"Ex omnibus Christiani orbis" is a Latin phrase that translates to "from all the Christian world." It refers to something that involves or affects all Christians around the world.
Imagine you have a special toy that you want to share with all your friends who live in different houses. You want to invite everyone to come and play with this toy because it's so awesome. "Ex omnibus Christiani orbis" is like saying that the special toy is for all of your friends, no matter where they live.
In the context of Christianity, it means that something is for all the people who believe in Jesus and follow his teachings, no matter where they are in the world. It's like a big group where everyone is included, regardless of where they come from or what language they speak.
For example, imagine the leader of all Christians around the world wants to send a message to them. They would say, "This message is ex omnibus Christiani orbis," meaning that the message is for all the Christian people in the whole world.
It's a way of saying that something is meant for everyone who believes in Jesus, no matter where they live. It highlights the idea that Christianity is a global religion and that all Christians are part of a big family.