how can i change villagers trade

I would like to know this also I would create custom villagers in my old server with the summers command but I have no idea how I include my mods items

Here you are:
https://minecraftcommand.science/shop-generator

@#2 That does not let you put your modded items in it I have tryed Lucky as that is what I used to use on my old server when we was 100% vanilla before we moved to forge lol

But you can do placeholders that you can replace after the command generated:
​like: sell=[iron_sword]  to sell=[testenvironment:better_iron_sword]

The mod items shouldb't be called test once you build it but thanks I give that a try Will cut things down for me for the server if I make a custom pack I include a world :) so that will help thanks.