In Google Glass the menu shows the launch keyword of an app. But for example, viewfinder shows as:
"Show viewfinder"
And in the launch keywords list as:
"Show the viewfinder".
It is possible show in the menu the application name, and in the voice list the launch keyword?
What you are talking about with your sample "Show viewfinder" is a Listed Voice Command
If you use in your trigger xml the following code, you will have in your menu "Show Demo", and by voice "Show me a demo" :
<trigger command="SHOW_ME_A_DEMO" />
It is not possible to have a different sentence by voice and menu if you do not take a listed voice command. If you want to use custom trigger word, use this method : Unlisted Voice Command