If you are using or AutoCAD Civil 3D , you must download the language packs specific to those "vertical" products. A standard AutoCAD 2016 language pack will not localize the specialized toolsets of Civil 3D. 4. Updating the Software
Autodesk stopped offering standalone language pack downloads for AutoCAD 2016 via the public subscription portal in later years. But originally, they were available through:
If you customize a toolbar in English, it won’t automatically appear in the German version. You’d need to load/transfer the CUIx.