I think stephenM's idea is better than the 'translated greetings' .. but..
no emoticons in automated messages, because its.
- not needed
- not neccesary that you always want to show same kind of feeling every time you use a specific statement.
but i figure that these kind of messages could be good for teaching games and/or reviews, so allowing them to be automatically translated to whomevers native tounge on the fly is a great idea