✨ Features

• Translate any game in real time: reads the text on screen (OneOCR or Windows OCR, built in) and shows the translation right on top of it
• Many translation services: Google Translate (free, no key), Gemini, Groq, ChatGPT, Mistral, or fully offline with Ollama and LM Studio
• Natural-looking overlay: the original text is erased and the translation is drawn on the original background, in a matching color
• Manga Mode: recognizes speech bubbles, reads Japanese vertical text right to left, and also works with English comics
• Translate game voices: turns spoken dialogue into translated text (Whisper or FunASR, runs on your PC)
• Read translations aloud (Text-to-Speech): ElevenLabs, Google Cloud TTS, Windows TTS, or Supertonic (free, offline)
• Smart translation: uses previous lines and game information for more accurate results
• Clipboard translation: translates any text you copy

🚀 Quick Start (about 3 minutes)

You need: Windows 10 or 11. Run your game in windowed or borderless windowed mode (exclusive fullscreen hides the translation).

1. Download the latest version from Releases, extract it anywhere, and run rst.exe
2. Choose languages: Settings → Language, pick the game's language and your language
3. Choose a translator: Settings → Translation, select Google Translate (free, no API key needed)
4. Choose what to translate: - Click Select Application and pick your game window, or - Press Alt+Q and drag a box around the text area
5. Press Alt+F to show the Overlay, then Alt+G to Start

That's it. The translation appears over the game and updates as the text changes. Press Alt+G again to stop.

💡 On Windows 10, click Select Application before turning on the overlay.

⌨️ Hotkeys

You can change every hotkey in Settings → HotKeys.

📖 Guides

🎮 Translating a game

• Select Application follows the game window, even when you move it. Select Area (Alt+Q) translates a fixed part of the screen. Turn on Multi Selection Area to add up to 5 areas; all of them are translated at once.
• Overlay shows the translation on top of the original text. ChatBox (Alt+C) shows it as a list, which is easier for visual novels or when the text area is small.
• Turn on Settings → Context/Overlay → Auto Set Overlay Background Color to erase the original text and blend the translation into the game.
• Describe the game and its main characters in Settings → Context/Overlay → Info about the game for more accurate translations with AI services. Save your settings per game with Settings → Game Profile.
• If some on-screen text (menus, HUD) keeps getting translated, mark it in Settings → Exclude Regions or Ignore Phrases.

📚 Reading manga and comics

1. Settings → OCR/Screen Selection: choose OneOCR, then turn on Manga Mode
2. Settings → Language: set the source language (Japanese, English, …)
3. Press Alt+Q and select the whole page (or the reader window with Select Application)
4. Alt+F for the overlay, Alt+G to start

Manga Mode finds each speech bubble in the image, so neighbouring bubbles are never mixed up. For Japanese it reads vertical columns right to left and skips furigana. The whole page is translated in one go, while every bubble keeps its own translation.

🎙️ Translating game voices (speech-to-text)

1. Settings → Audio: choose a Provider - Whisper: many languages. Click Download Whisper Model… and pick a model (the dialog marks the recommended one) - FunASR: Japanese, Chinese, Korean, English, Cantonese. Fast and accurate. Click Download FunASR Model
2. Recommended under Speech capture & detection: Capture source = All system audio except this app and Speech detection = Silero VAD
3. Press Alt+K (or the Audio STT button) to start. Translations appear in the ChatBox

🔊 Reading translations aloud (Text-to-Speech)

Choose a service in Settings → TTS:

When translations arrive faster than they can be read, Speed up when behind reads the next lines faster (up to 1.5x) to keep up with the game.

📋 Translating copied text

Turn on Settings → Clipboard → Enable Clipboard Translation. Any text you copy (Ctrl+C) is translated automatically.

⚙️ Recommended setups

Tips for speed: select only the text area instead of the whole screen, and add several API keys so another one is used when one hits its limit.

❓ Troubleshooting

Still stuck? Ask on Discord or report a bug.

💬 Community

Join our Discord for support and updates!

💖 Support the author

If you find RST useful and would like to support development, you can buy the author a coffee — thank you! 👋

🛠️ Open Source Technologies

This project stands on the shoulders of giants. We gratefully acknowledge the following open-source projects:

Core & UI

• WPF (Windows Presentation Foundation) - UI Framework

AI & Translation

• System.Text.Json - High-performance JSON serialization
• Hugging Face - For various AI models and datasets

Audio

• NAudio - Audio and MIDI library for .NET
• System.Speech - .NET Speech Synthesis Library
• Whisper.Net - .NET Speech To Text Library

Others

• Python - Backend scripting
• PyTorch - Machine learning framework

📄 License

BSD-style attribution - see LICENSE.md

Acknowledgments: Includes software developed by Seth A. Robinson - UGTLive

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