i was wondering if this was possible if you could translate what someone has just said if its in a different language and that the wee box for it to be translated would be down the bootom(just like the handwriting down the bottom)

Current translating software pieces, apart from being expensive, are not vary accurate when it's time to translate complex sentences. Another thing you have to consider is that many people in Messenger chat with lots of abbreviations and spelling errors, which difficults even more the translating task.
To all these add the space that would be needed in memory to store dozens of language dictionaries...

Not a good idea at all, I'm afraid .

ok just an idea lol

I agree with KeyStorm, however I remember there is a pluging that, usgin google translator engine, let's you translate sentences before them being sent (of course you have to put something like /xtranslate ENG-ESP bla bla bla)