Other contributors have said "How do you say please join us in Italian?" is the same question as "How do you say join in Italian?" If you believe that these are not asking the same thing and should be answered differently, click here
how do you say Italian in Italian? well i guess you could just say Italian but the right way to say it is 'italiano' if you are speaking to Italians! Italiano
In Italian it translates to unitevi a noi. Always remember that depending on the context of your sentences, the translation can vary. There may also be slang terminology if you were to travel to...