Question: I need a tool that can translate documents in various formats, including ePub, with high accuracy and formatting preservation.

Immersivetranslate is a free browser extension that translates web pages, documents and ePub files in dual languages. It works with dozens of languages and translates PDF and ePub documents, preserving formatting. Because you can choose among several translation engines, including DeepL and Google Translate, it's good for researchers, students and businesspeople who often need to translate documents rapidly and accurately.

Another powerful option is O.Translator, which translates documents with AI technology for a variety of file formats, including PDF, DOCX, XLSX, PPTX and EPUB. It uses a context-sensitive translation engine that works with more than 60 languages. It also offers features like cost-effective translation, easy programming-language integration with its API and private encrypted storage. It's good for people who need high accuracy and formatting preservation.

For a more general-purpose translation service, SYSTRAN offers professional translation tools that work with more than 55 languages. It can translate documents in many file formats, and you can also translate web pages with a browser extension or programming-language interface. It's got high security and GDPR compliance, too, so it's good for businesses that want to improve global communications and collaboration.