Better BibTeX',prep_bbt_desc:'Zotero → Tools → Add-ons → Install Better BibTeX',prep_export:'BBT Auto-export',prep_export_desc:'Right-click collection → Export → BetterBibTeX JSON → Keep updated → to:',prep_key:'PaddleOCR Key',prep_key_desc:'Get free key at https://aistudio.baidu.com/paddleocr',guide_open:'Open Dashboard',guide_open_desc:'Ctrl+P → "PaperForge: Open Dashboard", or sidebar book icon',guide_sync:'Sync Literature',guide_sync_desc:'Dashboard → Sync Library — pull from Zotero, generate notes',guide_ocr:'Run OCR',guide_ocr_desc:'Dashboard → Run OCR — extract PDF text & figures',btn_install:'Open Wizard',btn_reconfig:'Reconfigure',btn_install_desc:'Auto-detect environment, then open setup wizard',btn_reconfig_desc:'Re-run wizard to change directories or keys',wizard_step1:'Overview',wizard_step2:'Dirs',wizard_step3:'Agent',wizard_step4:'Install',wizard_step5:'Done',wizard_title:'PaperForge Setup Wizard',wizard_intro:'This wizard will guide you through the complete setup.',wizard_dir_hint:'The resources directory is the root for all literature data. Sub-directories inside it:',wizard_dir_sub_hint:'Two sub-directories within resources:',wizard_sys_hint:'System directories (at vault root):',wizard_agent_hint:'Select your AI Agent platform. Skill files deploy in the correct format.',wizard_keys_hint:'API key and Zotero:',wizard_preview:'System/agent files at vault root. Literature (notes, index) under resources.',dir_vault:'Vault Path',dir_resources:'Resource Dir',dir_notes:'Notes Dir',dir_index:'Index Dir',dir_system:'System Dir',dir_base:'Base Dir',field_paddleocr:'PaddleOCR API Key',field_zotero_data:'Zotero Data Dir',field_zotero_placeholder:'Optional, for auto PDF detection',label_agent:'Agent Platform',check_python_ok:'Ready',check_python_fail:'Not found',check_zotero_ok:'Found',check_zotero_fail:'Not detected',check_bbt_ok:'Installed',check_bbt_fail:'Not detected',install_btn:'Install',install_btn_running:'Installing...',install_btn_retry:'Retry',install_complete:'✓ Installation complete!',install_failed:'✗ Installation failed: ',complete_title:'✓ Setup Complete',complete_summary:'Configuration',complete_next:'Next Steps',complete_step1:'Open Dashboard',complete_step1_desc:'Ctrl+P → "PaperForge: Open Dashboard" or sidebar book icon',complete_step2:'Sync Literature',complete_step2_desc:'Dashboard → Sync Library — pull from Zotero',complete_step3:'Run OCR',complete_step3_desc:'Dashboard → Run OCR — extract full text & figures',complete_step4:'Configure BBT Auto-export',nav_prev:'← Back',nav_next:'Next →',nav_close:'Close',validate_fail:'Validation failed',validate_vault:'Vault path not set',validate_resources:'Resource dir not set',validate_notes:'Notes dir not set',validate_index:'Index dir not set',validate_base:'Base dir not set',validate_key:'API key not set',validate_system:'System dir not set',notice_python_missing:'Python not detected. Install Python 3.9+ and add to PATH.',notice_check_fail:'Missing: ',panel_actions:'Quick Actions',action_running:'Running ',api_key_set:'Configured ✓',api_key_missing:'Not configured ✗',not_set:'Not set', },
