As the oldest attested Slavic language, OCS provides important evidence for the features of Proto-Slavic, the reconstructed common ancestor of all Slavic languages.
The name of the language in Old Church Slavonic texts was simply Slavic (словѣ́ньскъ ѩꙁꙑ́къ, slověnĭskŭ językŭ), derived from the word for Slavs (словѣ́нє, slověne), the self-designation of the compilers of the texts. This name is preserved in the modern native names of the Slovak and Slovene languages. The language is sometimes called Old Slavic, which may be confused with the distinct Proto-Slavic language. Different strains of nationalists have tried to 'claim' Old Church Slavonic; thus OCS has also been variously called Old Bulgarian, Old Croatian, Old Macedonian or Old Serbian, or even Old Slovak, Old Slovenian. The commonly accepted terms in modern English-language Slavic studies are Old Church Slavonic and Old Church Slavic.
The term Old Bulgarian (German: Altbulgarisch) is the only designation used by Bulgarian-language writers. It was used in numerous 19th-century sources, e.g. by August Schleicher, Martin Hattala, Leopold Geitler and August Leskien, who noted similarities between the first literary Slavic works and the modern Bulgarian language. For similar reasons, Russian linguist Aleksandr Vostokov used the term Slav-Bulgarian. The term is still used by some writers but nowadays normally avoided in favor of Old Church Slavonic.
The obsolete term Old Slovenian was used by early 19th-century scholars who conjectured that the language was based on the dialect of Pannonia.
Byzantine missionaries standardized the language for the expedition of the two apostles, Cyril and his brother Methodius, to Great Moravia (the territory of today's western Slovakia and the Czech Republic; see Glagolitic alphabet for details). For that purpose, Cyril and Methodius started to translate religious literature into Old Church Slavonic, allegedly basing the language on the Slavic dialects spoken in the hinterland of their hometown, Thessaloniki, in present-day Greece.
As part of preparations for the mission, in 862/863, the Glagolitic alphabet was developed and the most important prayers and liturgical books, including the Aprakos Evangeliar (a Gospel Booklectionary containing only feast-day and Sunday readings), the Psalter, and the Acts of the Apostles, were translated. (The Gospels were also translated early, but it is unclear whether Cyril or Methodius had a hand in this.)
The language and the Glagolitic alphabet, as taught at the Great Moravian Academy (Slovak: Veľkomoravské učilište), were used for government and religious documents and books between 863 and 885. The texts written during this phase contain characteristics of the West Slavic vernaculars in Great Moravia.
Both schools originally used the Glagolitic alphabet, though the Cyrillic script developed early on at the Preslav Literary School, where it superseded Glagolitic as official in Bulgaria in 893.
Later texts written in each of those territories began to take on characteristics of the local Slavic vernaculars, and by the mid-11th century Old Church Slavonic had diversified into a number of regional varieties (known as recensions). These local varieties are collectively known as the Church Slavonic language.
Church Slavonic maintained a prestigious status, particularly in Russia, for many centuries – among Slavs in the East it had a status analogous to that of Latin in Western Europe, but had the advantage of being substantially less divergent from the vernacular tongues of average parishioners.
Example of the Cyrillic alphabet: excerpt from the manuscript "Bdinski Zbornik" written in Old Slavonic, 1360
For Old Church Slavonic, the following segments are reconstructible. A few sounds are given in Slavic transliterated form rather than in IPA, as the exact realisation is uncertain and often differs depending on the area that a text originated from.
The letter щ denoted different sounds in different dialects and is not shown in the table. In Bulgaria, it represented the sequence /ʃt/, and it is normally transliterated as št for that reason. Farther west and north, it was probably /c(ː)/ or /tɕ/ like in modern Macedonian, Torlakian and Serbian/Croatian.
/dz/ appears mostly in early texts, becoming /z/ later on.
