Not to be confused with the messages sent on Twitter.
Tweet is the supposed language used by Flickies to communicate with each other. Although other Mobians can't understand what they're saying, Tails' close link with nature means he gets a feeling for what they are saying, even if the words aren't exact. Sonic the Hedgehog initially mocked Tails for believing he understood Tweet, until a Flicky's message led to Sonic and Tails discovering Doctor Robotnik in his new base on Flickies' Island.