1Corinthians 13:3

[Paul Younan]

Not only because of its "holy" status, but also because of common sense. Most of the Church understands it. Those who don't can get it translated by those who do. The Patriarch knows Aramaic best, and there can only be one language to use in church affairs in things are to remain consistent and efficient.

I would like to add that Paul as a Pharisee would definitely have viewed both Hebrew and Aramaic as "holy languages", since both are present in the scriptures he used.