In Russia people don't switch to English to discuss CS, but the whole CS jargon is stuffed with loanwords from English. It normally goes well, Russian is quite

In Russia people don't switch to English to discuss CS, but the whole CS jargon is stuffed with loanwords from English. It normally goes well, Russian is quite flexible with adapting foreign words to its own grammar. What was painful for me is writing about CS in the university (master thesis, some papers to local journals etc). In Russia you are not allowed to write your university contributions in English, apparently because some of your older supervisors will be uncomfortable with reading it. Also you can't use jargon, because university is a serious business, everything should sound very scientific. So I had to invent my own translations of all the terms of interest, and then put the English word in parentheses, so that reader has at least a slightest chance to understand what I'm writing about.