Classes can periodically give ways 5e player's handbook to extra dialects. Druids, for instance, concentrate on Druidic, a language that is at first solely accessible to Druids. Cheats' Cant, a language comprised of words and vernaculars from different dialects, is one more choice for rebels. If you have any desire to advance whatever number dialects as would be prudent, there's a stunt that can help. An etymologist is the program's name, and it empowers you to learn three new dialects.