The "Ordinary Form" (OF) of the Mass, normally celebrated in the vernacular, has been around for the past forty years. Following the declaration a couple of years ago that the 1962 version of the Tridentine Mass had never been abrogated, its use is becoming increasingly widespread under the title Extraordinary Form (EF). When the OF Mass is celebrated in Latin and the priest is facing the same way as the congregation, there is little to distinguish it from the EF, the most noticeable difference being the extended period whilst the priest is reciting the Canon of the Mass (consecration prayers) aloud, which in the EF form are recited silently, whilst the choir, if present, is singing the Sanctus and Benedictus. Thus the OF Mass tends to take about ten minutes longer than the EF. But when the vernacular is used, the potential for things to go wrong is considerable. If, as often happens, the priest is celebrating the Mass in another language, he is liable to be struggling at ti...