What language do demons speak 5e?
The abyssal language was the language of demons.
Abyssal is the language of Demons and Chaotic Evil outsiders. The planes of The Abyss and Pandemonium are where they would be common. Infernal is the language of Devils and Lawful Evil outsiders. The planes of Baator and Gehenna are where they would be common.
Spoken by. Abyssal is the language of demons.
A sound like "clashing metal" and/or "hatred" self-evidently describes death metal vocals.
The devil mostly speaks a language of his own called Bellsybabble which he makes up himself as he goes along but when he is very angry he can speak quite bad French very well though some who have heard him say that he has a strong Dublin accent. The name "Bellsybabble" is a pun on Beelzebub, "babble" and Babel.
Sadly, in 5e there is no “language of the dead” or anything similar, most undead are either mindless and don't speak anything, or they speak the languages they knew in life, which could be anything.
Asmodeus (/ˌæzməˈdiːəs/; Ancient Greek: Ἀσμοδαῖος, Asmodaios) or Ashmedai (/ˈæʃmɪˌdaɪ/; Hebrew: אַשְמְדּאָי, ʾAšmədʾāy; see below for other variations), is a prince of demons and hell. In Judeo-Islamic lore he is the king of both daemons (jinn/shedim) and demons (divs).
Infernal is the language spoken by the devils of the plane of Shavarath.
Celestial is the language spoken by celestials, such as the archons of the plane of Shavarath. In addition, some of the archons' eternal enemies, the demons and the devils, may also speak the language of Celestial.
Speakers of Undercommon include the aboleth, choker, chuul, cloaker, delver, drider, drow, duergar, dwarf, githyanki, githzerai, grimlock, kobold, kuo-toa, orc, rakshasa, roper, svirfneblin and mind flayer races. Undercommon is written using the Espruar alphabet.
Who speaks Daelkyr?
Daelkyr is the language of the daelkyr and their creations, as well as the other inhabitants of the plane of Xoriat. The daelkyr brought their language with them from Xoriat when they invaded Eberron 9,000 years ago. The daelkyr language is the root language for Deep Speech.
Spoken by. Sylvan is the language of the fey creatures that inhabit the planes. Creatures of fey origin on Eberron, such as eladrin, elves, and gnomes may also speak Sylvan.

Languages: You can speak, read, and write Common and Infernal.
The primordial sound waves have been translated into frequencies we can hear. They sound like a constant humming and are made up of a primary wave (the lowest tone) and higher overtones. The "whooshing" oscillation sounds you hear were produced during the processing to make this sound file.
Gnomish sounds very much like Lojban rather than newspeak.
Jesus Was Likely Multilingual
Most religious scholars and historians agree with Pope Francis that the historical Jesus principally spoke a Galilean dialect of Aramaic.
Indic traditions. In Vedic religion, "speech" Vāc, i.e. the language of liturgy, now known as Vedic Sanskrit, is considered the language of the gods.
Xenoglossy (/ˌziːnəˈɡlɒsi, ˌzɛ-, -noʊ-/), also written xenoglossia (/ˌziːnəˈɡlɒsiə, ˌzɛ-, -noʊ-/) and sometimes also known as xenolalia, is the supposedly paranormal phenomenon in which a person is allegedly able to speak, write or understand a foreign language that they could not have acquired by natural means.
Chalcatongo Mixtec is spoken mainly in Oaxaca, Mexico, and is considered the weirdest language because it is the most unique when compared to the other languages spoken throughout the world.
A tiny tribe living deep in Brazil's Amazon rainforest has some of the world's top researchers questioning the fundamentals of human language. The Pirahã tribe speaks a rare and mysterious language of the same name that might be completely different from every other language in the world.
What language is necromancy?
The word necromancy is adapted from Late Latin necromantia: a loan word from the post-Classical Greek νεκρομαντεία (nekromanteía), a compound of Ancient Greek νεκρός (nekrós, or 'dead body') and μαντεία (manteía, or 'divination').
Background. Asmodeus is one of four Princes of Hell along with his siblings Azazel, Ramiel and Dagon. He was created by Lucifer himself, making him one of the oldest demons that ever existed. According to Lucifer, Asmodeus is his weakest creation. Gabriel's story also called Asmodeus the weakest of the Princes of Hell.
A tall beautiful woman with long pink hair with magenta tips.
Asmodeus, Hebrew Ashmedai, in Jewish legend, the king of demons. According to the apocryphal book of Tobit, Asmodeus, smitten with love for Sarah, the daughter of Raguel, killed her seven successive husbands on their wedding nights.
If tieflings can be considered to have their own language, it is Infernal, the language of devils. Others learn Abyssal after a supposed demonic ancestor, although many tieflings do not truly know their ancestry, and some learn the wrong language.