Final answer:
Early Christian Europe predominantly used Latin in the West for religious, scientific, and political purposes, while Greek was used in the Eastern Orthodox Church, and other languages, including Arabic, were used among Christians under Muslim rule in various regions.
Step-by-step explanation:
The language used by early Christian Europe for religion, science, and politics was largely dependent on the location and the dominant branch of Christianity. In Western Europe, where the Roman Catholic Church was based, Latin was the prevailing language used for religious texts, such as the Bible, liturgical services, and communication among the educated elite. It also served as a common language for law and governance in this region. Throughout the Early Middle Ages, the church insisted on the use of Latin rather than the many local languages. The Eastern Orthodox Church, dominant in Eastern Europe, utilized Greek as the language of daily life, state affairs, and church matters.
In regions under Muslim rule, some Christians began using Arabic for Christian texts. Additionally, other languages were accepted for religious use in the Byzantine Empire and among various Christian communities, including Coptic, Syriac, Armenian, Georgian, and others who continued to use their own languages and alphabets. In contrast to the West, the Eastern Orthodox Church did not enforce a standard liturgical language, thereby fostering the use of Greek and other local languages.