Not many people even know about the wiki site. Maybe it should be on the Graalonline page, when I say this I mean make it easier to locate. As for making it detailed and of a high level of vocabulary wouldn't be the wisest move unless you planned on making two separate sections, one for which children browse and check whether they are interested in the game, mostly consisted of pictures and easy to read language and a second section for adults/parents/guardians to give them a insight on what they may be buying for their children.
As for me I just merely told my parents what the game was about and what the benefits were of upgrading my account and they agreed to pay for me