The offline help files did not install correctly during the language pack setup.
Ensure your operating system (typically Windows 7, 8.1, or 10, 64-bit) meets the AutoCAD 2018 system requirements. autocad 2018 language pack
Once a language pack is installed, Windows creates a distinct desktop shortcut for that specific language (e.g., "AutoCAD 2018 - French"). You can launch the exact version you need without messing with internal settings. 📥 How to Download and Install The offline help files did not install correctly
If a language pack is unavailable or unsuitable: You can launch the exact version you need
simply delete folders. This will cause errors.
If you have the Autodesk Access application (formerly Autodesk Desktop App) installed on your Windows machine, you can check the updates and add-ons tab associated with your AutoCAD 2018 installation. If language extensions are available for your subscription model, they will appear there for direct download and installation. Step-by-Step Installation Guide
If you are using a non-English language pack but need to type standard English commands, precede the command with an underscore. For example, typing _LINE will activate the line tool in any language version of AutoCAD.