Biome Ideas

You should call the mod Biomes+. Here are some biome ideas. Make an obsidian desert. You could make obsidian sand and make cactus spawn everywhere. If you smelted the obsidian sand, it would either make obsidian or black stained glass, your choice. Maybe add structures to some of the biomes.

make a biome where the grass is grey and dull, and the mobs that would normally spawn in a plains biome are there but a creepy mutated version, because there are lakes and ponds of some mutation liquid (idk) that corrupts them

A forest of brown mushrooms, with some mobs like mooshrooms. (like mushrooms coming out of them.)

Add a deep sea biome with creatures like anglerfish, goblin shark, basking shark, and those giant tube worms maybe as an animated plant? The bottom could be made of a mix between stone, cobble, obsidian, and magma blocks.

Why not a better swamp biome?

You should call the mod "A Place To Stay" because of the mod giving more choices for living in New places.

Some ideas:

Frutal biome: a biome with trees that give all kinds of fruits

Descended biome: a very rare biome with creatures that came from heaven itself

Ascended biome: a very rare biome with blocks, mobs and structures straight from nether

Not-loaded biome: a biome with blocks that glow, but look like the place was infected by a computer virus, you know what I mean

Also I can help with Spanish translation