The distinction between /l/, /n/ and /r/, on one hand, and palatal /lʲ/, /nʲ/ and /rʲ/, on the other, is not always indicated in writing. When it is, it is shown by a palatization diacritic over the letter: ⟨ л҄ ⟩ ⟨ н҄ ⟩ ⟨ р҄ ⟩ .
The pronunciation of yat (ѣ/ě) differed by area. In Bulgaria it was a relatively open vowel, commonly reconstructed as /æ/, but further north its pronunciation was more closed and it eventually became a diphthong /je/ (e.g. in modern standard Bosnian, Croatian and Montenegrin, or modern standard Serbian spoken in Bosnia and Herzegovina) or even /i/ in many areas (e.g. in Chakavian Croatian, ShtokavianIkavian Croatian and Bosnian dialects or Ukrainian) or /e/ (modern standard Serbian spoken in Serbia).
The yer vowels ь and ъ (ĭ and ŭ) are often called "ultrashort" and were lower, more centralised and shorter than their counterparts i and y/u. They disappeared in most positions in the word, already sporadically in the earliest texts but more frequently later on. They also tended to merge with other vowels, particularly ĭ with e and ŭ with o, but differently in different areas.
The exact articulation of the nasal vowels is unclear because different areas tend to merge them with different vowels. ę /ɛ̃/ is occasionally seen to merge with e or ě in South Slavic, but becomes ja early on in East Slavic. ǫ /ɔ̃/ generally merges with u or o, but in Bulgaria, ǫ was apparently unrounded and eventually merged with ŭ.
Several notable constraints on the distribution of the phonemes can be identified, mostly resulting from the tendencies occurring within the Common Slavic period, such as intrasyllabic synharmony and the law of open syllables. For consonant and vowel clusters and sequences of a consonant and a vowel, the following constraints can be ascertained:
Every obstruent agrees in voicing with the following obstruent
Velars do not occur before front vowels
Phonetically palatalized consonants do not occur before certain back vowels
The back vowels /y/ and /ъ/ as well as front vowels other than /i/ do not occur word-initially: the two back vowels take prothetic /v/ and the front vowels prothetic /j/. Initial /a/ may take either prothetic consonant or none at all.
Vowel sequences are attested in only one lexeme (paǫčina 'spider's web') and in the suffixes /aa/ and /ěa/ of the imperfect
At morpheme boundaries, the following vowel sequences occur: /ai/, /au/, /ao/, /oi/, /ou/, /oo/, /ěi/, /ěo/
As a result of the first and the second Slavic palatalizations, velars alternate with dentals and palatals. In addition, as a result of a process usually termed iotation (or iodization), velars and dentals alternate with palatals in various inflected forms and in word formation.
Alternations in velar consonants
first palatalization and iotation
Alternations in other consonants
In some forms the alternations of /c/ with /č/ and of /dz/ with /ž/ occur, in which the corresponding velar is missing. The dental alternants of velars occur regularly before /ě/ and /i/ in the declension and in the imperative, and somewhat less regularly in various forms after /i/, /ę/, /ь/ and /rь/. The palatal alternants of velars occur before front vowels in all other environments, where dental alternants do not occur, as well as in various places in inflection and word formation described below.
As a result of earlier alternations between short and long vowels in roots in Proto-Indo-European, Proto-Balto-Slavic and Proto-Slavic times, and of the fronting of vowels after palatalized consonants, the following vowel alternations are attested in OCS: /ь/ : /i/; /ъ/ : /y/ : /u/; /e/ : /ě/ : /i/; /o/ : /a/; /o/ : /e/; /ě/ : /a/; /ъ/ : /ь/; /y/ : /i/; /ě/ : /i/; /y/ : /ę/.
Vowel:∅ alternations sometimes occurred as a result of sporadic loss of weak yer, which later occurred in almost all Slavic dialects. The phonetic value of the corresponding vocalized strong jer is dialect-specific.
As an ancient Indo-European language, OCS has a highly inflective morphology. Inflected forms are divided in two groups, nominals and verbs. Nominals are further divided into nouns, adjectives and pronouns. Numerals inflect either as nouns or pronouns, with 1-4 showing gender agreement as well.
