[Name] Slarecian Language Virus [Source] Scarred Lands [Symptoms] 
This odd affliction can infect anyone who tries to use magic or even rudimentary means to decipher the language of the Slarecian, an extinct species of evil sorcerers, if the work they are trying to decipher has this specific taint. An infected victim's language is changed to that of the Slarecians (which is gibberish to most natives of Scarn), meaning he can only understand or be understood by another infected victim, and all written language other than Slarecian makes no sense to him. Victims do not realize what has happened to them, as what they say sounds clear to them. The disease is incredibly contagious; anyone who listens to an infected victim risks also becoming infected.