Is there any holy language for Christians according to words of Jesus Christ and the apostles? The Jews have Hebrew. Muslims have Arabic. Hindus have Sanskrit.

For Christians, is there any holy language? Is there any holy language for Christians according to words of Jesus Christ and the apostles (from New Testament)?
Essentially, no: there is no language specified for religious use in Christianity.

From the early days of the Church, there was variety in religious language. The Western Church primarily spoke Latin (the vernacular) while the Eastern Church spoke Greek (again, the vernacular).

Various churches have languages that have special status, especially for liturgy. For instance, Latin still has a special status in the Latin Rite of the Roman Catholic Church; Old Church Slavonic is the liturgical language of the Russian Orthodox Church (among others); Syriac is used by the Maronite Church and the Syriac Orthodox Churches (again, among others). Hebrew and Greek obviously have a special importance as the languages of the Bible.

But none of these languages is as tightly bound to religious identity as Arabic, Hebrew or Sanskrit are to Islam, Judaism and Hinduism respectively.

(If I were to theorise, I would suggest that this is due to the nature of the development of these religions. Whereas those religions developed mainly in one culture, Christianity rapidly spread to and developed in multiple cultures. So it is not bound to one specific culture or language in the same way.)