The Altera Chronicles
Work in progress. D&D languages are being replaced by this list, once it is complete.
Common is the primary one being replaced; there is no universal language any more. There are “Tradespeak” type languages that are shared with other races, and capable of conveying any idea, but it is also well-known that these are lower forms of communication. To gain respect in any land, speaking the true language of that land is highly advised.
Almost every major racial group (those containing more than 2 sub-races; Humans, Elves, and Dwarves being the biggest examples) has its own Tradespeak language as well.