The spoken Slavic tongues resemble one another more closely than do those of the Germanic and Romance groups; yet, although Slavic languages have much in common in basic vocabulary, grammar, and phonetic characteristics, they differ with regard to such features in many instances. One feature common to most of them is the relatively large number of consonant sounds. A striking instance showing divided usage is the varied position of the primary accent in the individual Slavic languages. For example, in Czech the stress falls on the initial syllable of a word and in Polish on the next-to-last syllable, whereas in Russian and Bulgarian the accent can fall on any syllable.Grammar
Grammatically the Slavic languages, with the exception of Bulgarian and Macedonian, have a highly developed inflection of the noun, with up to seven cases (nominative, genitive, dative, accusative, locative, instrumental, and vocative). The Slavic verb usually takes one of three simple tenses (past, present, and future), but it is further characterized by a complex feature called aspect, which can be either imperfective (showing continuous or repeated action) or perfective (denoting a completed action). Participles and gerunds are often employed where in English clauses would be used. The article is lacking in all Slavic languages except Bulgarian and Macedonian. Members of the Slavic subfamily are more conservative and thus closer to Proto-Indo-European than languages in the Germanic and Romance groups, as is witnessed by their preservation of seven of the eight cases for the noun that Proto-Indo-European possessed and by their continuation of aspects for the verb.
The vocabulary of the Slavic languages is substantially of Indo-European origin; there is an important Balto-Slavic element as well. Loan words or loan translations can be traced to the Iranian and Germanic groups and also to Greek, Latin, and Turkish. More recently, Italian and French have had some measure of influence. Slavic languages have also borrowed from each other. They tend, however, to translate and imitate foreign words rather than directly absorb them.
It is in writing, perhaps, that the most dramatic differences among the Slavic languages occur. Some Slavic languages (notably, Czech, Slovak, Slovenian, and Polish) are written in differing versions of the Roman alphabet because their speakers are predominantly Roman Catholic. Other Slavic languages (such as Russian, Ukrainian, Belarusian, Macedonian, and Bulgarian) use variations of the Cyrillic alphabet as a result of the influence of the Orthodox Eastern Church. Serbo-Croatian has several dialects, the most important of which are Serbian, which is written with the Cyrillic alphabet, and Croatian, which is written with the Roman alphabet.
The invention of the Cyrillic alphabet is ascribed traditionally to Cyril, a Greek missionary sent by Constantinople to the Slavic peoples in the 9th cent. A.D., although it may have been the work of his followers. The Cyrillic alphabet was augmented with signs based on the Greek alphabet, added to denote Slavic sounds not found in Greek. So far as is known, no writing in a Slavic language existed before the 9th cent. A.D.; the oldest Slavic texts to survive are in Old Church Slavonic and belong to the 10th and 11th cent.
See also the articles on many of the languages mentioned and Indo-European.