At one point, the crew starts speaking in eastern street slang (known as High Imperial in later Mistborn eras) to annoy Breeze. Aside from Dockson who is speaking gibberish, do we know what they are saying?
Here is the conversation. I have emphasised the eastern street slang:
Spook rushed over and fetched Breeze a cup of wine.
“He’s such a fine lad,” Breeze noted, accepting the drink. “I barely even have to nudge him Allomantically. If only the rest of you ruffians were so accommodating.”
Spook frowned. “Niceing the not on the playing without.”
“I have no idea what you just said, child,” Breeze said. “So I’m simply going to pretend it was coherent, then move on.”
Kelsier rolled his eyes. “Losing the stress on the nip,” he said. “Notting without the needing of care.”
“Riding the rile of the rids to the right,” Spook said with a nod.
“What are you two babbling about?” Breeze said testily.
“Wasing the was of brightness,” Spook said. “Nip the having of wishing of this.”
“Ever wasing the doing of this,” Kelsier agreed.
“Ever wasing the wish of having the have,” Ham added with a smile. “Brighting the wish of wasing the not.”
Breeze turned to Dockson with exasperation. “I believe our companions have finally lost their minds, dear friend.”
Dockson shrugged. Then, with a perfectly straight face, he said, “Wasing not of wasing is.”
Breeze sat, dumbfounded, and the room burst into laughter. Breeze rolled his eyes indignantly, shaking his head and muttering about the crew’s gross childishness.
Mistborn: The Final Empire - Chapter 24