Shalassian is the language of the nightborne. It is an offshoot of Darnassian, similar to Thalassian.[1] Ancient nightborne language is so archaic only the oldest elves might be able to read it.[2]
Nar'thalas vas manari, thala nar'valas = Said by Thalyssra during a spell to create an empathic bond with Theryn, weaving their arcane essences together, to project his memories as visions.[11]
Tor'theras Falar = Said by Nightborne mobs upon death.
Other
Something originating from Suramar is called "Suramari"[12] or "Suramarian".[13]
Though the Shalassian word is unknown, nightborne do use the term "honored teacher" like the night elves.[14]
Notes
For most of Legion, the language of the nightborne was unnamed,[15] though it was internally referred to as "Shalassian".[16] An official name for the language was only given when playable nightborne were introduced as an allied race.
Many nightborne have French-sounding names, such as Arcanist Valtrois, Artificer Lothaire and Brigitte. Ly'leth Lunastre is an even more interesting example, considering her name is formed from "Lune" and "Astre" which respectively mean "Moon" and "Celestial body" in French.
References
^Don Adams on Twitter (2016-09-22). “Correct. It's an offshoot, similar to Thalassian.” (Reply to a player tweet that read, "So it's not Darnassian?")
^Don Adams on Twitter (2016-09-22). “it's a unique dialect of ancient elvish - we haven't actually given a name for it”
^Don Adams on Twitter (2017-03-07). “that's what i've called it internally, but it's not canon” (Reply to a tweet by the Red Shirt Guy that read, "How about Shalassian?")