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Smut. See Ao3 for full contents.
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Dark Dreamer 5: Linguistic Trauma
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Prowl booted up from deep medical stasis, a process that was far more common than he cared to contemplate. He was looking forward to the results of this round up updates. Master said that he was going to have new languages installed, and be able to learn designations. It was an enticing concept despite how much chaos it was likely to cause until he acclimated to the changes.

He on-lined his optics to the familiar room in medical and the familiar features of the chief-healer.

"Can you understand me?" she asked evenly in the common dialect.

There was a moment as Prowl had to route the information through the much more complex linguistic tree he now possessed. "Yes."

"Good," her frame relaxed slightly. "My designation is Temperance. Try to file that in long-term memory."

Prowl focused inward, attaching the designation next to her readings and 'chief-healer'. Then he purposefully purged it from his working memory and attempted to look it up.

"Temperance," he looked up at her with a touch of surprise at just how much it took to file and retrieve that bit of data. "I believe it worked." He spoke slowly, but he spoke in common as it was the language he had been spoken to in. Why that was important he wasn't sure, but it was how the linguistic protocols were set up.

"Excellent," she brightened considerably. "That one's Jazz."

Prowl looked to where she had motioned. "Master," Prowl said.

"Jazz," she corrected him a bit sharply, causing Prowl to flinch.

"Master's designation is Jazz," Prowl phrased it in a way that indicated he had the information but didn't cause him intense anxiety.

"I like him," Jazz grinned back. "And you're Prowl."

Prowl startled, but quickly settled. Why Master chose to call him something was irrelevant. He was Prowl. He belonged to Jazz.

Yes, he could live with that quite well. He could always create a new designation for himself if he felt the need.

"So I can finally get a real taste of him in the berth?" Jazz rumbled, his entire frame radiating excitement.

"Yes, but do not go close to his spark," Temperance locked Jazz down with a glare. "I mean it. Spark play could extinguish him."

Jazz tensed, his visor brightening as the optics behind it dilated. "You're serious."

"Yes," she crossed her arms and stared at him. "Spark play will extinguish him for at least another century. I've got medical locks on his chamber. Don't override them."

"Right. Got it. No spark play. No overriding the medical codes," Jazz shifted his tone, adding in harmonics of absolute willing compliance that almost no one had heard from him.

Temperance relaxed significantly. "He's worth the work. Worth the wait. It's only a couple centuries."

Jazz simply nodded, allowing his frame language and field to speak for him. "Come Prowl."

"Don't forget his recharge needs. Don't push him like you would an agent," she gave a final warning before they left.

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Smut. See Ao3 for full contents.
archiveofourown dot org/works/562319/chapters/1068371