LanguageMonitor

LanguageMonitor = display-name, filename

Specifies a language monitor that supports the installed printer model.

display-name A user-displayable, descriptive name for the language monitor. This string may not contain commas.
filename Names a DLL that is the language monitor that supports the printer model installed by the Install section of the INF file.

If no LanguageMonitor statement is used in the Install section or a Data section it refers to, then no language monitor is installed for the printer model. In general, language monitors are only useful with bi-directional printers.

It is a good idea to put the display-name string in the [Strings] section of the INF file, along with all the other strings that may be displayed to the user.