1. A computer program product for checking documents using colloquialisms, the computer program product comprising a computer readable storage medium having program code embodied therewith, the program code comprising the programming instructions for: tracking colloquialisms used in messages by users in a social network; identifying relationships between senders and recipients of said messages using said colloquialisms; generating a social graph to depict relations between said users in said social network based on said identified relationships; generating a rule set based on said social graph; and reviewing a document using said generated rule set.