Fronting of vowels after palatals and j yielded dual inflectional class o : jo and a : ja, whereas palatalizations affected stem as a synchronic process (N sg. vlьkъ, V sg. vlьče; L sg. vlьcě). Productive classes are o/jo-, a/ja- and i-stems. Sample paradigms are given in the table below:
Sample declensional classes for nouns
Adjectives are inflected as o/jo-stems (masculine and neuter) and a/ja-stems (feminine), in three genders. They could have short (indefinite) or long (definite) variants, the latter being formed by suffixing to the indefinite form the anaphoric third-person pronoun jь.
Synthetic verbal conjugation is expressed in present, aorist and imperfect tenses while perfect, pluperfect, future and conditional tenses/moods are made by combining auxiliary verbs with participles or synthetic tense forms. Sample conjugation for the verb vesti "to lead" (underlyingly ved-ti) is given in the table below.
Written evidence of Old Church Slavonic survives in a relatively small body of manuscripts, most of them written in the First Bulgarian Empire during the late 10th and the early 11th centuries. The language has a South Slavic basis with an admixture of Western Slavic features inherited during the mission of Saints Cyril and Methodius to Great Moravia (863–885).
The only well-preserved manuscript of the Moravian recension, the Kiev Folia, is characterised by the replacement of some South Slavic phonetic and lexical features with Western Slavic ones. Manuscripts written in the Second Bulgarian Empire (1185-1396) have, on the other hand, few Western Slavic features.
Old Church Slavonic is valuable to historical linguists since it preserves archaic features believed to have once been common to all Slavic languages such as these:
Old Church Slavonic is also likely to have preserved an extremely archaic type of accentuation (probably close to the Chakavian dialect of modern Serbo-Croatian), but unfortunately, no accent marks appear in the written manuscripts.
The South Slavic nature of the language is evident from the following variations:
cv, (d)zv from Proto-Slavic *kvě, *gvě < *kvai, *gvai
morphosyntactic use of the dative possessive case in personal pronouns and nouns: 'рѫка ти' (rǫka ti, "your hand"), 'отъпоущенье грѣхомъ' (otŭpuštenĭje grěxomŭ, "remission of sins"); periphrastic future tense using the verb 'хотѣти' (xotěti, "to want"); use of the comparative form 'мьнии' (mĭniji, "smaller") to denote "younger".
morphosyntactic use of suffixed demonstrative pronouns 'тъ, та, то' (tŭ, ta, to). In Bulgarian and Macedonian these developed into suffixed definite articles.
Old Church Slavonic has some extra features in common with Bulgarian:
Near-open articulation [æ] of the Yat vowel (ě); still preserved in the Bulgarian dialects of the Rhodope mountains;
The existence of /ʃt/ and /ʒd/ as reflexes of Proto-Slavic *ť (< *tj and *gt, *kt) and *ď (< *dj).
Use of possessive dative for personal pronouns and nouns, as in 'братъ ми' (bratŭ mi, "my brother"), 'рѫка ти' (rǫka ti, "your hand"), 'отъпоущенье грѣхомъ' (otŭpuštenĭje grěxomŭ, "remission of sins"), 'храмъ молитвѣ' (xramŭ molitvě, 'house of prayer'), etc.
Periphrastic compound future tense formed with the auxiliary verb 'хотѣти' (xotěti, "to want"), for example 'хоштѫ писати' (xoštǫ pisati, "I will write").
The language was standardized for the first time by the mission of the two apostles to Great Moravia from 863. The manuscripts of the Moravian recension are therefore the earliest dated of the OCS recensions.[clarification needed] The recension takes its name from the Slavic state of Great Moravia which existed in Central Europe during the 9th century on the territory of today's western Slovakia and Czech Republic.
