Slavic languages

• 1. Introduction

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  The Slavic languages are spoken by roughly 315 million people, making the Slavic-speaking world the largest ethno-linguistic group in Europe. That number spans an enormous arc of territory: from the Balkans in the south, across Central and Eastern Europe, and all the way east to the Russian Far East and Western Siberia. Yet as recently as the 10th century, every single one of those speakers would have been speaking essentially the same tongue. What fractured one language into more than 20? And what threads still hold them together? Those are the questions this documentary sets out to answer.

  The family tree has three conventional branches: East, West, and South Slavic. Ten of these languages carry official national status, among them Russian, Polish, Czech, Bulgarian, and Serbo-Croatian. But the family also contains smaller members: microlanguages, isolated ethnolects, and peripheral dialects that linguist Aleksandr Dulichenko has catalogued as occupying a space between dialect and language. The answers to how all of this variety arose require going back not centuries but millennia, to a single ancestral tongue that scholars call Proto-Slavic.

• 2. Ancient Roots

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  Proto-Slavic traces its own lineage back through Proto-Balto-Slavic, a stage of development that binds the Slavic family to the Baltic languages in a relationship closer than any other pairing within the entire Indo-European family. The split of the Balto-Slavic dialect that would become Proto-Slavic is estimated, using both archaeological and glottochronological evidence, to have occurred sometime in the period 1500-1000 BCE. That is the point at which the ancestors of Slavic speakers began walking a separate linguistic path.

  The homeland of Proto-Slavic is placed by scholars in the area of modern Ukraine and Belarus, overlapping with the northern portion of the reconstructed Proto-Indo-European homeland. Proto-Slavic itself continued as a living, relatively unified language until around AD 500. Kassian and Dybo's lexicostatistical study, published in September 2015, dates the first major split of Proto-Slavic into Eastern, Western, and Southern branches to around 100 AD, a date that fits archaeological evidence of Slavic populations already dispersed across a large territory in the early first millennium. Then, in the 5th and 6th centuries AD, each of those three branches nearly simultaneously subdivided, tracking the rapid spread of Slavic peoples through Eastern Europe and the Balkans.

  A minority of scholars have questioned even the Balto-Slavic link itself, arguing that Lithuanian, Latvian, and the now-extinct Old Prussian differ so radically from Slavic that the two groups could not have shared a common parent after the breakup of Proto-Indo-European. But substantial advances in Balto-Slavic accentology over the last three decades have made that position very hard to maintain, particularly when scholars factor in that there was most likely no "Proto-Baltic" language, and that West and East Baltic differ from each other about as much as each differs from Proto-Slavic.

• 3. How One Language Became Many

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  The Freising manuscripts, the first continuous text in a Slavic language written in the Latin script, already display phonetic and lexical features specific to Slovene dialects, including a phenomenon called rhotacism and the word krilatec. Those manuscripts date from the 9th, 10th, and 11th centuries, which tells us that regional differentiation was visible in writing even before the branches were fully formed.

  Geography accelerated the splintering. In the 9th century, the arrival of the Hungarians in Pannonia inserted a non-Slavic-speaking population between the South and West Slavic groups. Frankish conquests then completed the physical separation, cutting the Moravians off from the Slovene ancestors settled in what is now Styria, Carinthia, East Tyrol, and modern Slovenia. In the Balkans, Slavic speakers flooded in during the declining centuries of the Byzantine Empire, but Greek writing survived in the region, meaning that Slavic speech expanded into an area that already had a competing literary tradition.

  Russian linguist Andrey Zaliznyak added a further complication to the picture. He found that until the 14th or 15th century, the major language divide within East Slavic was not between the regions corresponding to modern Belarus, Russia, and Ukraine. Instead, it ran between the north-west, centered around Velikiy Novgorod and Pskov, and the center, which included Kyiv, Suzdal, Rostov, Moscow, and Belarus. The Old Novgorodian dialect of that era differed from the central East Slavic dialects more sharply than it would in later centuries. According to Zaliznyak, Russian developed through a convergence of the north-western and central dialects, while Ukrainian and Belarusian descended from the central dialects of the East Slavs. Russian linguist Sergey Nikolaev reinforced this picture by arguing that a number of tribes within Kievan Rus had arrived from different Slavic branches entirely and spoke quite distant Slavic dialects.

• 4. The Grammar Within

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  All Slavic languages share fusional morphology, meaning that a single suffix can carry several grammatical functions at once. With the partial exception of Bulgarian and Macedonian, every Slavic language runs a fully developed system of conjugation and declension. The inflections show their ancestry clearly: most Slavic languages conserve much of the inflectional morphology that can be reconstructed for Proto-Indo-European itself.

