Access Fandom

My current fandom, Miraculous Ladybug, originated in France and takes place in Paris. While there is an English dub available, the majority of the fandom uses the French name for one of the main character's superhero identity - most likely because the French version was available before the English dub was, and fandom adopted the French name early on. (The other superhero's name was always in English.)

The problem with this? The superhero's French name is Chat Noir; in French, it's pronounced shah.

Is there a way to indicate to screenreaders how a specific word is supposed to be pronounced? Or that it's in a different language? A bit of HTML or something? A possible skin on AO3, or a way for me to make one myself? I personally am planning to stick to the English name either way, but I'd love if there was at least an option to give the rest of the fandom.

Edit: To clear things up a bit: I wanted to know if there's a way to indicate for other people's screenreaders how a specific words is pronounced, or if it should be considered in a different language. So someone posting something here to Dreamwidth, or on AO3, can write it "Chat", but a screenreader will either read it as the French pronunciation or as "Cat".

It's entirely likely that I'm looking for a difficult solution when an easy one will do, or where one isn't needed (I'm sure most folks using screenreaders figure out what's what pretty quick, and again, I'm sticking to the English name myself), but I thought it might be worth asking.