Each Autodesk product is installed with a default language. A language pack is a mechanism used to provide another language for the Revit user interface and the documentation. Each language pack contains only the text strings and documents required to support a user working in the specified language; it does not duplicate the core Revit software.
Language packs are about 100 MB in size, so they can be installed and uninstalled quickly. A single installed product can support several languages, enabling users to switch from one to another when required.
For each user, the Revit software uses a single Revit.ini file, stored in the user profile folder. All language packs use the settings defined in that Revit.ini file.
Revit language packs include the following:
For online help (when connected to the Internet), by default users go to the Revit WikiHelp site for the corresponding language. If you always want to access WikiHelp for a particular language, regardless of the language pack being used, edit the Revit.ini file to define the OnlineHelpLocale setting in the Documentation section.