Relay apparatus, display apparatus, and communication system

A relay apparatus to relay a communication among a plurality of communication terminals including at least a first communication terminal and a second communication terminal, the relay apparatus comprising:

• circuitry configured to:
• store a plurality of pieces of characteristic information, each indicating a characteristic of a user who uses a corresponding communication terminal, so that each of a plurality of pieces of terminal information for identifying the corresponding communication terminal is associated with a corresponding one of the pieces of characteristic information;
• store a plurality of pieces of second dictionary information, each used for converting text data into voice data, so that each piece of the characteristic information is a corresponding one of the pieces of second dictionary information in which the each piece of the characteristic information is incorporated;
• when the text data is received from the second communication terminal that is to communicate with the first communication terminal, select a piece of the characteristic information associated with a piece of the terminal information for identifying the second communication terminal, the characteristic information including at least sex, age, and occupation of the user, and select a piece of the second dictionary information associated with the selected piece of the characteristic information;
• and
• convert the text data received from the second communication terminal into the voice data using the piece of the second dictionary information selected, wherein the user selects one of a plurality of texts displayed on a touch screen by touching and the selected text is converted into a preset voice data that expands the selected text with a larger number of words than the selected text.