Analysis of information sources in references of the Wikipedia article "Tridentine Mass" in English language version.
At the end of the sixteenth century missionaries of India of the Latin rite were allowed to celebrate Mass in Syriac.
In 1886 it arrived to the Principality of Montenegro, followed by the Kingdom of Serbia in 1914, and the Republic of Czechoslovakia in 1920, but only for feast days of the main patron saints. The 1935 concordat with the Kingdom of Yugoslavia anticipated the introduction of the Slavic liturgy for all Croatian regions and throughout the entire state.
The right to use the Glagolitic [sic] language at Mass with the Roman Rite has prevailed for many centuries in all the south-western Balkan countries, and has been sanctioned by long practice and by many popes.
Let no one eat or drink of the Eucharist with you except those who have been baptized in the name of the Lord.
These Masses come from the Tsiatak Nihonon8entsiake, or Book of Seven Nations, published in Montreal in 1865 for the American Indian mission of Lake of Two Mountains, which contained both Mohawk-speaking and Algonquin-speaking Catholics. This mission, like others in the area, was permitted to use the vernacular for the sung propers and ordinaries of the Roman Mass.
We decided to entrust this work to learned men of our selection. They very carefully collated all their work with the ancient codices in Our Vatican Library and with reliable, preserved or emended codices from elsewhere. Besides this, these men consulted the works of ancient and approved authors concerning the same sacred rites; and thus they have restored the Missal itself to the original form and rite of the holy Fathers. When this work has been gone over numerous times and further emended, after serious study and reflection, We commanded that the finished product be printed and published.
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
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