Laudetur Jesus Christus

Laudetur Jesus Christus or is a traditional Catholic salutation, which members of religious communities commonly use, especially those of specific ethnicities. Typical answers to this greeting are Semper laudetur ; In sæcula sæculorum! Amen ; or in æternum! Amen. The Missionary Oblates of Mary Immaculate, however, respond with Et Maria Immaculata. The phrase is also a motto of Vatican Radio.
Pius Parsch notes the traditional Catholic use of this salutation with regard to priests:

"The umanity of Christ is near in the priest. The Catholic people have kept this belief: 'Praised be Jesus Christ' they say whenever the priest comes."

In Luxembourgish, the salutation is translated as “Gelobt sei Jesus Christus”, and taught as “the respectful greeting in addressing a priest”.
Other Christian denominations also use it, including Lutherans and other Protestants, along with some Eastern Christians.