Open Source Windows Machine Translation Software
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Machine Translation Software for Windows
View 32 business solutionsBrowse free open source Machine Translation software and projects for Windows below. Use the toggles on the left to filter open source Machine Translation software by OS, license, language, programming language, and project status.
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XUnity Auto Translator
Advanced translator plugin that can be used to translate Unity games
XUnity.AutoTranslator is an advanced plugin framework designed to automatically translate text in Unity-based games in real time by intercepting and replacing in-game text during rendering. It works by injecting itself into the game process and leveraging external translation services such as Google Translate, DeepL, or custom APIs to dynamically convert text into a target language. The tool supports both automatic translation and manual translation workflows, allowing users to refine or override translations through editable files. It integrates with popular Unity modding frameworks such as BepInEx, MelonLoader, and others, making it widely compatible with a large number of Unity titles. The plugin also includes mechanisms for caching translations locally to improve performance and reduce repeated API calls. It supports advanced features such as font replacement, text formatting adjustments, and even texture-based translation for embedded text. -
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Argos Translate
Open-source offline translation library written in Python
Argos Translate uses OpenNMT for translations and can be used as either a Python library, command-line, or GUI application. Argos Translate supports installing language model packages which are zip archives with a ".argosmodel" extension containing the data needed for translation. LibreTranslate is an API and web-app built on top of Argos Translate. Argos Translate also manages automatically pivoting through intermediate languages to translate between languages that don't have a direct translation between them installed. For example, if you have a es → en and en → fr translation installed you are able to translate from es → fr as if you had that translation installed. This allows for translating between a wide variety of languages at the cost of some loss of translation quality. -
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OPolyglot
Your Private Offline Translator
OPolyglot is a fast and fully offline translator that respects your privacy. At the current stage of development, OPolyglot offers three key features: Simple Translator: A convenient tool for classic translation of typed or copied text. Document Translator: The app helps translate PDF documents. Screen Translator: A smart feature that allows you to take a screenshot of any screen area, automatically recognize the text (OCR), and instantly translate it. AppImage: https://sourceforge.net/projects/opolyglot/files/v0.3.1/OPolyglot-x86_64.AppImage/download snap: https://snapcraft.io/opolyglot flatpak: https://sourceforge.net/projects/opolyglot/files/v0.3.1/opolyglot-x86_64.flatpak/download windows: https://sourceforge.net/projects/opolyglot/files/v0.3.1/opsetup.exe/download source code: https://github.com/fenenko/OPolyglot -
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PDFMathTranslate
PDF scientific paper translation with preserved formats
PDFMathTranslate is a Python-based tool that uses AI translation to convert academic PDFs into bilingual (e.g. Chinese-English) documents while preserving formatting, including math notation. It supports OCR-enhanced content and offers CLI, GUI, Docker, and Zotero integration under AGPL v3. -
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Zotero PDF Translate
Translate PDF, EPub, webpage, metadata, annotations, notes
Zotero PDF Translate is a plugin for Zotero that enhances the research workflow by enabling in-app translation of PDFs, EPUBs, webpages, and associated metadata directly within the Zotero interface. It integrates seamlessly with Zotero’s document reader, allowing users to select text and instantly receive translations in a pop-up or side panel without leaving the application. The plugin supports a wide range of translation services, including both free and API-based providers, giving users flexibility in accuracy and performance. It also extends translation functionality to annotations, notes, titles, and abstracts, enabling comprehensive multilingual research management. Advanced features such as sentence-by-sentence translation, dictionary lookup, and multi-service comparison further enhance usability for academic work. The tool is highly customizable, allowing users to adjust interface behavior, translation settings, and shortcuts to match their workflow. -
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Crow Translate
Lightweight translator that allows you to translate and speak text
Crow Translate is a simple and lightweight translator written in C++ / Qt that allows you to translate and speak text using Google, Yandex, Bing, LibreTranslate and Lingva translate API. You may also be interested in my library QOnlineTranslator used in this project. Wayland does not support global shortcuts registration, but you can use D-Bus to bind actions in the system settings. For desktop environments that support additional applications actions (KDE, for example) you will see them predefined in the system shortcut settings. You can also use them for X11 sessions, but you need to disable global shortcuts registration in the application settings to avoid conflicts. On Linux to make the application look native on a non-KDE desktop environment, you need to configure Qt applications styling. -
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pyVideoTrans
Translate the video from one language to another and embed dubbing
pyVideoTrans is an ambitious open-source multimedia processing project that assembles speech recognition, subtitle generation, AI translation, voice synthesis, and video assembly into a unified pipeline for converting videos from one language to another with embedded dubbing and captions. At its core it runs speech-to-text models to transcribe audio tracks, translates the resulting text into a target language using local or cloud-based translation engines, synthesizes new speech to match the translated subtitles, and then merges that speech back into the video, creating a fully localized media file. The tool supports both command-line and GUI modes, making it accessible to developers and creatives needing batch or automated processing. -
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STranslate
A ready-to-go translation ocr tool developed with WPF/WPF
STranslate is a lightweight, open-source machine translation front end that lets users translate text between languages using a variety of supported back-end translation engines or APIs, offering a simple GUI for quick translation tasks without needing to write code or use complex web UIs. The application is designed to be small, cross-platform, and flexible, giving users the ability to type or paste text and receive instant translations while optionally selecting the desired language pairs or switching between multiple service providers. By abstracting backend complexity, STranslate makes it easy for both casual users and developers to get translations in local apps, offline modes (where supported), or even integrate translation workflows into larger projects via plugins or scripting hooks. It often includes features like clipboard monitoring, keyboard shortcuts, history tracking, and configurable translation preferences that enhance daily productivity. -
