Which Direct X are you using? That may be the issue.Bro, the Mapuches civ textures are bugged. I put some screenshots down there (I guess I did it right xdd)
Anyway, nice mods. I love a lot your Bolivia mod, Leugi-sempai.
If I have to guess, I'd say the load order changed which is why it was working before but not since you added new (my mods). Nothing in the Kuikuro or Spy mod interact with Calendar, so I don't think its something specific introduced by my mods. However, it might be the references set by the Spy mod changed the load order in such a way that whatever mod is the problem is now loading after PeC instead of before (or the game is just completely ignoring references and doing a random order, like it does for no reason). You can try to force PeC to load last with your current set of mods and see if it makes a difference.