Secret signs are related to specific careers - poacher or woodsman, for example. Signs can only be understood by another character with the same specific career skill. Signs are pictograms or abstract sigils denoting a concept or thing. They do not compromise a language as such. An enscribed sign corresponds roughly to three words or fewer of Old Worlder, along the lines of 'Danger here Goblins' or 'No gamekeeper here'. Two or more signs can be enscribed, but they cannot be gramatically inter-connected.