sorry folks, I wont let this one go!
The following is a passage from Paige Patterson. The Troubled, Triumphant Church: An Exposition of First Corinthians.
"Paul then arrived at the conclusion of the whole matter. The church was to covet the gift of prophecy and was not to forbid speaking with tongues. 'Forbid' means to 'hinder,' 'restrain,' or 'prevent.' The statement once again emphasizes the relative unimportance of tongues in comparison with prophecy. However, the Corinthians were not to prevent speaking with tongues. Precisely what Paul meant by this must be understood in the light of the total emphasis of chapter 14. The Corinthian effort at tongues had been reduced in every conceivable way to a position of relative unimportance.
In addition to this, six principles governing the use of tongues in the Corinthian congregation have already been given, and a seventh will follow in the last verse. These principles effectively circumscribe the use of tongues altogether in the assembly of believers. Nevertheless, for two reasons Paul said that tongues are not to be forbidden. First, he had already allowed that if one engaged in ecstatic utterance in privacy, while there was no real significance, edification, or meaning to be found in it, it was not thereby evil or wrong. That private experience might be permitted to the person. In the second place, Paul knew that the Acts phenomenon of speaking the wonderful works of God in a language in which the speaker was untutored had really happened. Furthermore, Paul knew that under the right circumstances it might happen again. The necessity for the revival of the sign gifts such as tongues seems to be unlikely, but Paul did allow the possibility."
Patterson, Paige. The Troubled, Triumphant Church: An Exposition of First Corinthians. Eugene, OR: Wipf and Stock Publishers, 2002. pp. 268-9.
Seems the president of SWBTS did not have a problem with private prayer language in 2002, wonder why he has not come out in support of Jerry Rankin or Wade Burleson?