Sondiv is the language used by all of the Atrian tribes, the Iwabas, the Vwasak, the Swamad, and the Zwahan. It is the Atrians main language, but when they crashed on Earth, they were encouraged to speak English. Not many words are known for sure, but some include...
Iwap : Private parts (Male)
Suvek : Blast (Also translated to flash)
Mirzan : Flight Recorder
Setiv : Love
Sutuziv : Unity
Sondiv is a very hard language to master. Roman confessed that even his Sondiv was rusty in Season 1, Episode 2.