Good question @OJMCKEE - I have heard people use Acts 26:14 to say that the language of heaven will be Hebrew, but I’m not sure that’s a valid leap.
To be honest, I lean toward the view that there is no heavenly tongue for this reason:
Language is a cumbersome way of communicating - very inadequate in many ways - so easy to be misunderstood, so hard to find words to express your true meaning, your true feelings - groanings which cannot be uttered.
But in a world where we cannot see each other mind to mind and soul to soul, it’s about the best we can do.
But in the world where all our imperfections are passed away and we are not embarrassed for our hearts to be naked before one another, where the body of Christ is as One as Christ and the Father are One (John 17:11), it may be that we will know as perfectly as we are known - and such primitive things as “words” won’t really be necessary.
Jesus knew men’s hearts, and in the resurrection, we will be like Him!