The linked project web site (https://free.oberon.org/en) proudly features a video with a thumbnail showing a rendition of the USSR's parliament, the so called Supreme Soviet, with some screenshots added in.
Extremely poor taste.
I think some of the devs are Russian and a quick scan of the video doesn't show anything other than a shared screen for the bulk of the time (using the mouse to grab the time pointer and move it quickly through the length of the presentation).
I suppose it's just imagery from the heyday of Wirth's Oberon, ca 1987.
BTW Oberon was / is not just a language, but a whole very interesting interactive computing environment.