First time I went to a Python conference in SV, more than a decade ago, I kept hearing "Pie-thon" everywhere, and had no idea what the hell people were talking about.

I took me a solid half hour to at last understand this pie-thingy was Python... in my head I had always pronounced it the French way. Somewhat like "pee-ton", I don't know how to transcribe that "on" nasal sound... (googling "python prononciation en francais" should yield a soundtrack for the curious non-French speakers).

Picture 18 year old me in 1995, I got a 486SX laptop as a graduation present out of the blue from my estranged father. I wanted to add an external CD-ROM to it so I could play games and load software for college, and it had a SCSI port. I went to the local computer store and asked the guy for a "ess see ess eye" CD-ROM drive, he busted out laughing and said "oh you mean a scuzzy drive?" Very embarrassing for me at the time but that's when I learned that computer acronyms have a preferred pronunciation so I should try to learn them myself to avoid future confusion.

It's even more visible in non-English speaking countries. In Poland: first everyone says Java as Yava and after a while they start to switch to a proper English pronunciation. Many times it divides amateurs from professionals, but I wouldn't really know, because I don't work with Java.

Not the one I was thinking of but same point :) https://fs.blog/2015/01/richard-feynman-knowing-something/