Below is a collection of common languages for most campaign settings.
Spoken By: Aboleth and other deep sea (aquatic) aberrations
Spoken By: Demons and other chaotic evil outsiders
The language of demons, Abyssal is often spoken by evil spirits.
Spoken By: Derro, inhuman or otherworldly monsters, evil fey
This ancient tongue is spoken by strange eldritch entities, and certain ancient beings.
Spoken By: Aquatic and water-based creatures
The so-called “tongue of the sea” is spoken primarily in the sunken nation of the locathahs— those who trade frequently with the ocean empires often speak this tongue as well.
Spoken By: Flying creatures, air-based creatures
A soft-spoken, breathy language, also known as the “tongue of the heavens.”
Spoken By: Boggards
Spoken By: Angels and other good outsiders
The language of angels.
Spoken By: Humans and the other core races
Spoken By: Cyclops and their kin.
Once the ancient language of the giants, this tongue was created before the rise of humanity by the cyclopes.
Spoken By: Dark creepers, dark slayers, and dark stalkers (creatures of the Dark Folk subtype.)
Spoken By: Dragons, reptilian humanoids
Used By: Drow
Like Druidic, drow sign language is a secret language.
Spoken By: Herbalists, Druids, Good-aligned Fey
Druidic is a secret language known only to followers of the Path of Nature. It is a free language for them; that is, it doesn’t take up a language slot. They are forbidden to teach this language to others, and this language has its own alphabet.
Spoken By: Dwarves
Spoken By: D’ziriak
The insectoid d’ziriak language consists of buzzes and chitters. It is an obscure one known by few outside their race.
Spoken By: Elves, half-elves
Spoken By: Cyclops, ettins, giants, ogres, trolls
This brutish tongue and its numerous minor variants are spoken in any region where the wrath of giants is known.
Spoken By: Gnolls
Spoken By: Gnomes
This language is a sub-dialect of Sylvan, and is infamous for creating increasingly convoluted words to describe very specific things.
Spoken By: Bugbears, goblins, hobgoblins
The official language of hobgoblins, this dialect is similar to the goblin tongue.
Spoken By: Grippli
Spoken By: Halflings
The tongue of Halflings is known to have a unique drawl, and nearly every phrase carries a different innuendo depending on the borough in which it is being used.
Spoken By: Fire-based creatures
Also called the “tongue of fire.”
Spoken By: Devils and other lawful evil outsiders
The language of devils is often spoken by evil spirits.
Spoken By: Undead
An ancient language of the dead, this whispering tongue is shared among undead and is also often associated with necromancy.
Spoken By: Orcs, half-orcs
Spoken By: Proteans, and other chaotic extraplanar entities
Like the proteans chaotic nature, the protean language itself is mutable, evolving so quickly that few outsiders can understand it without magical aid.
Spoken By: Rougarou.
Spoken By: Sphinxes, riddle enjoyers
Spoken By: Centaurs, fey creatures, plant creatures, unicorns
The language of the fey. It has a melodic and rhythmic form, and is difficult to speak without it sounding like a quiet tune to others.
Spoken By: Tengu
Spoken By: Earth-based creatures
Also called the “tongue of earth.”
Spoken By: Treants
A very slow-spoken language, and one largely unknown outside of Treants themselves.
Spoken By: Drow, duergar, morlocks, svirfneblin
This language is derived from an ancient combination of Elven and even older tongues.
Used By: Vegepygmies
Vegepygmy is not exactly a spoken language since vegepygmies cannot speak. They communicate via a crude language of rhythmic taps, beats, and clicks.