I dunno, I think I can speak fluent dog without an 'emotion sensor' of course my dog is usually saying one of the following:
"That smells pretty good, come on, give us some, please, come on, I will stare at you until you do"
"You're Home, You're Home, You're Home, You're Home, You're Home, You're Home, where have you been? You're Home, You're Home, You're Home, You're Home, You're Home, You're Home, You're Home, You're Home, You're Home, You're Home, You're Home, You're Home, where have you been? You're Home, You're Home, You're Home, You're Home, You're Home, You're Home"
" I need to go out, you don't want me to crap on the floor do you? oh goodness a Blue tongue lizard/possum/passer by to bark at...."
"ENEMY AT THE GATE, ENEMY AT THE GATE, WARNING, ENEMY AT THE GATE, ENEMY AT THE GATE... what he/she/it is a friend? I love you too then, give a good dog a pat new friend?"