I'm new here, but I like the site so far so I thought I'd offer some help. I'm also a native English-speaker, so I would like to see more of the site translated into English.
I found many places in the site where the English translation was worded strangely, but I could still understand what it was trying to say. One exception, though, would be this part of the "Game Guide":
The families creatures, what is it ?
At the opening of World Gothicat, each species had only one variety of creatures (adults) comes in different colors. Now, each species has 4 different creatures that make up a family (two parents and two small). Your role is to bring together families of creatures you adopt!!
I don't know if I'm missing something here, but I really don't know what this is trying to say. It seems that you just ran the French version through Google translate. That's perfectly fine, but Google translate sometimes make mistakes. What I think you meant was,
"The creature families, what are they?
At the opening of Gothicat World, each species had only one kind of creature (adult) that came in different colors. Now, each species has 4 different creatures that make up the family (two parents and two young). Your role is to bring together the families of creatures by adopting them!"
I don't know if that is what you meant, but it makes a little more sense.
This part of the Game Guide:
"Can I have multiple accounts ?
No! It is strictly forbidden! The game is not to multiply account for held more creatures and more likely to have the rare creatures."
Would make more sense if it were written like this:
"
Can I have multiple accounts?
No! It is strictly forbidden! If you have multiple accounts you will have more creatures and you are more likely to have the rare creatures."
Sorry if this is not what you meant by errors in translation. I think this site has great potential, but many people would decide not to join because of the language barrier.
Also, the "Who are the Administrators Site of Gothicat World?" section of the Game Guide should be called "Who are the Administrators of Gothicat World?". Again, the wording of that section is a bit confusing, but I believe "artisits" is supposed to be "artist".
And in the "How did you create this site" section of the Game Guide, you have the word "webseit", which should be "website".
I found many other places that are a bit confusing, so if this is what you meant by errors in translation I would be happy to help with the translation.
Hope I helped!