Translation
SaaS, open source and skills for translation work — with the limits of each written down.Before you pick
What decides it
Terminology decides this, not whether a glossary exists. A term applied as a constraint holds; a term named in a prompt drifts at volume.
What to avoid
The cleaner a draft reads, the less anyone checks it against the source. Errors that change meaning survive — a dropped negation reads perfectly.
What is changing
Reviewing everything is giving way to per-segment confidence scoring: high-scoring text ships unread, flagged segments reach a human. Scores are vendor-defined and don't compare.
SaaS
Hosted products you sign up for.Leading
Established picks, at the top of today's aggregate.
- 1DeepLMost natural output for European languages and professional documents, with glossaries and format fidelity.
- 2Google TranslateBroadest language coverage (240+ languages) and a free tier; best when you need reach over polish.
- 3ChatGPTTone-sensitive and creative translation where context and idiom matter more than raw language coverage.
- 4ClaudeStrong on idioms, context, and Asian languages; a top pick for nuance-heavy passages.
- 5Microsoft TranslatorBusiness communication and Office-integrated workflows with reliable API scale.
Emerging
Newer challengers, surfaced by two or more sources.
- 1Localify.ai
- 2ImageFromTranslatorWeb tool that translates text inside uploaded images into English only, redrawing it in the original layout; runs on daily free credits.
- 3MixTranslateRuns one text through 20-plus language models at once and shows the translations side by side, then picks one for your tone.
- 4OvesioTranslates e-commerce catalogues into 30-plus languages and rewrites product descriptions and SEO tags, plugging into Shopify, WooCommerce and PrestaShop.
- 5AutoLocaliseSDK for React, Next.js, Expo and Python backends that translates strings at runtime, replacing hand-maintained i18n JSON catalogues.
Open source
Repositories you run yourself.Leading
- 1openai-translator (yetone)Wildly popular LLM-based translation and polishing tool (browser extension, desktop app, userscript); a recognized OSS translation leader (~25k stars).
- 2Immersive TranslateBilingual side-by-side web-page, PDF, and ebook translation, loved for reading foreign content in context (~18k stars).
- 3LibreTranslateThe de-facto free, self-hosted machine-translation API — offline-capable, with no proprietary dependencies (~16k stars).
- 4translate-shellCommand-line translator wrapping Google/Bing/DeepL and more; a Unix-workflow staple for quick terminal translation (~7.5k stars).
- 5OpenNMT-pyResearch-grade neural machine-translation toolkit for training and serving your own translation models (~7k stars).
Emerging
- 1Huanshere/VideoLingoSelf-hosted pipeline that cuts, translates and time-aligns video subtitles with WhisperX, then optionally dubs them with cloned voices.
- 2zyddnys/manga-image-translatorSelf-hosted pipeline that detects and OCRs text in manga pages, erases it by inpainting, and redraws the translation in place.
- 3yihong0618/bilingual_book_makerCommand-line script that turns EPUB, TXT, PDF, Markdown and SRT files into side-by-side bilingual editions using OpenAI, Claude, Gemini or DeepL.
- 4x6nux/zed-globalizationPrebuilt Chinese, Japanese and Korean editions of the Zed editor, rebuilt from upstream by an automated AI string-translation pipeline.
- 520000419/fauxnix
Skills
Skills you drop into a coding agent.Leading
- 1translate skill (feiskyer/claude-code-settings)Well-maintained translate SKILL.md inside a popular curated Claude Code settings/skills collection (~1.6k stars overall).
- 2translate-book (deusyu)Agent skill (Codex/Claude Code) that translates whole books — PDF/DOCX/EPUB — into any language using parallel subagents (~1k stars).
- 3translate skill (djyde/ccmate)Localization-focused translate skill (updates existing locales, protects reserved terms); rated Grade A in the skills directory (~630 stars).
Emerging
- 1i18next/i18next-cli
- 2HoraceLuBFA/en-zh-translation-polishRuns English text through a seven-stage English-to-Chinese pipeline aimed at removing translationese, and returns source and translation side by side.
- 3hypersocialinc/hypershotsBuilds App Store screenshots as HTML panels and translates the whole set into other languages in one pass, auto-fitting headlines.
- 4lingui/skills
- 5globalize-now/globalize-skillsSix agent skills that walk Claude Code or Cursor through adding i18n to a codebase and wiring it to the Globalize.now service.