Tool Ren'Py RenLocalizer - Multi-Engine Translation Tool for Ren'Py Games

LordGamer00 · Sep 10, 2025

RenLocalizer V2 - Multi-Engine Translation Tool for Ren'Py Games

What is RenLocalizer?

RenLocalizer V2 is a powerful, open-source translation tool specifically designed for Ren'Py visual novel games. It automates the extraction and translation of game dialogues, menus, and UI elements, making game localization faster and easier than ever.

✨ Key Features

Multi-Endpoint Google Translator (v2.1.0)

4 Google mirror endpoints with intelligent rotation (`googleapis.com`, `google.com`, `google.com.tr`, `google.co.uk`)
Parallel endpoint racing - multiple endpoints queried simultaneously, fastest response wins
Automatic failover - failing endpoints are deprioritized, requests route to healthy mirrors
Lingva fallback - when all Google endpoints fail, automatically uses free Lingva Translate
~2-3x faster batch translations compared to single-endpoint approach

Multiple Translation Engines

Google Translate (Free, Web-based with multi-endpoint support)
DeepL (API key required - highest quality translations)
Yandex Translate (Free, Web-based)
LibreTranslator (Self-hosted, open-source option)

Smart Parsing Engine

Context-aware extraction of dialogues, menus, and screen text
Automatic filtering of technical strings (shaders, variables, code blocks)
Placeholder preservation (`{color}`, `[player_name]`, etc.)
Support for multiline and triple-quoted strings
Both `old/new` (official) and `simple` output formats

️ UnRen Integration

Built-in UnRen downloader and launcher
Automatic mode: One-click RPA extraction and RPYC decompilation
Manual mode: Full access to advanced UnRen features
Works with both modern (Ren'Py 7.4+/8.x) and legacy (6.x/7.0-7.3) games

User Experience

Bilingual UI (English & Turkish with auto-detection)
Professional themes (Dark & Eye-friendly)
Tooltips on all settings - hover for detailed explanations
Glossary editor - define preferred translations for recurring terms
Proxy support with auto-rotation for rate limit avoidance

Screenshots

️ System Requirements

OS: Windows 10/11 (64-bit)
RAM: 4GB minimum, 8GB recommended
Disk: ~200MB for application + space for extracted game files
Runtime: Visual C++ Redistributable 2015-2022

Note: The standalone EXE (~150MB) includes all dependencies - no Python installation required!

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Latest Release: v2.1.0

Download RenLocalizer.exe
View Changelog
Source Code on GitHub

Quick Start

Download and run `RenLocalizer.exe`
Select your Ren'Py game folder (containing the `game/` directory)
If the game is packaged (.rpa/.rpyc only), use Tools → Run UnRen to extract
Choose source and target languages
Click Start Translation and wait for completion
Translated files are saved to `game/tl/[language]/`

⚙ Performance Settings (Recommended)

Setting	Low-End PC	Mid-Range	High-End
Concurrent Threads	8-16	16-32	32-64
Batch Size	50-100	100-200	200-500
Request Delay	200-500ms	100-200ms	50-100ms

v2.1.0 Highlights

⚡ Parallel endpoint racing for both single and batch translations
Tooltips on all settings for better usability
New Info Dialog tab explaining multi-endpoint architecture
Configurable concurrency (up to 16 parallel requests)
️ Improved error handling with automatic retry and fallback

Contributing

Contributions are welcome! Feel free to:

Report bugs or request features via Issues
Submit pull requests for improvements
Help with translations for additional UI languages

License

This project is open-source and available under the MIT License.

Credits

UnRen by Dotsworth - for RPA extraction and RPYC decompilation
Lingva Translate - open-source translation API fallback
All contributors and testers who helped improve this tool

FAQ

- Why does the program open slowly?
+ The program checks requirements upon opening, which is why it takes a while to start.

- I started the translation, but there hasn't been any progress for several minutes?
+ Try turning off the Proxy in Settings and translating without a proxy, as proxies can often be blocked, especially if free proxies are used.

Happy Localizing!

LordGamer00 · Sep 11, 2025

I released a new update with minor changes. Although the menus haven't been translated yet, the dialogue options are currently being translated. I tested it on a few games and didn't encounter any errors. I hope you won't either. The program is now generally suitable for use (I think).

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giqui · Sep 14, 2025

LordGamer00 said:
What is RenLocalizer?

RenLocalizer is a desktop application developed to automatically translate Ren’Py visual novels.
It is still in development, but it is usable nonetheless. However, it currently only translates dialogues and dialogue choices.

