I can’t think of why you’d report this unless you had a serious issue with the lecturer or they were being purposefully inappropriate.
'Eh, what's that.. that, uh, the name of that function?'
It's pretty easy to mishear it, but 99% of the time you can see from the context that they're not just wildly dropping n-bombs..
Edit: TIL there's a Wikipedia article dedicated to the "r after every word" in Beijing dialect: https://en.wikipedia.org/wiki/Erhua
Source: lived in Beijing for 5 years & wife is from Beijing.
There is of course no issue at all.
If you listen to any native Mandarin speakers for more than 5 minutes you'll likely hear this word. If anything, being educated of it's existence allows you to recognize it as a legit word used in every Mandarin and not freak out when you hear Chinese people talking and think they're talking smack about black people.
This whole thing is just silly.