docs: enhance language support documentation and remove auto-detection claims

- Expand README language section with complete list of 19 supported languages
- Add native language names and language codes for each supported language
- Detail language features: manual selection, complete coverage, AI responses
- List comprehensive translation coverage areas (modals, buttons, messages, etc.)
- Update project structure to show language files with descriptions
- Remove auto-detection claims since feature is not working properly
- Change to accurate "manual selection" and "AI-powered translation"
- Fix demo.html to remove false auto-detection advertising

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

README.rst

@@ -68,10 +68,13 @@ Project Structure
    │   ├── ui-themes.js               # Theme management
    │   ├── ui-translations.js         # UI translation system
    │   ├── uncloseai-embed-modal.js   # Main modal UI
-   │   └── languages/                 # Translation files
-   │       ├── en.js, es.js, zh.js, hi.js, fr.js, ar.js, bn.js,
-   │       ├── ru.js, pt.js, ur.js, id.js, de.js, ja.js, sw.js,
-   │       ├── mr.js, te.js, tr.js, zh-tw.js, ko.js
+   │   └── languages/                 # 19 language translation files
+   │       ├── en.js (English), es.js (Spanish), zh.js (Chinese Simplified)
+   │       ├── zh-tw.js (Chinese Traditional), hi.js (Hindi), fr.js (French)
+   │       ├── ar.js (Arabic), bn.js (Bengali), ru.js (Russian)
+   │       ├── pt.js (Portuguese), ur.js (Urdu), id.js (Indonesian)
+   │       ├── de.js (German), ja.js (Japanese), sw.js (Swahili)
+   │       └── mr.js (Marathi), te.js (Telugu), tr.js (Turkish), ko.js (Korean)
    └── tests/              # Jest test suite
 
 Core Technologies
@@ -97,13 +100,47 @@ The AI assistant automatically extracts and understands the content of the curre
 Multi-Language Interface
 ~~~~~~~~~~~~~~~~~~~~~~~~
 
-The entire UI is available in 19 languages:
+The entire UI is available in **19 languages** with complete translation coverage:
 
-* English, Spanish, Chinese (Simplified & Traditional), Hindi, French
-* Arabic, Bengali, Russian, Portuguese, Urdu, Indonesian
-* German, Japanese, Swahili, Marathi, Telugu, Turkish, Korean
+**Supported Languages:**
 
-Language is auto-detected from the page content and can be manually changed.
+* **English** (en) - Default language
+* **Spanish** (es) - Español
+* **Chinese Simplified** (zh) - 中文（简体）
+* **Chinese Traditional** (zh-tw) - 中文（繁體）
+* **Hindi** (hi) - हिन्दी
+* **French** (fr) - Français
+* **Arabic** (ar) - العربية
+* **Bengali** (bn) - বাংলা
+* **Russian** (ru) - Русский
+* **Portuguese** (pt) - Português
+* **Urdu** (ur) - اردو
+* **Indonesian** (id) - Bahasa Indonesia
+* **German** (de) - Deutsch
+* **Japanese** (ja) - 日本語
+* **Swahili** (sw) - Kiswahili
+* **Marathi** (mr) - मराठी
+* **Telugu** (te) - తెలుగు
+* **Turkish** (tr) - Türkçe
+* **Korean** (ko) - 한국어
+
+**Language Features:**
+
+* **Manual Selection**: Users can manually select their preferred language from 19 options
+* **Complete Coverage**: All UI elements, buttons, modals, and messages are translated
+* **AI Response Language**: The AI responds in the user's selected language
+* **Persistent Settings**: Language preference is saved in browser localStorage
+* **No Page Refresh**: Language switching works instantly without reloading
+
+**Translation Coverage Includes:**
+
+* Modal titles and headers
+* Button labels and tooltips  
+* Input placeholders and form labels
+* System messages and notifications
+* Error messages and alerts
+* Settings and configuration options
+* Help text and descriptions
 
 Text-to-Speech Capabilities
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -245,7 +282,7 @@ The test suite covers:
 * TTS processing
 * Storage operations
 * UI theme detection
-* Language detection
+* Language system functionality
 
 Production Deployment
 ---------------------

demo.html

@@ -304,7 +304,7 @@
                     <div class="uncloseai" data-features="smart-translate" id="demo-translate-smart"></div>
                     <p><strong>✨ Smart Features:</strong></p>
                     <ul>
-                        <li>🤖 AI detects page language automatically</li>
+                        <li>🤖 AI-powered translation with language selection</li>
                         <li>🌐 Triple format: code • English • Native (es • Spanish • Español)</li>
                         <li>📋 Quick dropdown selection</li>
                         <li>🚀 Opens in new tab instantly</li>