I started this project as a hobby and decided to share it publicly, so it’s mainly aimed at software enthusiasts.
It was created entirely with the help of artificial intelligence; I’m not a professional programmer, so there may be bugs.
Existing issues might take time to fix, and while fixing them I might accidentally break something else

The project will be released as open source. Anyone can review the code, contribute, or create their own versions.
That’s pretty much it — have fun with it!

✨ Features

High Performance

Translation engines: Google Translate (web), DeepL (API)

Simultaneous processing: Fast translation with 32 active slots

Batch translation: Configurable up to 2000

Proxy rotation: Multiple sources + verification

Smart Translation System

Placeholder protection: Prevents variables from being corrupted

Format support: RenPy standard “old_new” format

Context preservation: Character names and variables are preserved

Case-insensitive: Case-insensitive restoration

Modern Interface

Theme support: Dark, Light, Solarized, and more

Multi-language: Turkish and English interface

Advanced settings: API keys, proxy settings

Real-time progress: Live progress tracking

Technical Specifications

Framework: PyQt6/PySide6 compatibility

Python: 3.8+ support

Platform: Windows

Standalone: Single executable file

Installation

Option 1: Executable (.exe)

Download the RenLocalizer.exe file
Run the RenLocalizer.exe file
Unren the game you want to translate
Select the game folder of the game you want to translate
Start the translation

Quick Start

API Keys: Enter your DeepL API key from Menu > API Keys

Folder Selection: Select your RenPy project folder

Language Settings: Select the source and target languages

Translation: Click the “Start Translation” button

Known Issues

There may be a short delay while loading the proxy list on first run

Very large projects (>10000 strings) may take longer to process

I used free proxies, so there's a high chance you'll encounter issues with the translation when using a proxy. If you experience any problems, turn off the proxy

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I logged into GitHub just to give you a star. I'll run the tests. Thank you very much

It could also have an offline version. It's slow, but it's more private

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LordGamer00 · Sep 15, 2025

giqui said:
I logged into GitHub just to give you a star. I'll run the tests. Thank you very much

It could also have an offline version. It's slow, but it's more private

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Thanks, I didn't actually choose it because it was slow. I focused more on making Google Translate usable in terms of speed and efficiency, so I didn't have the energy to deal with more translation engines like this, but yes, I can add it.

LordGamer00 · Sep 15, 2025

New update released!
This version adds "OPUS-MT Offline Translation" and "Deep Translator". You can try out these new offline translation engines if you wish.
I haven’t done extensive testing yet, but there didn’t seem to be any issues. I tried translating a few games and everything appeared to work fine.
Initially, I aimed to add Argos Translator, but it didn’t work as I wanted—in fact, I couldn’t integrate it at all. So instead, I added different engines.
If you encounter any errors, please report them. Enjoy!
Also, the open-source version of the latest release is now available on GitHub, so you can access the most up-to-date files.

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giqui · Sep 15, 2025

I will write the text soon in this update

. Yesterday I tested the game https://f95zone.to/threads/bobby-sex-saga-v0-2-bean-toast.262142/ and it showed this error, but I believe that an adjustment to the filters will solve it.

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LordGamer00 · Sep 15, 2025

New update released!
**Warning!** When selecting a folder, please select the game folder, not the location where the .exe file is located. The following location should be selected: “Example-Game\game”

I can only guarantee that the Google Translator Web translation engine is currently working; I cannot guarantee the others. Unfortunately, due to my lack of knowledge, I cannot fully integrate other translation engines into the project.

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LordGamer00 · Sep 15, 2025

giqui said:
I will write the text soon in this update . Yesterday I tested the game https://f95zone.to/threads/bobby-sex-saga-v0-2-bean-toast.262142/ and it showed this error, but I believe that an adjustment to the filters will solve it.

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Thank you for your feedback.
I have released a new update. Since the Simple output format unfortunately does not display correctly for every game, I have changed the default format to old/new. I have also updated the language launcher file, making it simpler and more functional.
Please make sure to select the “Example-Game\game” directory. Otherwise, the program will also attempt to translate .rpy files located in the lib and renpy folders, which may cause errors.
I tested translating the same game in your language and did not encounter any issues.
Please download and try the new version.
Once again, thank you for your feedback.

giqui · Sep 15, 2025

LordGamer00 said:
New update released!
**Warning!** When selecting a folder, please select the game folder, not the location where the .exe file is located. The following location should be selected: “Example-Game\game”

I can only guarantee that the Google Translator Web translation engine is currently working; I cannot guarantee the others. Unfortunately, due to my lack of knowledge, I cannot fully integrate other translation engines into the project.

