Today, many Orthodox churches in the Middle East use Arabic as the language of the Divine Liturgy, often mingled with Greek. When did this practice begin?
I assume that at the time of the Muslim invasions the only liturgical languages in use were Greek and Syriac, and I can't imagine that the Orthodox Christians at that time were too keen on immediately adopting the language of the conquerors. Nonetheless, this clearly happened eventually. How and when did this shift occur?