Illustrative embodiments provide a computer implemented method, a data processing system and a computer program product for transforming character data input between a first writing system and a second writing system. The computer implemented method comprises receiving character data input of a first writing system and ensuring the character data input contains normalized characters. A predefined transform is selected based on the character data input of the first writing system and output to a second writing system to transform the normalized characters of the first writing system to character data output of the second writing system, and providing the character data output to a display process.