Changing from one religion to another is called the same for any of them: conversion.
catholic is a very nice religion and like it but no one knows at all
Catholic is one of them.
From the Catholic point of view the person would be an apostate - one who deserts his religion for another. From the Protestant view - a convert.
There are many places where one can learn about the Catholic religion online. This includes sites dedicated to the Catholic faith, Wikipedia, blogs and forums.
catholic/christian
He's catholic.
The religion of Malta is the Roman Catholic apostolic religion.
The Roman Catholic Church is the world's largest religion, with over a billion members. It includes about one-sixth of the world's population.
The traditional religion of Andorra is the Roman Catholicism. About the 90% of the population are Roman Catholic. One of the two co-princes of Andorra is a Catholic bishop.
About one billion are Catholic; but not all practice the faith
There are many religions in Portugal but the most dominate one is Roman Catholic
This is a statement and not a question. Please rewrite to ask what you want to know.