Typically.
It depends greatly on the Denubian, and whatever their current state is. In principle they could form two identical mouths, vocal cords, or ones close enough to speak the same, but that sort of misses the point of the complexity of their language, which is also tonal based.
As you can imagine, the dialogue can get very tricky to follow. Group round tables are positively maddening, particularly during disagreements.
And there is just some stuff that doesn’t translate into Universal.
I think that’s one reason so many people are wary of verbal agreements with Denubians, you can never be sure your ear was able to process all of the “small speak” of the stated agreement, particularly if they are speaking at a frequency outside ones hearing range.