So now that it’s confirmed Bavel has just been talking in the guardian language all this time: 

Fanud basically says “I’m just doing my job” (like “don’t scold me, this is what I gotta do, right?” )

Etelan means “my role/my duty/my purpose” and the suffix -en means “mine”. 

Fanud: “wow ok my bad I didn’t know we spoke the same language but now that I say this out loud that’s super xenophobic of me, I’m sorry”