1. A translation support system concerning a plurality of languages in which a server having a database, a first translation terminal and a second translation terminal are connected together via a predetermined network, and said server comprises: an original registering section which sequentially registers a plurality of original messages to be translated into said database; a first translation acquiring section which provides said first translation terminal with individual original messages having been registered in said original registering section in a referable manner, and acquires a first translated message, translated into a first language, sent from said first translation terminal; a first translation registering section which sequentially registers first translated messages acquired by said first translation acquiring section into said database in association with said original messages to be translated; a second translation acquiring section which provides said second translation terminal with individual first translated messages having been registered in said first translation registering section in a referable manner, and acquires a second translated message, translated into a second language, sent from said second translation terminal; and a second translation registering section which sequentially registers second translated messages acquired by said second translation acquiring section into said database in association with first translated messages to be translated, wherein a plurality of second translation terminals are each connected to said server, said first translation terminal displays an original message supplied from said server and transmits a first translated message translated into a first language to said server, said second translation terminal displays a first translated message supplied from said server and transmits a second translated message translated into a second language to said server, and said first translation acquiring section provides said second translation terminals with respective registered first translated messages in a referable manner, and acquires second translated messages, translated into different languages, sent from said second translation terminals.