You will need Administrator rights on your computer to run the installer. How to Download AutoCAD 2018 Language Packs
Ensure your OS matches the version supported by AutoCAD 2018, typically Windows 7 SP1 , Windows 8.1 , or Windows 10 (64-bit) . autocad 2018 language packs install
You can acquire the official language packs directly from your Autodesk Account . You will need Administrator rights on your computer