You are familiar with a little bit of a lot of different languages, and can try to decipher similar languages on the fly.
Benefit: Whenever you encounter creatures speaking a language you don’t know, you can attempt to communicate by using phrases and words from similar languages. This requires you to make a Linguistics check (DC 15) for each concept you try to convey or understand, and even then only simple concepts can be exchanged. (As a general rule, each check allows you to send and receive one ideas that can be expressed with no more than five words, each with no more than one syllable.)
Adventurer’s Handbook: Genius Guide Volume 1