Evidently, it pops up in the proposed new translation of the Roman missal. And one bishop used a lecture last week to speak up about what he thinks is wrong with the new translation:

Bishop Donald W. Trautman of Erie, Pa., former chairman of the U.S. bishops’ liturgy committee, sharply criticized what he called the “slavishly literal” translation into English of the new Roman Missal from the original Latin. 

He said the “sacred language” used by translators “tends to be elitist and remote from everyday speech and frequently not understandable” and could lead to a “pastoral disaster.”

The vast majority of God’s people in the assembly are not familiar with words of the new missal like ‘ineffable,’ ‘consubstantial,’ ‘incarnate,’ ‘inviolate,’ ‘oblation,’ ‘ignominy,’ ‘precursor,’ ‘suffused’ and ‘unvanquished.’ The vocabulary is not readily understandable by the average Catholic,” Trautman said. 

The [Second Vatican Council’s] Constitution on the Sacred Liturgy stipulated vernacular language, not sacred language,” he added. “Did Jesus ever speak to the people of his day in words beyond their comprehension? Did Jesus ever use terms or expressions beyond his hearer’s understanding?”

There’s more at the link. Bring your dictionary.