Weblate

Weblate is a copylefted libre software web-based continuous localization system, used by over 2500 libre projects and companies in more than 165 countries. Copylefted libre software, used by over 2,500 libre software projects and companies in over 165 countries. Hosted service and standalone tool with tight version control integration. Simple and clean user interface, propagation of translations across components, quality checks and automatic linking to source files. There is infrastructure in place so that your translation closely follows development. This way translators can work on translations the entire time, instead of working through huge amounts of new text just prior to release. Copylefted; use, see, modify and share at will, and with everyone. All translators are properly credited in the version control system. Customizable quality checks helps improve translation quality.