+    zh: { desc:'Obsidian + Zotero 文献管理流水线。自动同步文献、生成笔记、OCR 提取全文，一站式文献精读工作流。',setup_done:'✓ PaperForge 环境已配置完成',setup_pending:'尚未安装，完成安装准备后点击安装向导',section_prep:'安装准备',section_prep_desc:'首次使用前，请依次完成以下准备：',section_guide:'操作方式',section_config:'当前配置',prep_python:'Python 3.9+',prep_python_desc:'确保 Python 可命令行调用。点击下方按钮自动检测。',prep_zotero:'Zotero 桌面版',prep_zotero_desc:'安装 Zotero (https://www.zotero.org)',prep_bbt:'Better BibTeX',prep_bbt_desc:'Zotero → 工具 → 插件 → 安装 Better BibTeX',prep_export:'BBT 自动导出',prep_export_desc:'右键文献子分类 → 导出分类 → BetterBibTeX JSON → 勾选保持更新 → 导出到（JSON 文件名即为 Base 名）：',prep_key:'PaddleOCR Key',prep_key_desc:'在 https://aistudio.baidu.com/paddleocr 获取 API Key',guide_open:'打开 Dashboard',guide_open_desc:'Ctrl+P → 输入 PaperForge: Open Dashboard，或点左侧书本图标',guide_sync:'同步文献',guide_sync_desc:'Dashboard 中点 Sync Library，从 Zotero 拉取文献生成笔记',guide_ocr:'运行 OCR',guide_ocr_desc:'Dashboard 中点 Run OCR，提取 PDF 全文与图表',btn_install:'打开安装向导',btn_reconfig:'重新配置',btn_install_desc:'自动检测 Python + 前置环境，通过后打开分步安装向导',btn_reconfig_desc:'重新运行安装向导，修改目录或密钥配置',wizard_step1:'概览',wizard_step2:'目录',wizard_step3:'Agent',wizard_step4:'安装',wizard_step5:'完成',wizard_title:'PaperForge 安装向导',wizard_intro:'本向导将引导您完成 PaperForge 环境的完整配置。安装过程会自动创建所有目录结构，无需手动操作。',wizard_dir_hint:'资源目录是文献数据的统一根目录，以下子目录将创建在其内部：',wizard_dir_sub_hint:'资源目录内的两个子目录：',wizard_sys_hint:'独立于资源目录的系统文件：',wizard_agent_hint:'选择你使用的 AI Agent 平台，安装时将按对应格式部署技能文件：',wizard_keys_hint:'以下为 API 密钥与 Zotero 配置：',wizard_preview:'系统文件和 Agent 配置位于 Vault 根目录下。文献数据（正文、索引）统一存放在资源目录内。安装后仍可在设置中修改。',dir_vault:'Vault 路径',dir_resources:'资源目录',dir_notes:'正文目录',dir_index:'索引目录',dir_system:'系统目录',dir_base:'Base 目录',field_paddleocr:'PaddleOCR API 密钥',field_zotero_data:'Zotero 数据目录',field_zotero_placeholder:'可选，用于自动检测 PDF',label_agent:'Agent 平台',check_python_ok:'已就绪',check_python_fail:'未安装',check_zotero_ok:'已安装',check_zotero_fail:'未检测到',check_bbt_ok:'已安装',check_bbt_fail:'未检测到',install_btn:'开始安装',install_btn_running:'正在安装...',install_btn_retry:'重试',install_complete:'✓ 安装完成！',install_failed:'✗ 安装失败：',complete_title:'✓ PaperForge 安装完成',complete_summary:'当前完整配置',complete_next:'下一步操作',complete_step1:'打开 PaperForge Dashboard',complete_step1_desc:'Ctrl+P → 输入 PaperForge: Open Dashboard，或点左侧书本图标',complete_step2:'同步文献',complete_step2_desc:'Dashboard 中点 Sync Library，从 Zotero 拉取文献生成笔记',complete_step3:'运行 OCR',complete_step3_desc:'Dashboard 中点 Run OCR，提取 PDF 全文与图表',complete_step4:'配置 BBT 自动导出',nav_prev:'← 上一步',nav_next:'下一步 →',nav_close:'关闭',validate_fail:'配置验证失败',validate_vault:'Vault 路径未填写',validate_resources:'资源目录未填写',validate_notes:'正文目录未填写',validate_index:'索引目录未填写',validate_base:'Base 目录未填写',validate_key:'PaddleOCR API 密钥未填写',validate_system:'系统目录未填写',notice_python_missing:'Python 未检测到，请先安装 Python 3.9+ 并加入 PATH',notice_check_fail:'未通过: ',panel_actions:'快捷操作',action_running:'正在执行 ',api_key_set:'已配置 ✓',api_key_missing:'未配置 ✗',not_set:'未设置', }
+};
 
-function t(key) { return T[key] || LANG.en[key] || key; }
+let T = LANG.zh;
+
+function langFromApp(app) {
+    try {
+        if (app && app.vault && typeof app.vault.getConfig === 'function') {
+            const l = app.vault.getConfig('language');
+            if (l && l.startsWith('zh')) return 'zh';
+        }
+    } catch {}
+    return 'en';
+}
+
+function t(key) { return (T && T[key]) || (LANG.en[key]) || key; }
 
 const DEFAULT_SETTINGS = {
     vault_path: '',
@@ -791,7 +806,7 @@ class PaperForgeSetupModal extends Modal {
 module.exports = class PaperForgePlugin extends Plugin {
     async onload() {
         await this.loadSettings();
-        T = (detectLang() === 'zh') ? LANG.zh : LANG.en;
+        T = (langFromApp(this.app) === 'zh') ? LANG.zh : LANG.en;
         this.registerView(VIEW_TYPE_PAPERFORGE, (leaf) => new PaperForgeStatusView(leaf));
 
         this.addRibbonIcon('book-open', 'PaperForge Dashboard', () => PaperForgeStatusView.open(this));