This recension is exemplified by the Kiev Folia. Certain other linguistic characteristics include:
Confusion between the letters Big yus (Ѫ) and Uk (оу) - this occurs once in the Kiev Folia, when the expected form въсоудъ vъsudъ is spelled въсѫдъ vъsǫdъ
/ts/ from Proto-Slavic *tj, use of /dz/ from *dj, /ʃtʃ/ *skj
Use of the words mьša, cirky, papežь, prěfacija, klepati, piskati etc.
Preservation of the consonant cluster /dl/ (e.g. modlitvami)
Use of the ending –ъmь instead of –omь in the masculine singular instrumental, use of the pronoun čьso
Old Church Slavonic language is developed in the First Bulgarian Empire and was taught in Preslav (Bulgarian capital between 893 and 972), and in Ohrid (Bulgarian capital between 991/997 and 1015). It did not represent one regional dialect but a generalized form of early eastern South Slavic, which cannot be localized. The existence of two major literary centres in the Empire led in the period from the 9th to the 11th centuries to the emergence of two recensions (otherwise called "redactions"), termed "Eastern" and "Western" respectively. Some researchers do not differentiate between manuscripts of the two recensions, preferring to group them together in a "Macedo-Bulgarian" or simply "Bulgarian" recension. Others, as Horace Lunt, have changed their opinion with time. In the mid-1970s, Lunt held that the differences in the initial OCS were neither great enough nor consistent enough to grant a distinction between a 'Macedonian' recension and a 'Bulgarian' one. A decade later, however, Lunt argued in favour of such a distinction, illustrating his point with paleographic, phonological and other differences. The development of Old Church Slavonic literacy had the effect of preventing the assimilation of the South Slavs into neighboring cultures, which promoted the formation of a distinct Bulgarian identity.
A feature called "mixing (confusion) of the nasals" in which /ɔ̃/ became [ɛ̃] after /rʲ lʲ nʲ/, and in a cluster of a labial consonant and /lʲ/. /ɛ̃/ became [ɔ̃] after sibilant consonants and /j/
Wide use of the soft consonant clusters /ʃt/ and /ʒd/; in the later stages, these developed into the modern Macedonian phonemes /c//ɟ/
Strict distinction in the articulation of the yers and their vocalisation in strong position (ъ > /o/ and ь > /e/) or deletion in weak position
Confusion of /ɛ̃/ with yat and yat with /e/
Denasalization in the latter stages: /ɛ̃/ > /e/ and /ɔ̃/ > /a/, оу, ъ
Wider usage and retention of the phoneme /dz/ (which in most other Slavic languages has dеaffricated to /z/);
Czech (Bohemian) recension is derived from Moravian recension and had been used in the Czech lands until 1097. It's preserved in religious texts (e.g. Prague Fragments), legends and glosses. Its main features are:
PSl. *tj, *kt(i), *dj, *gt(i) → c /ts/, z
PSl. *stj, *skj → šč: *očistjenьje → očiščenie
ending -ъmь in instr. sg. (instead of -omь): obrazъmь
verbs with prefix vy- (instead of iz-)
promoting of etymological -dl-, -tl- (světidlъna, vъsedli, inconsistently)
suppressing of epenthetic l (prěstavenie, inconsistently)
-š- in original stem vьch- (všěch) after 3rd palatalization
development of yers and nasals coincident with development in Czech lands
fully syllabic r and l
ending -my in first-person pl. verbs
missing terminal -tь in third-person present tense indicative
creating future tense using prefix po-
using words prosba (request), zagrada (garden), požadati (to ask for), potrěbovati (to need), conjunctions aby, nebo etc.
Later use of the language in a number of medieval Slavic polities resulted in the adjustment of Old Church Slavonic to the local vernacular, though a number of South Slavic, Moravian or Bulgarian features also survived. Significant later recensions of Old Church Slavonic (referred to as Church Slavonic) in the present time include: Slovene, Croatian, Serbian and Russian. In all cases, denasalization of the yuses occurred; so that only Old Church Slavonic, modern Polish and some isolated Bulgarian dialects retained the old Slavonic nasal vowels.
