In this essay the supporting arguments of the Catholic Magisterium regarding the use of liturgical Latin in the Roman Rite are analysed, emphasizing the arguments based on the characters of immutability, nobility and universality of the Latin language. Moreover, some critics of present theologians relating to the concern of Latin being a hindrance to the participatio actuosa to the Holy Liturgy are here examined. Of both positions the effectiveness and ineffectiveness are highlighted. Finally, it is suggested to alternate Latin with (...) national languages, in line with the different phases of the Liturgical action (bilingual diglossy). (shrink)