Open-source WOVN.io alternatives

Lingo.dev is a set of open-source localization engineering tools that connect to the Lingo.dev platform. It is aimed at product teams that translate their software into multiple languages and want that work to be consistent, measurable and automated, instead of passing strings around by hand.

On the platform, teams configure localization engines with glossaries, brand voice and per-locale chains of language models, and call them from code, the command line, CI/CD pipelines or MCP. Quality criteria that teams define in plain words are used to score translations from LLMs and from native speakers, so low-scoring languages can be found and traced back to a model, a rule or a missing glossary term.

The open-source repository, written in TypeScript and licensed under Apache-2.0, includes a command-line tool and a compiler package, and its topics point to React and React Native projects. A hosted platform with sign-in, pricing and enterprise options sits alongside it.

Tolgee is an open-source, web-based localization platform made to be friendly to both developers and translators. It is presented as an alternative to Crowdin, Phrase and Lokalise, with the aim of saving the time that localization tasks usually take.

Its distinctive feature is in-context translation: holding the Alt or Option key and clicking a text in your running app opens a dialog for editing the string, without digging through JSON or PO files. A one-click screenshot feature captures the page with the phrases highlighted, and translation works in production using the Tolgee Tools Chrome plugin with an API key, so non-developers can contribute.

Instead of only syncing files with a backend, Tolgee integrates into the app through SDKs for frameworks such as React, Angular, Vue and Svelte. Machine translation is available through DeepL, Google Translate, AWS Translate and Azure Translator, which speeds up the work of translators. The platform is written mainly in TypeScript.