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Thanks

I tested it, and the game worked

. I tried testing it with OPUS. I installed it via CMD, but when it came time to translate, a window popped up asking me to install my language pack. I clicked on download, and it closed.

LordGamer00 · Sep 16, 2025

giqui said:
Thanks

I tested it, and the game worked . I tried testing it with OPUS. I installed it via CMD, but when it came time to translate, a window popped up asking me to install my language pack. I clicked on download, and it closed.

Yes, I am aware of that issue. I checked it yesterday, but I didn't fully understand the source of the problem. I will check it again.

LordGamer00 · Sep 16, 2025

New update released!
Deep-Translator and OPUS-MT have been completely removed because I was unable to properly integrate them into the project.

I don't plan on making any updates related to translation engines for a while. I've been trying to integrate different translation engines for a few days now, but unfortunately, I haven't been able to get any of them to work properly. For this reason, I won't be adding any more translation engines because dealing with them all day for the past few days has been a bit psychologically draining. I don't have a plan for the next update process. Maybe I'll add a mechanic to automatically perform the “Unren” process. Nothing is certain at the moment. I'm sorry to those waiting for a different translation engine; I wish I could add one.

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hebizaihu · Oct 2, 2025

Could you add a feature to edit translation results?
For instance, if a translation is incorrect, users could manually correct it to achieve a perfect translation.

A feature like a local dictionary.

Most Ren'Py translations suffer from a lack of centralized functionality. They rely solely on machine translation without integrating features like publishing, translation editing, local dictionaries, and unified management.

LordGamer00 · Oct 3, 2025

hebizaihu said:
Could you add a feature to edit translation results?
For instance, if a translation is incorrect, users could manually correct it to achieve a perfect translation.

A feature like a local dictionary.

Most Ren'Py translations suffer from a lack of centralized functionality. They rely solely on machine translation without integrating features like publishing, translation editing, local dictionaries, and unified management.

You're right, frankly, when I was creating this program, I wanted it to be a project with as many features as possible, but my lack of knowledge in software development made such an extensive development impossible. Actually, that was the reason I made the project open source—to allow others to add features that I couldn't add myself and create their own versions. Because even though artificial intelligence is quite advanced today, it requires an expert software developer. , and I only have basic knowledge of software, which unfortunately limited me considerably in developing the project.

LordGamer00 · Thursday at 9:17 AM

Hello, I didn't want to leave the project as it was, so I made some updates. These updates are mainly interface updates, dictionary updates, some updates to the proxy system, and I also tried to make a few other updates and optimizations. You can read the detailed update information in the spoiler titled “changelog”.

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LordGamer00 · Friday at 2:04 PM

I made some updates again; you can read the details in the spoiler.

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giqui · Friday at 3:48 PM

LordGamer00 said:
I made some updates again; you can read the details in the spoiler.

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I tried translating it to Portuguese (PT). I couldn't. I tested it with the .rpa files and with the extracted files.

https://f95zone.to/threads/the-sunken-promise-v0-4-ntrlord.265997/post-18737310#post-18735221

LordGamer00 · Friday at 4:28 PM

giqui said:
Portekizce'ye (PT) çevirmesi denedim. Yapamadım. .rpa dosyalarıyla ve sıkılan dosyalarla testi ettim.

https://f95zone.to/threads/the-sunken-promise-v0-4-ntrlord.265997/post-18737310#post-18735221

Thank you for reporting the error. I tried translating the same game into the same language, and I think I have a few ideas about the cause of the error. I am currently testing them.

LordGamer00 · Friday at 5:05 PM

The source of the problem was the updated filtering system. The reason I updated it was to better filter what should be translated and what should not, but I guess I didn't test it well enough. I am currently reworking this filtering system and will publish it once the new update is ready.

LordGamer00 · Friday at 8:49 PM

I updated the filtering system and didn't encounter any errors when I tested it. Hopefully, there won't be any issues in other games either.

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LordGamer00 · 2025-12-02T14:21:28+0000

New Update Released! I noticed that the .exe file doesn't run directly on some systems because they don't have Python. Since no one reported an error about this, I hadn't noticed it until a friend of mine couldn't get it to work. This version focuses more on this issue. You can read the detailed change log in the spoiler.

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Tool Ren'Py RenLocalizer - Multi-Engine Translation Tool for Ren'Py Games

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