In the Revit.ini file, settings in the [Documentation] section control the language for online help and the browser Revit uses to access help files.
Specifies the preferred web browser for viewing online help.
Type = integer
Valid values: 0 = Use your system default browser (default). 1 = Use Microsoft Internet Explorer.
Specifies the locale (language) to use for online help.
For example, even though you installed the French version of the Revit software, you can specify that you want to access the English version of the online help.
Type = string
Default = the language code for your installed software, such as enu or fra
[Documentation] OnlineHelpLocale=enu HelpBrowser=0