It was a french translation of the visual novel "Higurashi no Naku Koro ni" by 07th Expansion. The other one that didn't complete was "Umineko no Naku Koro ni".

That's the one: https://www.senscritique.com/contact/Saffran_Prod/507351

Note that an English translation of both games exist under the name "When they Cry", available on Steam, among others. It is actually a reedition of the game and not translated by the same person.