After watching an episode of English Teacher I saw this guy in the credits. Paweł Straszewski just doing all the voices in dub. I have to remember watching one in Polish now.
It’s a voice-over translation that’s being presented as if it was a dub. We call it „lektor” and it was more popular back in the day due to budget constraints. We got so used to it though that nobody even mentions it.
What I find most interesting about it that it’s done in a way that makes original dialogue kinda audible while the lektor does his impassionate voice-over so you preserve a lot from original acting. Some of the voice-over artists became household brands for particular types of content.
As an example, Tomasz Knapik voiced over loads of stuff that polish TV bought from US in the early 90s so he’s associated with 70-90s TV series. When Kung Fury came out some guys hired Knapik to voice it over to underscore that 80-90s aesthetic even more. You can check it out here.