Once a language becomes associated with religious worship, its believers often ascribe virtues to the language of worship that they would not give to their native tongues. In the case of sacred texts, there is a justified fear of losing authenticity and accuracy by a translation or re-translation, and difficulties in getting general acceptance for a new version of a text. The sacred language is typically vested with a solemnity and dignity that the vernacular lacks. Consequently, the training of clergy in the use of the sacred language becomes an important cultural investment, and their use of the tongue is perceived to give them access to a body of knowledge that untrained lay people cannot (or should not) access. In medieval Europe, the (real or putative) ability to read (see also benefit of clergy) scripture—which was in Latin—was considered a prerogative of the priesthood, and a benchmark of literacy; until near the end of the period almost all who could read and write could do so in Latin.
Because sacred languages are ascribed with virtues that the vernacular is not perceived to have, the sacred languages typically preserve characteristics that would have been lost in the course of language development. In some cases, the sacred language is a dead language. In other cases, it may simply reflect archaic forms of a living language. For instance, some 17th-century elements of the English language remain current in Protestant Christian worship through the use of the King James Bible or older versions of the Anglican Book of Common Prayer. In more extreme cases, the language has changed so much from the language of the sacred texts that the liturgy is no longer comprehensible without special training.
In some instances, the sacred language may not even be (or have been) native to a local population, that is, missionaries or pilgrims may carry the sacred language to peoples who never spoke it, and to whom it is an altogether alien language.
The concept of sacred languages is distinct from that of divine languages, which are languages ascribed to the divine (i.e. God or gods) and may not necessarily be natural languages. The concepts may however overlap, as expressed for example in Devanāgarī, the name of a script that means "urban(e) [script] of the deities".
Mahayana Buddhism makes little use of its original language, Sanskrit. An unusual form of liturgical language is found in some Japanese rituals where Chinese texts are read out or recited with the Japanese pronunciations of their constituent characters, resulting in something unintelligible in both languages. In Thailand, Pali is written using the Thai alphabet, resulting in a Thai monotone-like pronunciation of the Pali language. In Tibetan Buddhism, Tibetan language is used, but mantras are in Sanskrit.
Christian rites, rituals, and ceremonies are not celebrated in one single sacred language. The Churches which trace their origin to the Apostles have continued to use the standard languages of the first few centuries AD.
- Ecclesiastical Latin in the Latin liturgical rites of the Catholic Church (N.B. While Latin is still the official language of all formal works of the church, it has largely been replaced by the vernacular in liturgical use since 1964.)
- Koine Greek in several Eastern Orthodox Churches and Greek Catholic Church
- Church Slavonic in several Eastern Orthodox Churches
- Ancient Georgian in the Georgian Orthodox Church
- Classical Armenian in the Armenian Apostolic Church
- Ge'ez in the Ethiopian Orthodox Church, Ethiopian Catholic Church and Eritrean Orthodox Church
- Coptic in Egyptian Christianity
- Syriac in Syriac Christianity represented by the Church of the East, Chaldean Catholic Church, and Syrian Catholic Church, and Syrian Orthodox Church
The extensive use of the Greek in the Roman Liturgy has continued up to the present, in theory; it was used extensively on a regular basis during the Papal Mass, which has not been celebrated for some time. The continuous use of Greek in the Roman Liturgy came to be replaced in part by Latin by the reign of Pope Saint Damasus I. Gradually, the Roman Liturgy took on more and more Latin until, generally, only a few words of Hebrew and Greek remained. The adoption of Latin was further fostered when the Vetus Latina version of the Bible was edited and parts retranslated from the original Hebrew and Greek by Saint Jerome in his Vulgate. Latin continued as the Western Church's language of liturgy and communication. One simply practical reason for this may be that there were no standardized vernaculars throughout the Middle Ages. Church Slavonic was used for the celebration of the Roman Liturgy in the 9th century (twice, 867-873 and 880-885).
The vernacular was used in the rite of the Roman Liturgy only among certain Roman Rite Slavs of Croatia and Dalmatia, for example in the so-called Missale Romanum Glagolitice. The particular vernacular was also used in the inquiry of bride and bridegroom as to whether they accepted their marriage-vows itself.
