In reference to worship, the early Church in the East adopted a principle of worship in the language of the people -- not a single sacred language inaccessible to the average person. So there was variety of languages, but basically, one Divine Liturgy. In this the Orthodox Church followed the lead of St. Paul, who in discussing the uttering of incomprehensible "tongues" in worship, declared in his first letter to the Christians in Corinth, "If I pray in a tongue, my spirit prays but my mind is unfruitful. What am I to do? I will pray with the spirit and I will pray with the mind also; I will sing with the spirit and I will sing with the mind also. (1 Corinthians 14:14-15).Read the rest here.
Like two trains traveling in opposite directions on parallel tracks, the Roman Church is returning to its Latin past, with the hope of recapturing a sense of sacred transcendence in its now popularized worship, while the Orthodox Church is in many ways traveling its historic track of worship toward as fuller practice of worship in the language of the people, while through its rich worship practices, allowing contemporary worshipers to sense the holiness, sacredness and other worldliness of the Kingdom of God.
But there is a rub in all this for the Orthodox. Though we use many different languages in our worship, Greek, Slavonic, Arabic, Romanian and other traditional languages, for many Orthodox these function just like Latin does for the Roman Catholics. It is the language, precisely because it is not understood, because it is exotic, and because of the lack of understanding, that carries for many people the sense of the holy, and not what actually is said and done in worship! Language becomes a barrier to true worship, that is, worship that invites the Orthodox Christian to say with St. Paul "I will pray with the spirit and I will pray with the mind also."
What this seems to point to for the Orthodox is the restoration of the fundamental principle of Orthodox worship, that worship take place in a language understood by the worshippers. However, like the Roman Catholics, but moving in the opposite direction, we have to relearn our tradition, and to do it in a way that accommodates all the faithful Orthodox Christians.