His first language is Russian, but grew up in the US.
From first hand experience as a person who grew up in a household with two completely different languages, this seems to come from having trouble of finding the right language to speak in for a little time until I can finally settle in on a language which makes most sense.
It would be surprising if it were a language issue, given Bach speaks accented english much more rapidly than the host speaking mostly unaccented english. It seems received or an personality/attitude thing, or maybe it's a substance use issue. Anyway, Bach is interesting enough I'm putting up with it, but I rarely feel so irritated and resentful of a person, so if someone else is repelled by it, stick with the podcast as Bach makes it worth while.
It doesn't really bother me, but for what it's worth, the host (Lex Fridman) has stated that it's simply the way he speaks as a result of his brain trying to choose what thread to follow and what to say
Lex's comment toward the end that lawyers are the substrate of reality won me over. That's hilarious. Was distracted by his mien, but funny justifies all.
From first hand experience as a person who grew up in a household with two completely different languages, this seems to come from having trouble of finding the right language to speak in for a little time until I can finally settle in on a language which makes most sense.
This or something absolutely different.