Other people in the industry know multiple languages and translate. Also, reading is much easier than writing. So, I'd say that, with maybe help of Google translate, a majority of people would be able to read those. Given I read and write English relatively well, I'd also help out with efforts whenever it was needed.

Anyway, you'd be surprised at how much documentation and resources are available in Portuguese. You can get by alright with it. I did it when I was younger and eager to learn how to code.

I've worked in big companies in Brazil where docs and comments were mostly in Portuguese. And some teams would even use Portuguese variable names.

Just because they do it differently in Russia, it doesn't mean every country is like that. Remember what you said about bubbles and all.

By the way, interestingly, I've briefly worked for the government there once and it was one of the places where English was most prevalent. People there were very open source oriented, which the Brazilian government incentivizes (at least used to back then). So, nearly all code had English comments and docs. Differently from closed source intiatives in the industry where other people reading it was considered a liability and not a goal.