A system to apply persona styles to written communications. The system includes a communication analyzer and a modification engine coupled to the communication analyzer. The communication analyzer identifies an element of original content of a written communication and determines that the element of the original content of the written communication is incompatible with a selected persona style. The selected persona style defines a communication style. The modification engine modifies the original content of the written communication to replace the element of the original content with a substitute element that is compatible with the selected persona style.