That is always a possibility, although have you ever noticed that every now and then you find out what one actually meant, and what they said is the simplest possible way to say it. In the pilot the first words Kosh says to Sinclair at the docking bay is "Ah Setai Valen". When I watched it on DVD I couldn't believe it, he just came right out and said it in the first episode, of course because it was the first episode no one takes notice or remembers, it's just some alien gibberish right? In other episodes what he says is actually straight forward, "you have forgotten something", "I will meet you at the hour of scampering", "surprise, reflection, terror, for the future", even though its sheridan, he sounded like a vorlon "Beauty in the dark". The Vorlon sound very cryptic, but are actually very straight forward, they say what they mean and mean what they say.