The Serbian recension was written mostly in Cyrillic, but also in the Glagolitic alphabet (depending on region); by the 12th century the Serbs used exclusively the Cyrillic alphabet (and Latin script in coastal areas). The 1186 Miroslav Gospels belong to the Serbian recension. They feature the following linguistic characteristics:
Nasal vowels were denasalised and in one case closed: *ę > e, *ǫ > u, e.g. OCS rǫka > Sr. ruka ("hand"), OCS językъ > Sr. jezik ("tongue, language")
Extensive use of diacritical signs by the Resava dialect
Use of letters i, y for the sound /i/ in other manuscripts of the Serbian recension
Due to the Ottoman conquest of Bulgaria in 1396, Serbia saw an influx of educated scribes and clergy who re-introduced a more classical form, closer resembling the Bulgarian recension.
The letter Ꙉ was also created, in place of the sounds *d͡ʑ, *tɕ, *dʑ and d͡ʒ,also used during the Bosnian recession.
The Russian recension emerged after the 10th century on the basis of the earlier Bulgarian recension, from which it differed slightly. Its main features are:
The line between OCS and post-OCS manuscripts is arbitrary, and terminology varies. The common term "Middle Bulgarian" is usually contrasted to "Old Bulgarian" (an alternative name for Old Church Slavonic), and loosely used for manuscripts whose language demonstrates a broad spectrum of regional and temporal dialect features after the 11th century.
Use of letters i, y, ě for the sound /i/ in Bosnian manuscripts. The letter Щ was used in place of the sounds *tɕ *ʃt and *ɕ
The Croatian recension of Old Church Slavonic used only the Glagolitic alphabet of angular Croatian type. It shows the development of the following characteristics:
Denasalisation of PSl. *ę > e, PSl. *ǫ > u, e.g. Cr. ruka : OCS rǫka ("hand"), Cr. jezik : OCS językъ ("tongue, language")
PSl. *y > i, e.g. Cr. biti : OCS byti ("to be")
PSl. weak-positionedyers *ъ and *ь in merged, probably representing some schwa-like sound, and only one of the letters was used (usually 'ъ'). Evident in earliest documents like Baška tablet.
PSl. strong-positionedyers *ъ and *ь were vocalized into a in most Štokavian and Čakavian speeches, e.g. Cr. pas : OCS pьsъ ("dog")
PSl. hard and soft syllabic liquids *r and r′ retained syllabicity and were written as simply r, as opposed to OCS sequences of mostly rь and rъ, e.g. krstъ and trgъ as opposed to OCS krьstъ and trъgъ ("cross", "market")
PSl. #vьC and #vъC > #uC, e.g. Cr. udova : OCS. vъdova ("widow")
The core corpus of Old Church Slavonic manuscripts is usually referred to as canon. Manuscripts must satisfy certain linguistic, chronological and cultural criteria to be incorporated into the canon: they must not significantly depart from the language and tradition of Saints Cyril and Methodius, usually known as the Cyrillo-Methodian tradition.
For example, the Freising Fragments, dating from the 10th century, show some linguistic and cultural traits of Old Church Slavonic, but they are usually not included in the canon, as some of the phonological features of the writings appear to belong to certain Pannonian Slavic dialect of the period. Similarly, the Ostromir Gospels exhibits dialectal features that classify it as East Slavic, rather than South Slavic so it is not included in the canon either. On the other hand, the Kiev Missal is included in the canon even though it manifests some West Slavic features and contains Western liturgy because of the Bulgarian linguistic layer and connection to the Moravian mission.
