Can someone explain the French meme to me? I feel like I've missed several references. Obviously it's a joke about UTF-8 and the characters in the title, but I don't get it.
"Martine écrit en UTF-8" is what you get if you interpret the UTF-8 string "Martine écrit en UTF-8" (Martine writes in UTF-8) as Latin-1. It's not as common as it once was, but that kind of encoding issue used to be encountered fairly often by French speakers on the Web.
https://www.casterman.com/Jeunesse/Catalogue/vive-la-rentree...
EDIT: for a short course in contemporary french slang, one could do worse than https://www.google.com/search?q=martine+parodie&udm=2
(my favourite being "Martine and her parodies")