Mantras, conjurations, prayers from any Divine Tradition are always powerful as long as you recite them with faith and cognizance.
The Lord's Prayer recited in Aramaic, Hebrew, Sanskrit or any other "Mantric" language is always powerful!
Latin is a "Mantric" Language.
Mantric, Magic, Priestly Language connects the Soul to the Divine Forces of Nature and the Cosmos.
Weep not: behold, the Lion of the tribe of Judah,
the Root of David, has prevailed to open the book,
and to loose the seven seals thereof. - Revelation 5: 5