It's actually never come to my mind that there are only English programming languages
So programmers in China and Russia also using only English programming language?
So programmers in China and Russia also using only English programming language?
Similarly, Github doesn't have localised versions.
There are certainly clones in other languages (e.g. https://teratail.com/ clones SO in Japanese), but it shows how little demand there is when these well-funded platforms for developers de-prioritise local versions. I couldn't imagine a comparable platform for lawyers or accountants doing same thing.
Comment-wise, many companies use Chinese comments in code while many use English as well.
And yes, most of the time, Chinese and Russian programmers use the same languages as the rest of the world...