This is another false doctrine that pentecostals/charismatics teach. They divide tongues into two categories: the gift of tongues, which they say not everybody has, and tongues as a private prayer language which they say every Christian can and should have. Actually, there are three categories because most say tongues is the initial evidence of the HS baptism. This not scriptural. Romans 8:26,27 does not teach a private prayer language, as charismatics erroneously claim. A careful and unbiased reading of these verses proves that. In 1 Cor. 12 and 14, Paul is talking about the gift of tongues which is not given to every believer, and, in fact, Paul makes it the least important of the gifts. Conversely, charismatics and pentecostals make it the most important gift and greatly overemphasize it. Thus the charismatics have a multitude of errors on tongues. As I said, I am not a cessationist, but it is clear that if the gift of tongues is still in operation today, it is exceedingly rare, as the mission field proves. And this belief and teaching of a private prayer language in distinction from the gift of tongues is just so much bunk because the scriptures do not teach it.