Religious language consists of words/phrases designed to give glory to God, mark religious events and to increase fellowship amongst religious believers. For example, many evangelical Christians address their fellow Christians as sister/brother followed by the person's first name (for example, Brother Mark). Many Christians like to wish people a Merry Christmas in the public sphere and in their jobs.
With the growing desecularization of the world in the 21st century due to the influx of religious immigrants into the Western World and the higher birth rates of religious conservatives, religious language will become more and more common throughout the world - including the Western World (see: Decline of global atheism). No doubt this will be upsetting to those who have endeavored to enforce political correctness such as militant atheists that are a part of the secular left.