Abstract: A document composition supporting method and system for the support of document editing or translation use a data-based electronic terminology dictionary which is composed such that terms in standard expression and terms in alternative spelling/expression corresponding thereto are registered in association with each other. The terminology dictionary is stored in a CD-ROM, floppy disk or the like and the contents of the terminology dictionary are loaded into a hard disk of a computer system such as personal computer. The terminology dictionary is used to search an inputted document for terms in the document matching with terms in standard expression and terms in alternative spelling/expression registered in the terminology dictionary, and the result of search is displayed on a display unit.

Abstract: In machine translation from a first language text such as a Japanese text to a second language text such as an English text, if information necessary for the translation is not directly expressed or is not sufficiently hinted at in the first language text, such information is requested by the translation machine to supplement the first language during inputting of the first language text or pre-editing thereof.