Jesuit missionaries to China had sought, and for a short time, received permission to translate the Roman Missal into scholarly Classical Chinese. (See Chinese Rites controversy). However, ultimately permission was revoked. Among the Algonquin and Iroquois, the received permission to translate the propers of the Mass into the vernacular.
In the 20th century, Pope Pius XII granted permission for a few vernaculars to be used in a few rites, rituals, and ceremonies. This did not include the Roman Liturgy of the Mass.
The Catholic Church, long before the Second Œcumenical Council of the Vatican ('Vatican II') accepted and promoted the use of the non-vernacular liturgical languages listed above; vernacular (i.e. modern or native) languages were never used liturgically until 1964, when the first permissions were given for certain parts of the Roman Liturgy to be celebrated in certain approved vernacular translations. The use of vernacular language in liturgical practice created controversy for a minority of Catholics, and opposition to liturgical vernacular is a major tenet of the Catholic Traditionalist movement.
In the 20th century, Vatican II set out to protect the use of Latin as a liturgical language. To a large degree, its prescription was initially disregarded and the vernacular became not only standard, but generally used exclusively in the liturgy. Latin, which remains the chief language of the Roman Rite, is the main language of the Roman Missal (the official book of liturgy for the Latin Rite) and of the Code of Canon Law, and use of liturgical Latin is still encouraged. Large-scale papal ceremonies often make use of it. Meanwhile, the numerous Eastern Catholic Churches in union with Rome each have their own respective 'parent-language'. As a subsidiary issue, unrelated to liturgy, the Eastern Code of Canon Law, for the sake of convenience, has been promulgated in Latin.
Eastern Orthodox Churches are varied in use of liturgical languages within their Church services. Koine Greek and Church Slavonic are the main sacred languages used in the Churches of the Eastern Orthodox communion. However, The Eastern Orthodox Church permits other languages to be used for liturgical worship, and each country often will have the liturgical services in their own language. This has led to a wide variety of languages used for liturgical worship, but there is still uniformity in the liturgical worship itself. So one can attend an Orthodox service in another location and the service will be (relatively) the same. Liturgical languages used in the Eastern Orthodox Church include (but are not limited to): Koine Greek, Church Slavonic, Romanian, Georgian, Arabic, Ukrainian, Bulgarian, Serbian, English, Spanish, French, Polish, Portuguese, Albanian, Finnish, Swedish, Chinese, Estonian, Korean, Japanese, many African dialects, and many other world languages.
Oriental Orthodox Churches regularly pray in the vernacular of the community within which a Church outside of its ancestral land is located. However some clergymen and communities prefer to retain their traditional language or use a combination of languages.
Many Anabaptist groups, such as the Amish, continue to use High German in their worship despite not speaking it amongst themselves.
Hinduism is traditionally considered to have two liturgical languages, Sanskrit and Tamil. Sanskrit is the language of the Vedas, Bhagavadgita, Puranas like Bhagavatham, and the Upanishads, and various other liturgical texts such as the Sahasranama, Chamakam and Rudram. It is also the tongue of most Hindu rituals.
Tamil is the language of the 12 Tirumurais (which consists of the great devotional hymns of Tevaram, Tiruvacakam etc., )and the Naalaayira Divya Prabhandham (considered to be the essence of the Vedas, in Tamil, and all in praise of Lord Vishnu). These devotional hymns which were sung in almost every Shiva and Vishnu temple of the South India,the then Tamil country and even North Indian temples like Badrinath Temple are considered as the basis for the Bhakti movement which saved the Hinduism from extinction.
The people following Kaumaram, Vainavam, Shaivam sects of South India and use Tamil as liturgical language along with Sanskrit. Divya Prabandha is chanted in most of the South Indian Vishnu temples like Tirupati.(Indian literature(Official Website of Govt of India) . Dravidian people considered their language Tamil to be sacred and divine with equal status to Sanskrit within temple rituals, which is still being followed even by some temples in present day non-Tamil speaking areas. The divya prabhandams and Devarams are referred to as Dravida Vedam (Tamil Veda).
A long standing myth states that Sanskrit and Tamil emerged from either side of Lord Shiva's divine drum of creation as he danced the dance of creation as Nataraja or sound of cosmic force.
