Jebediah, being on the edge of what humans are willing to accept as normal, has spent his life using everything he can to fit in. It’s not a strain at this point, just habit, and he’s always been good at it. Mimic body language, watch how many gestures make their way into an average conversation, even slip into the accent of an area. 

As a result, he picks up local accents very quickly, within days or less depending on how many people he’s talked to. You can practically hear his voice and phrasing changing during the first conversation. He also picks up on languages extremely quickly. 

The most hilarious demonstration of this is when he picks up a heavy Southern accent, while still in an impeccably tailored suit, before his body language swings from “refined” to “country farmer person”. It’s like if someone’s butler started using words like “y’all” all of a sudden. 

Unsurprisingly, he can do excellent impressions, down to voice and tone. His voice doesn’t go very high, so there’s an upper limit on pitch, but he can get a surprising amount of bass out of such a narrow chest.

When left to his own devices, in an area with no strong accents or a mix of them, he tends to go back to his own accent- just a touch of something vaguely African, few to no contractions, minimal body language with mostly hand gestures that don’t go past the elbow. 

When he’s tired, though, all bets are off on what accent he’ll settle on. You better hope it isn’t Italian, that is way too many gestures for a tired person with that much arm to be using. 

And if he’s just been woken up, it’s a tossup as to what language he’ll be speaking. It’s going to be heavily accented, may or may not be a mix of words from multiple languages, and is still going to sound more eloquent than most people. He has the ability to look exactly like he knows what he’s talking about at all times, and it serves him well.