SearchSirihish
The language called Sirihish is the 'common' tongue of nearly all humans and is the unifying cultural element among all races of the Known World. In fact, many historians consider the societies of Allanak and Tuluk to be a single society because of their common linguistic traits (i.e., the use of Sirihish).
Sirihish is quite obviously derived from Late Tatlum, which was the bastardised form of the ancient speech left to the humans after the Dragon's departure from the realm of mortals. It possesses the largest vocabulary, is broadest in aspect and in potential meaning, and is the most capable of abstraction of all the known languages.