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UnsupervisedMT
Phrase-Based & Neural Unsupervised Machine Translation
Unsupervised Machine Translation is a research repository that implements both phrase-based SMT and neural MT approaches for translation without parallel corpora. The neural component supports multiple architectures—seq2seq, biLSTM with attention, and Transformer—and allows extensive parameter sharing across languages to improve data efficiency. Training relies on denoising auto-encoding and back-translation, with on-the-fly, multithreaded generation of synthetic parallel data to continually refresh supervision signals. The project also provides scripts to fetch and preprocess monolingual data, learn BPE codes, and train cross-lingual embeddings that bootstrap unsupervised alignment between languages. Beyond the core EMNLP 2018 setup, the codebase exposes additional, optional capabilities such as multi-language training, language model pretraining with shared parameters, and adversarial training. -
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bilingual_book_maker
Make bilingual epub books Using AI translate
bilingual_book_maker is an AI-assisted translation tool for creating bilingual and multilingual versions of books and text files. It is designed to process formats such as EPUB, TXT, SRT, and PDF, then generate translated output that helps readers compare the original text with the target language. The project supports multiple AI providers and models, including OpenAI-compatible models and other translation backends through LiteLLM-style integrations. It is especially useful for public domain books, language learning, subtitle translation, and personal reading workflows. Users can run it from Python scripts or install it as a command-line package for repeated translation tasks. The repository also includes documentation, test books, prompt templates, and configuration options for customizing how translations are generated. -
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biyi
Biyi (比译) is a convenient translation and dictionary app
Biyi is a convenient translation and dictionary app written in Flutter. -
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MisakaTranslator
Galgame's Multilingual Real-time Machine Translation Tool
MisakaProject is a collection of all projects developed based on MisakaTranslator or its auxiliary functions. If you are interested in adding your own projects of related types to MisakaProject, please contact the author. MisakaPatcher added support for plug-in Chinese patch, so this tool is more suitable for players who like manual translation, and also provides another way for Chinese personnel who have difficulty unpacking packets to release Chinese patch. MisakaHookFinder is suitable for some games where the translator can not be used to directly get the text hook method. Users can search for the hook special code by themselves or directly use it to get the source text. At the same time, it also supports the clipboard to output the original text. -
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OpenAI Translator
Browser extension and cross-platform desktop app based on ChatGPT API
Browser extension and cross-platform desktop application for translation based on ChatGPT API. I have developed a Bob plugin that utilizes ChatGPT API to provide global word translation on macOS. However, since not all users have access to macOS to benefit from the plugin, I have created this project! What began as a Chrome extension has now evolved into a multi-platform desktop app that I am currently developing. The desktop application does not support the pop-up icon after word selection. You must press the shortcut key to trigger the translation after selecting a word. It offers three modes: translation, polishing and summarization. Our tool allows for mutual translation, polishing and summarization across 55 different languages. Streaming mode is supported! It allows users to customize their translation text. One-click copying, Text-to-Speech (TTS). Available on all platforms (Windows, macOS, and Linux) for both browsers and Desktop. -
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google-translate-api
A free and unlimited API for Google Translate
A free and unlimited API for Google Translate. The language in which the text should be translated. Must be one of the codes/names (not case sensitive) contained in languages.js. Auto language detection, spelling correction, language correction. Fast and reliable – it uses the same servers that translate.google.com uses. -
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Edge Translate
A translation extension
Edge Translate is a simple and practical translation plugin that supports mainstream browsers such as Chrome, Firefox, and 360 Secure Browser. The main purpose of our plugin is to assist users in reading foreign literature. To this end, we have followed the principle of the user's reading experience first, and made the following efforts. We use the API provided by Google Translate to translate words and sentences, which guarantees the accuracy of translation results to a certain extent. We support the translation of wording in PDF files, which breaks the dyslexia of many users when reading PDF documents (due to the Firefox browser's bug, this feature is temporarily unavailable on Firefox browser). We chose the friendly side pop-up to show the translation results. The pop-up display bar will push the user reading content to avoid blocking the content from affecting the reading. Please refresh the page that needs to be translated after installation or update! -
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Live Transcribe Speech Engine
Live Transcribe is an Android application
Live Transcribe Speech Engine provides on-device speech recognition components that power real-time transcription for accessibility and everyday voice-first experiences. Its design prioritizes latency and robustness in noisy, far-field environments, enabling continuous transcription with low delay on mobile hardware. The engine manages audio front-end processing—such as noise suppression and voice activity detection—before feeding audio into compact, accurate acoustic and language models. Partial hypotheses stream as words are recognized, then stabilize with minimal jitter as confidence increases, which is crucial for usability. The code emphasizes efficient use of CPU and neural accelerators to balance battery life with responsiveness. Deployed in accessibility contexts, it aims for dependable behavior across accents, environments, and intermittent connectivity, with graceful degradation when resources are constrained. -
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Varamozhi is a free English-Malayalam transliteration library. It can transliterate Malayalam text between Malayalam and English scripts. Varamozhi takes as the input, the mapping between a Malayalam font and a transliteration scheme; outputs functions i
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Google Translate PHP
Free Google Translate API PHP Package
A simple and effective PHP library for translating text using Google Translate without needing an API key. It allows developers to integrate real-time translation features into their applications with minimal setup and supports multiple languages, leveraging Google Translate’s unofficial endpoint. -
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Translate Shell
Command-line translator using Google Translate, Bing Translator, etc.
