By the way, there's one Cyrillic programming language still in wide use today. It's part of 1С (1S), an ERP system that's absolutely everywhere in Russia.
The language itself is quite similar to Visual Basic. It's awkward to write with a regular Russian keyboard layout, but I was told that there exist special layouts just for it.
I had to deal with 1C once for a client who insisted on reconciling his (mid-9 figure) assets into it. The good part of it is that a competent 1C programmer (of which he had 2) can basically make it do anything, exactly like SAP, but the out of the box experience is terrible.
There's also Kumir, which is an educational programming language used in Russian schools
I’m curious, why is it awkward to write with a regular Russian keyboard layout? Presumably due to punctuation and not due to the Cyrillic characters?