Must We Speak Hebrew

It's okay to refer to sacred things in non-Hebrew terms. 

The Apostles did. So did the Jews themselves.

The Apostles used the Greek form of Jesus' Name rather than the Hebrew form, even in writing.

And the Jews used the Greek term Pentecost rather than the Hebrew form when referring to the Feast of Weeks.

Pentecost is not known in the Torah by that name. But it's in the Bible.

Pentecost was a Greek term - yet it was used by Jews, and by the Apostles, to refer to the Feast of Weeks.

So it was considered okay by both Christians and Jews to use Greek terms rather than Hebrew, even when referring to things of utmost sacred importance in both the Gospel and in the Torah. 

Using the Hebrew language doesn't in itself give you any special access to any spiritual blessings that another language can't. 

Hebrew doesn't send any special unseen waves through the universe that can in itself benefit you spiritually.

Neither can any language, because it's the spirit that gives life - the flesh profits nothing.

Jesus' Words are spirit and they are life.