Hi Silouan,
Our Orthodox Church down here in the very south of Florida has Spanish Liturgy at least once a month. Being that our Church is located in a Hispanic neighborhood, our mission is to bring them into our Church and embrace their language and culture. So I am assuming that Spanish is an accepted liturgical language. With Vladika's blessing, of course.
Also, pardon my switch from the main topic, but I have a quick question for Matuska Elizabeth.
Matuska, are you now fluent in speaking Spanish? Also, is Irene Perdomo of any relation to you? Irene and I sing in the choir together and her brother happens to be a priest. He (her brother) served in our parish this past Bright Tuesday.
May God Bless
Deborah