- Also most of the devotional texts on Lord Murugan or Subramanian are in Tamil and references in the Ancient Tamil literature traces the origin of Lord Murugan to the Ancient Tamil country.
- Tamils consider their language itself as a goddess TamilThaai. She is worshiped by tamils all over the world. In Madurai, there is a temple for Goddess Tamil Thaai!.
Classical Arabic is the sacred language of Islam. It is the language of the Qur'an, and the native language of Muhammad. Like Latin in medieval Europe, Arabic shares both the role of intellectual language as well as the role of liturgical language in much of the Islamic world. Muslim history, particularly the Nizari-Ismailis of Khorasan and Badakhshan, witnessed and experienced Persian as a liturgical language during the Alamut period (1094 to 1256 CE) and post-Alamut period (1256 to present). Spread of Islam throughout the Malay Archipelago witnessed and experienced Malay as a liturgical language.
Hebrew remains the traditional language of Jewish religious services, though its usage today varies by denomination: Orthodox services are, generally, entirely in Hebrew, Reform services make more use of the national language, and Conservative services usually fall somewhere in-between.
Aramaic too serves in traditional liturgy albeit in a very limited capacity.
Listing of sacred languages 
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- Classical Arabic, the language of the Qur'an; it differs from the various forms of contemporary spoken Arabic in lexical and grammatical areas.
- Aramaic, the mother tongue of Jesus and his disciples. Used by the earliest Christians, the Nazarenes, together with Hebrew for writing the Gospel. Jesus' native western accent survives today in the form of Western Neo-Aramaic in a few remote villages. Aramaic, alongside Hebrew was the language of Post Babylonian Judaism, employed in the Talmud. It also appears in the later books of the Hebrew Bible. It is still used in liturgy today by conservative sects of Judaism, noticeably the Temani.
- Avestan, the language of the Avesta, the sacred texts of Zoroastrianism.
- Classical Chinese, the language of older Chinese literature and the Confucian, Taoist, and in East Asia also of the Mahayana Buddhist sacred texts, which also differs markedly from contemporary spoken Mandarin.
- Coptic, a form of ancient Egyptian, is used by the Coptic Orthodox Church and the Coptic Catholic Church.
- Damin, an initiation language of the Lardil in Australia
- Early Modern Dutch is the language of the Statenvertaling, still in use among (ultra-)orthodox Calvinist denominations in the Netherlands.
- Early Modern English is used in some parts of the Anglican Communion and by the Continuing Anglican movement, as well as by a variety of English-speaking Protestant denominations.
- Eskayan in the Philippines
- Etruscan, cultivated for religious and magical purposes in the Roman Empire.
- Ge'ez, the predecessor of many Ethiopian Semitic languages (e.g. Amharic, Tigrinya, Tigre) used as a liturgical language by Ethiopian Jews and by Ethiopian and Eritrean Christians (in the Ethiopian Orthodox Tewahedo Church, the Eritrean Orthodox Tewahedo Church, and the Roman Catholic Church).
- Early New High German is used in Amish communities for Bible readings and sermons.
- Gothic, sole East Germanic language which is attested by significant texts, usually considered to have been preserved for the Arian churches, while the Goths themselves spoke vulgar Latin dialects of their areas.
- Koine Greek, the language of early Pauline Christianity and all of its New Testament books. It is today the liturgical language of Greek Christianity. It differs markedly from Modern Greek, but still remains comprehensible for Modern Greek speakers.
- Biblical Hebrew - the languages in which the Hebrew Bible Tanakh/Miqra has been written over time; these differ from today's spoken Hebrew in lexical and grammatical areas. Its closest living descendant is the Temani (Yemenite Hebrew).
- Jamaican Maroon Spirit Possession Language, spoken by Jamaican Maroons, the descendants of runaway slaves in the mountains of Jamaica, during their "Kromanti Play", a ceremony in which the participants are said to be possessed by their ancestors and to speak as their ancestors did centuries ago.
- Kallawaya, a secret medicinal language used in the Andes
- Kannada is the language of Vachana sahitya, which is a literature of Lingayatism. Some literature of this religion is also in Telugu and Sanskrit.
- Korean is the language preferred by the Unification Church. Church founder Sun Myung Moon has instructed all Unification Church members to learn Korean because "Korean is the language closest to God's Heart, and the future world language will be Korean".
