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LibreTranslate Translation (Translation)

1. Overview

LibreTranslate is an open-source machine translation engine.
It can be used for free, and it supports offline translation by running locally.
In VoiceScriptPlayer, LibreTranslate provides subtitle and script translation functionality.

⚠️ Unlike other AI features, LibreTranslate requires users to set up and install Python manually.
Once installed, VoiceScriptPlayer will automatically handle server startup and connection.

2. Installation & Setup

1) Install Python

  • Supported Version: Python 3.11
  • Unsupported Versions: Python 3.12, 3.13 (not compatible)
  • Download: Python 3.11.x

Installation notes: - Be sure to check “Add Python to PATH” during installation.
- After installation, open Command Prompt and verify:

python --version  
pip --version

2) Install LibreTranslate

Once Python is ready, open Command Prompt (or PowerShell) and enter:

pip install libretranslate

After the process is complete, LibreTranslate will be installed in your system environment.

3. Using with VoiceScriptPlayer

  • After installation, VoiceScriptPlayer will automatically detect the LibreTranslate installation path and start the server.
  • No manual commands or path configuration are required.
  • When the server is running, translation features are automatically enabled, and the app will monitor server status.

4. Translation Features in VoiceScriptPlayer (Common Functions)

translate-contextmenu

In any text input field (TextBox) within VoiceScriptPlayer,
you can access the translation function directly through the right-click context menu.

🧭 How to Use

  1. Select text and right-click
  2. Choose “Translate → Translate to Korean (DeepL)” or “Translate to Japanese (Web)”
  3. The selected translation engine (DeepL, Google, Papago, etc.) will display results instantly.

⚡ Shortcut Key

  • Ctrl + T
    → Instantly translates the selected text using the default translation engine.
    (The default engine can be changed in settings)

🌐 Supported Translation Engines

Type Engine Features
Local API LibreTranslate Offline use, privacy-focused, open-source
Local/Cloud DeepL Translate High accuracy, excellent contextual understanding
Web Translation Google Translate Widest language support
Web Translation Naver Papago Strong performance in Korean–Japanese translation

💡 Tip:
This feature works across all translation engines (LibreTranslate, DeepL, Google, Papago),
and can be used throughout the project — in Dialogue Editor, Subtitle Editor, or any TextBox where text input is available.

5. Notes & Limitations

  • You must install Python 3.11 (3.12/3.13 are not supported).
  • The user only needs to install; VoiceScriptPlayer automatically handles startup and connection.
  • Translation quality may be lower than commercial engines like DeepL or Papago.
  • For best results, split long sentences into shorter ones before translating.

6. License & Credits