As both your description and fans seem to be French, why don't you change the name to La Coeur de Cristal?
this was originally a video game of the Galoxyum studio,not ours. i just can say that it have no special reason,though,i am agree with you that it could seem strange at first.
but this video game earned some success and this is why we (the cosmos studio) have choose to buy the title right,so today this choice in title is no more an idiot choice as we plan to release a new game "crystal's heart" in a future.
today two video games are in work in our studio ; golden heart which is a little inspired by this title both in french an english, and further it will be crystal's heart 2,there too both in french and english.
i hope you have your answer
wish ya a nice day,
Anon Hosuka
Developer
Cosmos studio.