Assuming you have the correct installer:
How to switch languages: AutoCAD does not have a language toggle switch. The language pack overwrites the interface. To switch back, you must uninstall the language pack via Windows Control Panel > Programs and Features. autocad 2017 language pack work
When you work in the new language:
AutoCAD 2017 allows users to change the user interface (UI) language without reinstalling the entire software. This is achieved through language packs – separate modules that add menu, dialog box, command line, and help file translations. Assuming you have the correct installer:
This document explains the functionality, installation, and limitations of language packs for AutoCAD 2017. How to switch languages: AutoCAD does not have
After installing one or more language packs, you can launch a specific language version in two ways:
Cause: The base version is not English, or you are using a specialized toolset (e.g., AutoCAD Civil 3D 2017) with a vanilla AutoCAD language pack. Solution: Uninstall the language pack, reinstall AutoCAD 2017 English, then add the language pack.