Jim lets slip a swear that won't be in any language the older Kirk is familiar with but that the Nexus will helpfully translate to something very inappropriate with a 'netch', whatever those are. With swears though, no one needs to know the details. The awed disbelief in his voice and the gape of his jaw says all it needs to.

To say nothing of the relief that floods his face soon after. Jim's honestly tearing up a bit and has to quickly duck his head so he can school his expression.

"I...wow. That's. I'm so glad he's okay. I won't-I won't say anything. It's just such a relief. He got you back after all. I'm sure he's happy."