It is generally not possible to change the user interface language using a standalone pack. Instead, you must download the specific Civil 3D installer for your preferred language. How to Get Civil 3D in Your Language
You switch from English to Spanish. Your ribbon now says "Superficie" instead of "Surface." However, your company template ( .dwt ) has an English label style called "Major Contour - Annotated." Result: That label will still read "Major Contour - Annotated" on your drawing. The language pack does not retro-translate style names. civil 3d language pack
Using the correct language version can significantly improve workflow efficiency: To change the language in Civil 3D - Autodesk It is generally not possible to change the