1. A computer program product comprising a computer useable medium including a computer readable program, wherein the computer readable program when executed on a computer causes the computer to: create a translated text in which an original text in a first language is translated into said translated text in a second language while an unknown word not registered in at least one dictionary is left in said first language; display said translated text; and set a link for said unknown word in said first language in said translated text displayed by said displaying of said translated text for which an instruction is provided, such that a search for said unknown word in said first language is conducted using said unknown word as a search word in a predetermined Internet search engine based on said first language.