Congregation for Divine Worship and the Discipline of Sacraments
(On certain matters to be observed or to be avoided regarding the Most Holy Eucharist)
Chapter 5: Certain Other Matters Concerning the Eucharist
2. Various Circumstances Relating to the Mass
[110.] “Remembering always that in the mystery of the Eucharistic Sacrifice the work of redemption is constantly being carried out, Priests should celebrate frequently. Indeed, daily celebration is earnestly recommended, because, even if it should not be possible to have the faithful present, the celebration is an act of Christ and of the Church, and in carrying it out, Priests fulfill their principal role.”
[112.] Mass is celebrated either in Latin or in another language, provided that liturgical texts are used which have been approved according to the norm of law. Except in the case of celebrations of the Mass that are scheduled by the ecclesiastical authorities to take place in the language of the people, Priests are always and everywhere permitted to celebrate Mass in Latin.
[114.] “At Sunday Masses in parishes, insofar as parishes are ‘Eucharistic communities’, it is customary to find different groups, movements, associations, and even the smaller religious communities present in the parish.” While it is permissible that Mass should be celebrated for particular groups according to the norm of law, these groups are nevertheless not exempt from the faithful observance of the liturgical norms.