Some more (repeated) suggestions as I continue my Southeast Asia playthrough. Japan and Korea, and to a lesser extent India, keep stealing all the wonders. Here's some easy ways to fix this:
Shwedagon Paya: requires gems (so Burma, India, Dravidia, Thailand, Java, and Khmer can all build it, but not AI Japan or Korea)
Pramban: requires dye*, but city must border a water tile (so Khmer, India, Malay, and Java can build it, but not India in Delhi or Pataliputra)
Borobudur: requires banana (so Khmer, Malay, Dravidia, Thailand, and Java can built it, but not AI Japan or Korea)
*edit: this is actually a Hindu wonder so the usual suspects don't steal it, it probably doesn't need a resource associated with it at all
The Japan and Korea AI often beeline Shwedagon Paya (and Japan will almost always try to get Borobudur too). Java at least can do something about this, but I have been unable to play the war galley trick as Burma because your only port is so far away compared to Java and its war galleys it gets on spawn.
I know that DOC isn't trying to be a historical determinist game, which is why I chose resources all these south/southeast Asian countries have, so any of them can build these wonders (and nothing stops a player from doing weird stuff for the sake of wonders!). I'm just tired of Japan and Korea sniping every Buddhist wonder there is with little counterplay available. Also my monthly shill post for more Asian wonders.