Differentiation of messages for receivers thereof

An apparatus for sending a message on a data-processing system, the apparatus comprising:

• a plurality of processors;
• a non-transitory computer-readable storage medium coupled to the plurality of processors;
• and
• logic, stored on the computer-readable storage medium and executed on the plurality of processors, for:
• parsing an electronic mail (email) message, sent from a sender for delivery to at least one receiver of a plurality of receivers, to identify at least one original expression therein matching an indication of a pre-defined concept, wherein the receiver is an email user and original expression is a complete sentence;
• determining, for the receiver, a preferred expression of the matched concept, among the corresponding original expression and a set of candidate expressions pre-defined to express the matched concept, according to a rating representing an expected understanding by the receiver, wherein the preferred expression does not include the original expression, wherein the preferred expression is set to an expression having the highest rating representing an expected understanding by the receiver when exceeding the rating of the original expression by a predefined threshold compared to the set of candidate expressions and the preferred expression is not a translation between languages;
• processing the message for the receiver by replacing the original expression with the corresponding preferred expression for the receiver;
• sending the processed message to the corresponding receiver;
• and
• displaying the processed message to the user.