Yes, even if there were some packages with english names, most of the names were translated in french.
You can find them on french packages, or on french leaflets (and in mlp books also ^^)
Here are some pictures of a french leaflet :
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loginSome names were the same as in english (Starshine, Confetti, Parasol for example), some were basic translation (Noeud Papillon for Bowtie), some had nothing in common (Gwendoline for Majesty) and some were translated weirdly, because a word-to-word would have been awkward ("Tic Tac Toc" for Tic Tac Toe, because the french word for tic tac toe is "morpion", which mean louse... !! That was for the fun fact
)
Just ask if you want some french names