Manuscripts are usually classified in two groups, depending on the alphabet used, Cyrillic or Glagolitic. With the exception of the Kiev Missal and Glagolita Clozianus, which exhibit West Slavic and Croatian features respectively, all Glagolitic texts are assumed to be of the Macedonian recension:
ижє ѥси на нєбєсѣхъ:
да свѧтитъ сѧ имѧ твоѥ·
да придєтъ цѣсар҄ьствиѥ твоѥ·
да бѫдєтъ волꙗ твоꙗ
ꙗко на нєбєси и на ꙁємл҄и:
хлѣбъ нашь насѫщьнꙑи
даждь намъ дьньсь·
и отъпоусти намъ длъгꙑ нашѧ
ꙗко и мꙑ отъпоущаѥмъ
и нє въвєди насъ въ искоушєниѥ·
нъ иꙁбави нꙑ отъ нєприꙗꙁни:
ꙗко твоѥ ѥстъ цѣсар҄ьствиѥ
и сила и слава въ вѣкꙑ вѣкомъ
iʒe jesi na nebesæxɨ
da svẽtitɨ sẽ imẽ tvoje
da pridetɨ tsæsarʲɪzdvije tvoje
da bɔ̃detɨ volʲa tvoja
jako na nebesi i na zemlʲi.
ɣlæbɨ naʃɪ nasɔ̃ʃtɪnɯi
daʒdɪ namɨ dɪnɪsɪ
i otɨpusti namɨ dlɨgɯ naʃẽ
jako i mɯ otɨpuʃtajemɨ
i ne vɨvedi nasɨ vɨ iskuʃenije
nɨ izbavi nɯ otɨ neprijazni,
jako tvoje jestɨ tsæsarʲɪzdvije
i sila i slava vɨ vækɯ vækomɨ
Iže jesi na nebesěxŭ.
Da svętitŭ sę imę tvoje
da pridetŭ cěsar'ĭstvije tvoje
da bǫdetŭ volja tvoja
jako na nebesi i na zeml'i.
hlěbŭ našĭ nasǫštĭnyi
daždĭ namŭ dĭnĭsĭ
i otŭpusti namŭ dlŭgy našę
jako i my otŭpuštajemŭ
i ne vŭvedi nasŭ vŭ iskušenije
nŭ izbavi ny otŭ neprijazni.
jako tvoje jestŭ cěsar'ĭstvije
i sila i slava vŭ věky věkomŭ.
Thou who art in the heavens.
May hallowed be thy name
may come thy empire
may become thy will
as in heaven, also on Earth.
Our supersubstantial bread
give us this day
and release us of our debts
as we also release
and do not lead us to temptation
but free us from the evil.
As thine is the empire
and the power and the glory unto the ages of ages.
The history of Old Church Slavonic writing includes a northern tradition begun by the mission to Great Moravia, including a short mission in the Lower Pannonia, and a Bulgarian tradition begun by some of the missionaries who relocated to Bulgaria after the expulsion from Great Moravia.
Old Church Slavonic's first writings, translations of Christian liturgical and Biblical texts, were produced by Byzantine missionaries Saint Cyril and Saint Methodius, mostly during their mission to Great Moravia.
^Lunt, Horace G. (1974). Old Church Slavonic grammar – With an epilogue: Toward a generative phonology of Old Church Slavonic. Berlin: De Gruyter Mouton. p. 3. ISBN978-3-11-119191-1. Since the majority of the early manuscripts which have survived were copied in the Bulgaro-Macedonian area and since there are certain specifically Eastern Balkan Slavic features, many scholars have preferred to call the language Old Bulgarian, although Old Macedonian could also be justified. In the nineteenth century there was a theory that this language was based on the dialect of Pannonia, and accordingly the term Old Slovenian was adopted for a time.
^Lunt, Horace G. (1974). Old Church Slavonic grammar – With an epilogue: Toward a generative phonology of Old Church Slavonic. Berlin: De Gruyter Mouton. pg 4. ISBN978-3-11-119191-1. "The older term "Middle Bulgarian", invented to distinguish younger texts from "Old Bulgarian" (=OCS), covers both the fairly numerous mss from Macedonia and the few from Bulgaria proper. There are some texts which are hard to classify because they show mixed traits: Macedonian, Bulgarian and Serbian."
