An AutoCAD 2016 language pack is a free add-on that applies a localized user interface to your existing core software. Instead of buying or downloading a completely different version of AutoCAD, you download a lightweight package. This package updates the ribbon menus, toolbars, dialog boxes, and help documentation into your chosen language. Core Architecture
A Language Pack is a software add-on that applies a localized user interface (UI), documentation, and help files to a core installation of AutoCAD. Core Product vs. Language Pack autocad 2016 language packs