Tor'theras Falar = Said by Nightborne mobs upon death.
Something originating from Suramar is called "Suramari" or "Suramarian".
Though the Shalassian word is unknown, Nightborne do use the term "honored teacher" like the night elves.
For most of Legion, the language of the nightborne was unnamed, though it was internally referred to as "Shalassian". An official name for the language was only given when playable nightborne were introduced as an allied race.