HR: Hey you really need to be more sensitive with what you say

Dev: What makes you bring this up?

HR: Well we had a concerned employee overhear you telling one of the interns that the Russian word for “approved” is “blyat”.

Dev: Ah.

So, polyglot projects, what's the highest number of programming languages in a single project you've worked with?

>= rant
While its really hard to get code wrong in Rust, it is also really hard to get code right in Rust. It took me a considerably long time to write a code which returns the first word in the sentence

I felt the borrow checker introduces a steep learning curve into Rust which is otherwise a beautiful language according to me. C++, my current favorite language, also suffers the same problem with respect to certain language features.