Unlike base AutoCAD, which allows you to swap interface languages using downloadable packs, Civil 3D does not support standalone language packs. Because it uses highly specialized, localized engineering terminology (such as "Chainage" vs. "Stations"), the entire software must be installed in your desired language from the start. Core Reality of Civil 3D Language Support
.exe with a language switch argument, such as /language es-ES.Autodesk Knowledge Network: Autodesk often hosts direct download links for language packs on their official support pages. 2. Installation Steps civil 3d language pack