Translate Shell (formerly Google Translate CLI) is a command-line translator powered by Google Translate (default), Bing Translator, Yandex.Translate, and Apertium. It gives you easy access to one of these translation engines in your terminal. By default, translations with detailed explanations are shown. You can also translate the text briefly (only the most relevant translation will be shown). Translate Shell can also be used like an interactive shell; input the text to be translated line by line. Translate Shell is known to work on many POSIX-compliant systems. You may use Translate Shell from any Unix shell of your choice (bash, zsh, ksh, tcsh, fish, etc.); however, the wrapper script requires either bash or zsh installed. It is a must to have corresponding fonts for the language(s) / script(s) you wish to display in your terminal. -
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go-i18n
Translate your Go program into multiple languages
go-i18n is a Go package and a command that helps you translate Go programs into multiple languages. Supports pluralized strings for all 200+ languages in the Unicode Common Locale Data Repository (CLDR). Code and tests are automatically generated from CLDR data. Supports strings with named variables using text/template syntax. Supports message files of any format (e.g. JSON, TOML, YAML). Use goi18n extract to extract all i18n.Message struct literals in Go source files to a message file for translation. Create an empty message file for the language that you want to add (e.g. translate.es.toml). Run goi18n merge active.en.toml translate.es.toml to populate translate.es.toml with the messages to be translated. The goi18n command manages message files used by the i18n package. -
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YAppaRi Seyali
YAppaRi Seyali is a Tamil Prosidy Analyzer
யாப்பறி செயலி This is a java interfaced UI for the Tamil Prosidy Analyzer It is in Beta version and expected to have some bugs. -
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LingoGeek
Free offline document translator for Windows - Word, PDF, subtitles
LingoGeek translates whole documents on your own machine. Word, PDF, SRT and VTT subtitles, Markdown and plain text, with no character limit. Most translation tools want pasted text, or cap you at one document a month. LingoGeek takes the file itself and has no cap at all, because nothing is uploaded. Headings, lists, tables, headers and footers keep their place in a Word document. Subtitle timings and cue numbers are copied through exactly, so only the spoken lines change. Your original is never touched. The translation is written as a new file beside it. Drop in a folder full and they go through one after another, block by block. Language packs are downloaded once and then it works offline. No account, no adverts, no telemetry. Open source under GPL-3.0. Windows 10 or 11, 64 bit. -
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Saladict
Pop-up dictionary and page translator with multiple search modes
All-in-one professional pop-up dictionary and page translator which supports multiple search modes, page translations, new word notebook and PDF selection searching. Saladict supports mixed use of multiple search modes. Whether it be single-click, double-click, pop-up icon, hovering or keyboard shortcuts, you name it. The combination of dictionaries is dynamically adjusted according to search text and Saladict profile. Although Saladict is built for looking up English words, it also supports many other languages. Chinese (simplified and traditional), Japanese, Korean are supported with dictionaries. Other languages are supported with several machine translation services. Each dictionary is well polished to a unify style for comfortable reading experience. Built-in Google, Lingocloud and Youdao Page Translation. -
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Violin
Open-source Video Translation Skill
Violin is an open-source video translation and dubbing tool that turns existing videos into localized versions with translated voice-over and optional subtitles. It transcribes the original speech, translates the text, generates natural-sounding speech in the target language, and remuxes the new audio back into the video. The project is designed to keep the generated speech aligned with the original timing so the final result feels closer to a real dubbed video. It can be used from the command line, through a FastAPI web app, or as a Claude Code skill. Violin supports multilingual workflows and is useful for creators, educators, localization teams, and developers building automated video translation pipelines. It is especially practical for turning lectures, tutorials, interviews, demos, and social videos into accessible content for wider audiences. -
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Apertium: Machine Translation Toolbox
The free and open-source rule-based machine translation platform
Apertium is a toolbox to build open-source shallow-transfer machine translation systems, especially suitable for related language pairs: it includes the engine, maintenance tools, and open linguistic data for several language pairs.
