Hello, I want to know how to make villages generate in my custom biome

Use

BiomeManager.addVillageBiome

.

And how can I set custom plants to spawn in any biome?

With that I mean custom crops in village farmlands

With that I mean custom crops in village farmlands

 

You'll probably need to register a

VillagerRegistry.IVillageCreationHandler

to generate your own field village component.

I have no idea how to do that

I have no idea how to do that

 

Then start learning. Read the documentation, read the vanilla/Forge code, look for open source mods that add custom village components and read their code.

 

There may even be some tutorials on structure generation out there.

I can generate structures, but don't know how to do that