Deep Speech is the language of Aberrations and Mindflayers. When written by mortals, it used the gnomish pictograph as the only way to properly convey the language is with esoteric symbology. This secretive nature of Deep speech is to enshroud the meaning of its contents in secrecy from non-speakers. It is an extremely complex and highly contextual language reliant heavily on more than just sound, but also tone and inflection.
It utilizes body language, smells, trilling, gurgling, and a whole manner of unpleasantries which is despised by mortals and possesses an Achilles heel to poor creatures that even dare to learn. It didn’t have any specific script until the mortals written in the Espruar script. So this Espruar was acted like the d&d deep speech translator.
Creation
Deep Speech was created by the Aboleths, so it is one of the oldest languages. It is the sound of stars forming in the void and collapsing, of galaxies, swirling. It is the sound of a glacier’s relentless advance, the roar of an earthquake. I like to think of it as a guttural popping and slurping sounds as if an octopus was out of the water.
From a language perspective, the language is often written in Elvish as it was first documented by the Drow and other denizens of the Underdark.
Aspects of Deep Speech
Script: Espruar
Spoken By: Aboleths, Cloakers, Aberrations, Mind Flayers and Beholders.
Alphabet: Gnomish Pictograph
Availability: Obscure
Usage: Racial
Telepathy
Many have mistaken Deep speech to be a telepathic language. Probably because it is widely spoken by Aberration who we all know most of them to be mouthless. However, this widespread view is not true as the language is used by telepathic creatures and it is not telepathic in itself because of the fact that it can be spoken too.
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Languages
Your race indicates the languages your character can speak by default, and your background might give you access to one or more additional languages of your choice. Languages are subdivided into Standard and Exotic.
Choose your languages from the Standard Languages table, or choose one that is common in your campaign. With your GM’s permission, you can instead choose a language from the Exotic Languages table. You will find a table of the sub-division of these languages below.
D&D 5E STANDARD LANGUAGES
| Language | Typical speakers | Script |
| Common | Humans | Common |
| Dwarvish | Dwarves | Dwarvish |
| Elvish | Elves | Elvish |
| Goblin | Goblinoids | Dwarvish |
| Halfling | Halflings | Common |
| Orc | Orcs | Dwarvish |
| Gnomish | Gnones | Dwarvish |
| Giant | Ogres, Giants | Dwarvish |
D&D 5E EXOTIC LANGUAGES
We included the DND 5e Languages in the table above. But for the sake of newbies, it is best to differentiate the 5e exotic languages with another table.
| Language | Typical speakers | Scripts |
| Abyssal | Demons | Infernal |
| Celestial | Celestials | Celestial |
| Draconic | Dragons, Dragonborn | Draconic |
| Deep speech | Aboleths, Cloakers | |
| Undercommon | Underworld traders | Elvish |
| Infernal | Devils | Infernal |
| Primordial | Elementals | Dwarvish |
| Sylvan | Fey Creatures | Elvish |