^Gamanovich, Alypy (2001). Grammar of the Church Slavonic Language. Printshop of St Job of Pochaev: Holy Trinity Monastery. p. 9. ISBN0884650642. The Old Church Slavonic language is based on Old Bulgarian, as spoken by the Slavs of the Macedonian district. In those days the linguistic differences between the various Slavic peoples were far less than they are today...
^S. Flier, Michael (1974). Aspects of Nominal Determination in Old Church Slavic. De Gruyter Mouton. p. 31. ISBN978-90-279-3242-6. "Old Church Slavic" is only one of many terms(1) referring alternately to the language of a number of translations made by Cyril and Methodius in the middle of the ninth century to be used for liturgical purposes in the Great Moravian State,... (For example, Old Church Slavonic, Old Bulgarian, Old Slovenian.)
^Adams, Charles Kendall (1876). Universal Cyclopædia and Atlas, Volume 10. D. Appleton. p. 561. ISBN9781230102061. Constantine (later called Monk Cyril) founded a literary language for all the Slavs - the so-called Church Slavonic or Old Bulgarian (or Old Slovenian), which served for many centuries as the organ of the Church and of Christian civilization for more than half of the Slavic race.
^Adams, Charles Kendall (1876). Universal Cyclopædia and Atlas, Volume 10. D. Appleton. pp. pg 562. ISBN9781230102061. "At the outset Dobrowsky recognized in it a southern dialect, which he called at first Old Servian, later Bulgaro-Servian or Macedonian. Kopitar advanced the hypothesis of a Pannonian-Carantanian origin, which Miklosich followed with slight modifications. From these two scholars comes the name Old Slovenian. Safarik defended the Old Bulgarian hypothesis, more on historical than on linguistic grounds. The name Old Slovenian is still used because in native sources the language was so-called, slovenisku (slovenica lingua), but it is now known to have been a South Slavic dialect spoken somewhere in Macedonia in the ninth century, having the most points of contact not with modern Slovenian, but with Bulgarian."
^Arthur De Bray, Reginald George (1969). Guide to the Slavonic Languages. J. M. Dent & Sons Ltd. p. 16. ISBN9780460039130. This book starts with a brief summary of the phonetics and grammar of Old Slavonic (also called Old Bulgarian).
^Waldman & Mason 2006, p. 752: "There is disagreement as to whether Cyril and his brother Methodius were Greek or Slavic, but they knew the Slavic dialect spoken in Macedonia, adjacent to Thessalonika."
Čiževskij, Dmitrij (1971). "The Beginnings of Slavic Literature". Comparative History of Slavic Literatures. Translated by Porter, Richard Noel; Rice, Martin P. Vanderbilt University Press (published 2000). p. 27. ISBN9780826513717. Retrieved 9 June 2019. The language of the translations was based on Old Bulgarian and was certainly close to the Old Bulgarian dialect spoken in the native region of the missionaries. At the same time, the brothers [Cyril and Methodius] probably used elements, particularly lexical, from the regions where they were working. [...] The Slavic language used in the translations was at the time intelligible to all Slavs.
^J P Mallory, D Q Adams. Encyclopaedia of Indo-European Culture. Pg 301 "Old Church Slavonic, the liturgical language of the Eastern Orthodox Church, is based on the Thessalonican dialect of Old Macedonian, one of the South Slavic languages."
^R. E. Asher, J. M. Y. Simpson. The Encyclopedia of Language and Linguistics, Introduction "Macedonian is descended from the dialects of Slavic speakers who settled in the Balkan peninsula during the 6th and 7th centuries CE. The oldest attested Slavic language, Old Church Slavonic, was based on dialects spoken around Salonica, in what is today Greek Macedonia. As it came to be defined in the 19th century, geographic Macedonia is the region bounded by Mount Olympus, the Pindus range, Mount Shar and Osogovo, the western Rhodopes, the lower course of the river Mesta (Greek Nestos), and the Aegean Sea. Many languages are spoken in the region but it is the Slavic dialects to which the glossonym Macedonian is applied."