- Kurdish is the language of the Yazidi and Yârsân.
- Ecclesiastical Latin is the liturgical language of the Latin Rite of the Roman Catholic Church. It is also the official language of the Holy See.
- Old Latin was used in various prayers in Roman paganism, such as the Carmen Arvale, until its very end. These texts were unintelligible to classical Latin speakers and remain somewhat obscure to scholars even today.
- Mandaic, an Aramaic language, in Mandaeanism
- Historian Robert Beverley, Jr., in his History and Present State of Virginia (1705), wrote that the "priests and conjurers" of the Virginia Indian tribes "perform their adorations and conjurations" in the Occaneechi language, much "as the Catholics of all nations do their Mass in the Latin". He also stated the language was widely used as a lingua franca "understood by the chief men of many nations, as Latin is in many parts of Europe"—even though, as he says, the Occaneechis "have been but a small nation, ever since those parts were known to the English". Scholars believe that the Occaneechi spoke a Siouan dialect similar to Tutelo.
- Palaic and Luwian, cultivated as a religious language by the Hittites.
- Pali, the original language of Theravada Buddhism.
- Some Portuguese and Latin prayers are retained by the Kakure Kirishitan (Hidden Christians) of Japan, who recite it without understanding the language.
- Sant Bhasha, a mélange of archaic Punjabi and several other languages, is the language of the Sikh holy scripture Guru Granth Sahib. It is different from the various dialects of Punjabi that exist today.
- Sanskrit, the tongue of the Vedas and other sacred texts of Hinduism as well as the original language of Mahayana Buddhism and a language of Jainism.
- Old Church Slavonic, which was the liturgical language of the Slavic Eastern Orthodoxy, and the Romanian Orthodox Church
- Church Slavonic is the current liturgical language of the Russian Orthodox Church, Orthodox Church of Serbia, Orthodox Church of Bulgaria and the Macedonian Orthodox Church and certain Byzantine (Ruthenian) Eastern Catholic churches.
- Sumerian, cultivated and preserved in Assyria and Babylon long after its extinction as an everyday language.
- Syriac, a type of Aramaic, is used as a liturgical language by Syriac Christians who belong to the Chaldean Catholic Church, Assyrian Church of the East, Syriac Orthodox Church, Syriac Catholic Church, and Maronite Church.
- Tamil is the language of the Shaiva (Devaram) and Vaishnava (Divya Prabhandham) scriptures. It is an inalienable part of temple ritual in Tamil Nadu and other South Indian temples especially during the time of vaikunta ekadasi in vaishnava .
- Classical Tibetan, known as Chhokey in Bhutan, the sacred language of Tibetan Buddhism
- Various Native American languages are cultivated for religious and ceremonial purposes by Native Americans who no longer use them in daily life.
- Yoruba (known as Lucumi in Cuba), the language of the Yoruba people, brought to the New World by African slaves, and preserved in Santería, Candomblé, and other transplanted African religions.
- Buswell, Robert E., ed. (2003), Encyclopedia of Buddhism 1, London: Macmillan, p. 137.
- Salvucci, Claudio R. 2008. The Roman Rite in the Algonquian and Iroquoian Missions. Merchantville, NJ:Evolution Publishing. See also http://mysite.verizon.net/driadzbubl/IndianMasses.html
- Cutler, Norman (1987). Songs of Experience: The Poetics of Tamil Devotion. Indiana University Press.
- Kanchan Sinha, Kartikeya in Indian art and literature, 1979,Delhi: Sundeep Prakashan.
- Nirmal Dass (2000). Songs of Saints from Adi Granth. SUNY Press. p. 13. ISBN 978-0-7914-4684-3. Retrieved 29 November 2012. "Any attempt at translating songs from the Adi Granth certainly involves working not with one language, but several, along with dialectical differences. The languages used by the saints range from Sanskrit; regional Prakrits; western, eastern and southern Apabhramsa; and Sahaskrit. More particularly, we find sant bhasha, Marathi, Old Hindi, central and Lehndi Panjabi, Sindhi and Persian. There are also many dialects deployed, such as Purbi Marwari, Bangru, Dakhni, Malwai, and Awadhi."