14. A system comprising: a display device; a sensor configured to detect user contact; an input device coupled to the sensor; and a processing unit operatively associated with the sensor, the input device, and the display device, the processing unit being configured to: receive a plurality of text units input into a computing device; determine a character variant that is phonetically similar to at least one of the plurality of text units; associate a first portion of a touch-sensitive display with the character variant, wherein the touch-sensitive display is in communicative contact with the computing device; receive a first selection corresponding to the character variant; replace at least one of the plurality of text units with the character variant; receive, by the touch-sensitive display at a second portion of the touch-sensitive display, a second selection of the character variant; based at least upon receiving the second selection corresponding to the character variant, display at least one alternative character; receive a third selection to select one of the alternative characters; and replace the character variant with the selected alternative character.
16. The system of claim 14 , wherein the plurality of text units are input as Roman characters and the character variant is Korean.