Thanks for the translation.
When possible we write COEURS (Hearts) like this: CŒURS, it's a French typographic rule. But I know a lot of fonts which are not multilingual don't have the "Œ" ligature glyph.
The way I'm building it I've got 2 codes—CŒURS and COEURS—for the same icon, so if people can't input Œ on their device (for whatever reason) then they still have the other one. I'm doing something similar with TRÈFLES/TREFLES (though I know there's a different issue there with accents on capitals).