Articulate staff says that they are not aware of any silent switches on the below URL but I was able to install it silently.
File is installshield based installed and is normally named characterbundle1.exe
Create an answer file using
Collect the setup.iss file, copy it to the source folder and install using something like
characterbundle1.exe /s /f2"C:\windows\logs\characterbundle1Install.log"
Setup Type: Legacy Setup with command line support
Deployment Method Used: Vendor Provided Command Line (answer file driven)