8. An information processing method to be performed by an information processing device including a memory unit storing data, comprising the step of receiving a character input representing one of a plurality of expressions of a keyword, wherein said data contains a plurality of stored keywords, a plurality of contents, each being stored in association with at least one of said plurality of stored keywords, and keyword data indicating each keyword of said plurality of stored keywords as being associated with a plurality of potential character inputs corresponding semantically to the keyword but differing in expression, said information processing method further comprising the steps of: retrieving, from among said plurality of stored keywords based on said keyword data, a keyword stored in association with the plurality of potential character inputs which plurality includes the character input that was received; and outputting one of said plurality of contents corresponding to the retrieved keyword.
8. An information processing method to be performed by an information processing device including a memory unit storing data, comprising the step of receiving a character input representing one of a plurality of expressions of a keyword, wherein said data contains a plurality of stored keywords, a plurality of contents, each being stored in association with at least one of said plurality of stored keywords, and keyword data indicating each keyword of said plurality of stored keywords as being associated with a plurality of potential character inputs corresponding semantically to the keyword but differing in expression, said information processing method further comprising the steps of: retrieving, from among said plurality of stored keywords based on said keyword data, a keyword stored in association with the plurality of potential character inputs which plurality includes the character input that was received; and outputting one of said plurality of contents corresponding to the retrieved keyword. 10. The information processing method according to claim 8 , wherein each of said plurality of contents contains a first example sentence described in a first language and a second example sentence describing said first example sentence in a second language different from said first language, said information processing method further comprising the step of outputting said first example sentence and said second example sentence corresponding to the retrieved keyword.