Udemy Subtitle Translator

⏺ Udemy Subtitle Translator

Overview

Udemy Subtitle Translator is a Chrome extension that translates Udemy video subtitles in real-time, making educational content accessible in your
preferred language. Whether you're learning programming, business, or any other subject on Udemy, this extension breaks down language barriers by
providing instant subtitle translation.

Key Features

Multiple Translation Methods

Choose from three translation options to suit your needs:

1. Chrome Built-in Translation
- No API key required
- Completely free
- Uses Chrome's native translation capabilities
- Best for casual learners who don't mind manual translation

2. DeepSeek API
- Cost-effective AI translation
- High-quality, context-aware translations
- Automatic translation of all subtitles
- Requires API key (available at platform.deepseek.com)

3. Google Gemini API (Recommended)
- Premium AI translation quality
- Free tier available (15 requests per minute)
- Automatic translation of all subtitles
- Requires API key (available at Google AI Studio)

Smart Subtitle Translation

- Real-time Translation: Subtitles are translated as they appear during video playback
- Sentence Grouping: The extension intelligently groups fragmented subtitles into complete sentences for better translation quality
- Batch Processing: When using AI translation, all subtitles are translated in advance for seamless viewing

Customizable Display Options

Original Subtitle Display
- Toggle original subtitles on/off
- Show both translated and original text simultaneously
- Perfect for language learners who want to compare translations

Subtitle Position
- Place original subtitles above or below the translation
- Adjust settings directly from the video player
- Changes apply instantly without page reload

Multi-Language Support

User Interface Languages
- Korean (한국어)
- Japanese (日本語)
- Chinese (中文)
- English
- Automatically detects browser language on first install
- Manually switch languages anytime from settings

Translation Languages
Choose your target translation language from:
- Korean
- English
- Japanese
- Chinese (Simplified)
- Spanish
- French

Video Player Integration

- Settings Button: A dedicated settings icon appears in the Udemy video player controls
- Quick Access: Adjust subtitle display preferences without leaving the video
- Seamless Experience: Settings changes apply immediately without interrupting playback

Translation Progress Indicator

When using AI translation (DeepSeek or Gemini):
- Visual progress indicator shows translation status
- Displays completion percentage
- Appears in the corner of the screen
- Automatically disappears when complete

How to Use

Initial Setup

1. Install the extension from Chrome Web Store
2. Click the extension icon in your browser toolbar
3. Select your preferred UI language
4. Choose a translation method:
- Chrome Built-in: No setup required
- DeepSeek API: Enter your API key
- Google Gemini API: Enter your API key
5. Select your target translation language
6. Enable translation toggle

Using on Udemy

1. Navigate to any Udemy course video
2. The extension automatically opens the transcript panel
3. For AI translation methods, subtitles are translated automatically
4. Translated subtitles appear in real-time as you watch
5. Click the settings icon in the video player to customize display options

Adjusting Settings

From Extension Popup:
- Change UI language
- Switch translation methods
- Update API keys
- Select target language
- Enable/disable translation

From Video Player:
- Toggle original subtitle display
- Change original subtitle position (above/below)
- Settings save automatically

Benefits

For Language Learners

- Watch courses in foreign languages with native language subtitles
- Compare original and translated text side-by-side
- Improve comprehension while learning new vocabulary

For Global Learners

- Access Udemy's vast course library regardless of language
- Learn from instructors worldwide
- No language barriers to quality education

For Professionals

- Take courses in languages you're studying
- Understand technical content in your native language
- Efficient learning with accurate translations

Privacy & Security

- API keys are stored securely in Chrome's sync storage
- No data is sent to third parties except chosen translation services
- Translation history is not stored
- Works entirely in your browser

System Requirements

- Google Chrome browser
- Active internet connection
- Udemy account
- For AI translation: Valid API key (DeepSeek or Google Gemini)

Getting API Keys

DeepSeek API

1. Visit platform.deepseek.com
2. Sign up for an account
3. Navigate to API Keys section
4. Generate a new API key
5. Copy and paste into extension settings

Google Gemini API

1. Visit aistudio.google.com/app/apikey
2. Sign in with Google account
3. Create API key
4. Copy and paste into extension settings
5. Free tier includes 15 requests per minute

Tips for Best Experience

1. Choose the Right Translation Method:
- Use Chrome Built-in for occasional viewing
- Use AI translation (DeepSeek or Gemini) for regular learning
2. Keep Original Subtitles Visible:
- Helps verify translation accuracy
- Great for language learning
3. Let AI Translation Complete:
- Wait for the progress indicator to finish
- Ensures all subtitles are translated before starting
4. Save Settings:
- Click the Save button after changing settings
- Current Udemy tab will refresh automatically
5. Use Video Player Settings:
- Quick adjustments without opening extension popup
- Changes apply instantly

Troubleshooting

Subtitles Not Appearing
- Ensure translation is enabled in extension settings
- Check that transcript panel is open on Udemy
- Verify API key is correct (for AI translation)

Translation Not Working
- Confirm API key is valid and has credits
- Check internet connection
- Try refreshing the Udemy page

Settings Not Saving
- Ensure you clicked the Save button
- Check Chrome storage permissions

UI Language Not Changing
- Select language from dropdown
- Settings save automatically

Updates & Support

The extension is regularly updated to:
- Improve translation quality
- Add new features
- Fix bugs
- Support Udemy platform changes