Wow! This is gorgeous! I don't know why I haven't heard of the deck before! I don't have the deck and haven't seen the booklet so I can't comment on how your website complement it, so bearing that in mind, here's my 2 cents:
From the pics of the cards on your website alone, I can pretty much understand the meanings. But, I am not entirely new to tarot so I can't say if a newbie would be able to do the same with the deck. More importantly, I find that decks based on specific cultures and legends always, always enhance the typical meanings of the cards if I am familiar with the legend/story myself. It's like the characters in the stories are always more 3D and alive, so more than just the Queen of Wands or that man in the 2 of Wands, there's a back story to the figure and your own ideas about the card. For this reason, I think that the folktales you have on your site will be really useful to people who use the deck, and an excellent introduction to Javanes lore for everyone else
One suggestion I would make is to link the individual fokltales to the related cards. From the text on the cards, I can easily look up the corresponding tale, but having a direct link to the cards would make navigation easier. There are also a few grammar typos here and there but they are really minor, and the overall layout of the site is neat and elegant.
Thank you for taking the time to put the site up!