  One practical effect of this dense system of endings is that word order in a Slavic sentence is unusually free. Because grammatical relationships are marked on the words themselves, the subject, verb, and object can be rearranged for emphasis or style without confusion. Subject-verb-object order with prepositive adjectives is the neutral default, but the grammar does not require it.

  Prefixes and suffixes carry distinct jobs in Slavic word-building. Lexical suffixes always precede inflectional ones, following an agglutinative logic even within an otherwise fusional system. Verbs in particular are modified heavily by prefixes: in Russian, the word vyshel packs the prefix vy-, meaning "out", a reduced root meaning "come", and a suffix marking past tense and masculine gender, all in a single short word. A feminine subject produces vyshla instead, illustrating a gender distinction in past-tense verbs that is rare across the world's language families.

  One system under particular pressure across the family is prosody, the patterning of vowel length, accent, and tone. Common Slavic had a complex pitch-accent system, comparable to modern Japanese. Modern Serbo-Croatian preserves it almost unchanged, with the conservative Chakavian dialect being the most faithful. Macedonian, at the other extreme, has lost the system entirely. Russian and Bulgarian have converted the pitch accent into a stress accent while keeping its mobile position, creating the famous unpredictability of Russian stress. Czech and Slovak preserved vowel length but replaced the tone distinctions with length patterns.

• 5. Scripts, Borders, and Borrowed Words

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  The three conventional Slavic branches are separated not only by phonology and grammar but also by the scripts they use. West Slavic languages and the western members of the South Slavic group, Croatian and Slovene, are written in the Latin alphabet and were historically shaped by Roman Catholicism and proximity to Western Europe. East Slavic and Eastern South Slavic languages use Cyrillic and were shaped by Greek influence through Eastern Orthodox or Eastern-Catholic faith. Two languages, Belarusian and Serbo-Croatian, are biscriptal: both alphabets are in use either now or in the recent past.

  Modern Russian shows an unusually high percentage of non-Slavic vocabulary compared with the rest of the family. Dutch supplied naval terms during the reign of Peter I. French brought household and culinary vocabulary during the reign of Catherine II. German contributed medical, scientific, and military terminology in the mid-1800s. Each wave of borrowing left a traceable layer in the lexicon.

  The traffic ran the other way as well. Romanian, Albanian, and Hungarian each drew at least 15 percent of their total vocabulary from neighboring Slavic languages, particularly for terms relating to urban life, agriculture, crafts, and trade. German acquired Grenze ("border") from Common Slavic granica. The English word quark, used both for a kind of cheese and for a subatomic particle, entered through German Quark, which itself descends from Slavic tvarog, meaning "curd". The Czech word robot has spread into most of the world's languages. English "vampire" passed through French and German before arriving from Serbo-Croatian vampir, ultimately continuing Proto-Slavic ǫpyrь, though scholar K. Stachowski has proposed an alternative origin in early Slavic vąpěrь, tracing back to Turkic oobyr. The word vodka, borrowed from Russian, descends from the Common Slavic word for water, voda, with a diminutive suffix attached.

• 6. Mutual Intelligibility and the Limits of the Family Tree

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  Slavic languages diverged from their common ancestor more recently than any other branch of the Indo-European family. That late divergence means there is still a great deal of shared vocabulary and grammar across the group. Yet two speakers of geographically distant Slavic languages can find spoken communication cumbersome, even when the written forms are more mutually accessible.

  Recent quantitative studies of mutual intelligibility have produced a finding that surprised many. The traditional three-branch division does not hold up well when tested with data. Grouping Czech, Slovak, and Polish together as West Slavic checks out. But Serbo-Croatian and Slovene, both classified as Western South Slavic, turn out to be closer to Czech and Slovak than to Eastern South Slavic Bulgarian. That result cuts across the conventional family tree.

  Within individual languages, dialect variation can range from minor to dramatic. Russian dialects vary relatively little. Slovene dialects vary to a much greater degree. Transitional and hybrid dialects often fill the gaps between languages: Slovak (West Slavic) and Ukrainian (East Slavic) are bridged by Rusyn, spoken in Transcarpathian Ukraine and adjacent parts of Slovakia. The Croatian Kajkavian dialect sits closer to Slovene than to standard Croatian. Those boundary cases are exactly why Kassian and Dybo excluded Slovenian from their 2015 analysis: Ljubljana koine and Literary Slovenian both show mixed lexical features of Southern and Western Slavic, possibly pointing to a Western Slavic origin that was later overlaid by Serbo-Croatian influence. The Interslavic language, standardized in 2011 after the merger of several older projects, represents a modern attempt to navigate all of this complexity by building a language on material the modern Slavic tongues genuinely share.