I really like the idea of hopping to different islands each in their own little bubble of history. I think I understand the basic ideas from the english translation, but I'll try to make my comments rely too much on it. I think I generally agree with Lari that changing the layout of the rules will help make them clearer.
Calling out themes and having each player be in charge of the theme that they're most interested in is very neat and direct! And I like that the way those themes are often put in conflict is through the factions and individual people of each island, putting the focus on the personal implications of the abstract ideals. I think I might appreciate a little more guidance on what could keep the player characters all in the same game together - my read so far is that themes are never in harmony, so that working alongside other players means you are either waiting to be in competitions against them, or you are currently caught up in such a competition.