Yesterday, my new (Irish) co-worker comes to my desk and asks me a question about an issue in his code.
His commenting all done in Irish.
Him: "If you want me I can translate the comments for you?"
Me: "Ní gá, is féidir liom é a léamh go foirfe." ("No need to, I can read it perfectly fine")
co-worker looking at me like: "wtf just happened?"

After a while, I spotted the issue (I noticed the expected output from one of the functions not being of the correct format - an integer instead of an array).
So I fixed it.

Next day (this morning) I came back at work, looked into my food drawer to see what I would eat for breakfast (yes, I have a drawer specifically for food, and yes, I eat breakfast at work), found a small box containing an Ulster Fry :D

Best breakfast at work in a long time :D