^R. E. Asher, J. M. Y. Simpson. The Encyclopedia of Language and Linguistics, History, "Modern Macedonian literary activity began in the early 19th century among intellectuals attempt to write their Slavic vernacular instead of Church Slavonic. Two centers of Balkan Slavic literary arose, one in what is now northeastern Bulgaria, the other in what is now southwestern Macedonia. In the early 19th century, all these intellectuals called their language Bulgarian, but a struggled emerged between those who favored northeastern Bulgarian dialects and those who favored western Macedonian dialects as the basis for what would become the standard language. Northeastern Bulgarian became the basis of standard Bulgarian, and Macedonian intellectuals began to work for a separate Macedonian literary language. "
^Benjamin W. Fortson. Indo-European Language and Culture: An Introduction, pg. 431 "Macedonian was not distinguished from Bulgarian for most of its history. Constantine and Methodius came from Macedonian Thessaloniki; their old Bulgarian is therefore at the same time 'Old Macedonian'. No Macedonian literature dates from earlier than the nineteenth century, when a nationalist movement came to the fore and a literacy language was established, first written with Greek letters, then in Cyrillic"
^Benjamin W. Fortson. Indo-European Language and Culture: An Introduction, pg. 427 "The Old Church Slavonic of Bulgaria, regarded as something of a standard, is often called Old Bulgarian (or Old Macedonian)"
^Henry R. Cooper. Slavic Scriptures: The Formation of the Church Slavonic Version of the Holy Bible, pg. 86 "We do not know what portions of the Bible in Church Slavonic, let alone a full one, were available in Macedonia by Clement's death. And although we might wish to make Clement and Naum patron saints of such as glagolitic-script, Macedonian-recension Church Slavonic Bible, their precise contributions to it we will have to take largely on faith."
^Slavs had invaded the region from about 550 CE. Curta 2006, p. 214: "At the emperor's request, Constantine and his brother started the translation of religious texts into Old Church Slavonic, a literary language most likely based on the Macedonian dialect allegedly used in the hinterland of their home-town, Thessalonica."
^Silent Communication: Graffiti from the Monastery of Ravna, Bulgaria. Studien Dokumentationen. Mitteilungen der ANISA. Verein für die Erforschung und Erhaltung der Altertümer, im speziellen der Felsbilder in den österreichischen Alpen (Verein ANISA: Grömbing, 1996) 17. Jahrgang/Heft 1, 57–78.
^"The scriptorium of the Ravna monastery: once again on the decoration of the Old Bulgarian manuscripts 9th–10th c." In: Medieval Christian Europe: East and West. Traditions, Values, Communications. Eds. Gjuzelev, V. and Miltenova, A. (Sofia: Gutenberg Publishing House, 2002), 719–726 (with K. Popkonstantinov).
^Popkonstantinov, Kazimir, "Die Inschriften des Felsklosters Murfatlar". In: Die slawischen Sprachen 10, 1986, S. 77–106.
^Stolz, Titunik & Doležel 1984, p. 111: "Specific phonological and lexical differences led Jagić (and many others after him, notably Vaillant) to distinguish carefully between the Western (or Macedonian) OCS of the glagolitic manuscripts and the Eastern (or Bulgarian) OCS of the Suprasliensis…"
^Иванова-Мирчева 1969: Д. Иванова-Мнрчева. Старобългарски, старославянски и средно-българска редакция на старославянски. Константин Кирил Философ. В Юбилеен сборник по случай 1100 годишнината от смъртта му, стр. 45-62.
Alexander, June Granatir (2005). "Slovakia". In Richard C. Frucht, ed., Eastern Europe: An Introduction to the People, Lands, and Culture, Volume 2: Central Europe, pp. 283–328. Santa Barbara, CA: ABC-CLIO. ISBN978-1-576-07800-6.