New file format support for SharePoint Online Content AI document translation

We are expanding the range of file formats supported by the Content AI document translation feature in SharePoint Online (formerly known as Microsoft Syntex). This update aligns with Azure Document Translation and enables new scenarios for translating technical, web, and structured data content. The following formats are now supported: Markdown files: .mdown, .mdtext, .mdtxt, .mdwn, .mkd, .mkdn Web archive formats: .mht, .mhtml Open formats: .odt (OpenDocument Text), .rmd (R Markdown) Structured data: .tab, .tsv Localization formats: .xlf (XLIFF) This message is associated with Microsoft 365 Roadmap ID 492984 When this will happen: General Availability (Worldwide): We will begin rolling out on mid-July 2025 and expect to complete by mid-July 2025. How this will affect your organization: This update enables users to: Translate developer documentation and technical content written in Markdown Support translation of content exported from open-source tools such as LibreOffice Localize eLearning and software files using .xlf Translate structured data files such as .tsv and .tab without file conversion These capabilities reduce manual effort and expand translation coverage to more file types already in use across many organizations. What you need to do to prepare: No admin action is required. The new format support will be available automatically in environments where Content AI Document Translation is enabled. You may wish to notify relevant teams (e.g., documentation, localization, or compliance teams) that these formats are now supported.