as Kazakhstan and Kyrgyzstan have very large minority Slavic populations with most being Russians. Kazakhstan has the largest Slavic minority population. Languages Proto-Slavic, the supposed ancestor language of all Slavic languages, is a descendant of common Proto-Indo-European, via a Balto-Slavic stage in which it developed numerous lexical and morphophonological isoglosses with the Baltic languages. In the framework of the Kurgan hypothesis, "the Indo-Europeans who remained after the migrations [from the steppe] became speakers of Balto-Slavic". Proto-Slavic is defined as the last stage of the language preceding the geographical split of the historical Slavic languages. That language was uniform, and on the basis of borrowings from foreign languages and Slavic borrowings into other languages, it cannot be said to have any recognizable dialects, which suggests that there was, at one time, a relatively-small Proto-Slavic homeland. Slavic linguistic unity was to some extent visible as late as Old Church Slavonic (or Old Bulgarian) manuscripts which, though based on local Slavic speech of Thessaloniki, could still serve the purpose of the first common Slavic literary language. Standardised Slavic languages that have official status in at least one country are: Belarusian, Bosnian, Bulgarian, Croatian, Czech, Macedonian, Montenegrin, Polish, Russian, Serbian, Slovak, Slovene, and Ukrainian. Russian is the most spoken Slavic language, and is the most spoken native language in Europe. The alphabets used for Slavic languages are usually connected to the dominant religion among the respective ethnic groups. Orthodox Christians use the Cyrillic alphabet while Catholics use the Latin alphabet; the Bosniaks, who are Muslim, also use the Latin alphabet and Cyrillic alphabet in Serbia. Additionally, some Eastern Catholics and Western Catholics use the Cyrillic alphabet. Serbian and Montenegrin use both the Cyrillic and Latin alphabets. There is also a Latin script to write in Belarusian, called Łacinka and in Ukrainian, called Latynka. Ethno-cultural subdivisions West Slavs originate from early Slavic tribes which settled in Central Europe after the East Germanic tribes had left this area during the migration period. They are noted as having mixed with Germanics, Hungarians, Celts (particularly the Boii), Old Prussians, and the Pannonian Avars. The West Slavs came under the influence of the Western Roman Empire (Latin) and of the Catholic Church. East Slavs have origins in early Slavic tribes who mixed and contacted with Finns and Balts. Their early Slavic component, Antes, mixed or absorbed Iranians, and later received influence from the Khazars and Vikings. The East Slavs