Yes and Old Church Slavonic is a sacred language not a verncular.
Old Church Slavonic (which became Church Slavonic) was, as a spoken language, a vernacular. It was the souther Slavic dialect that Sts. Cyril and Methodius used to create their alphabet.
The Syro-Malabars and Marionites use Syriac as part of their Divine Liturgy, which still is a vernacular language (although it is rarely spoken).
Latin, too, was, originally, a vernacular language.
So, I guess, the real question is: What is a sacred language and when does a vernacular used for sacred purposed stop being "vernacular" and star being "sacred"?
If Church Slavonic qualifies, then one could at least make an argument to qualify Middle- or Early Modern English as well. Both are long dead dialects of a vernacular whose meanings are more fixed.