Exclamationes Latinae! Want to learn what to say when you're at loss for words? Lege id quod Sequitur!
Of course, obviously! (I personally love this word)
Good Gods!(That's one the Romans would have used)
Alas! Oh no! (In Latin literature, the sounds 'Ai' and 'O' were used to represent sadness)
Happy Saturnalia! (See Festa Romana page)
Well Done! (sometimes Ironic)