In this case we can follow the history and find the marks of a learned behavior, a miracle feigned as a status indicator, beginning with Agnes Ozman among jive Protestants. ("Well we were just discussing that speaking in 'tongues' would mean your baptism really worked, and now this young lady is babbling.  It's a mir-a-cull!")  

One wonders why the existing evidence does not convince you and you need new evidence. 
 What evidence at all would convince you?  Is the scientific finding that the glossolalia is not a tongue not enough?   See WJ Samarin, "The Linguisticality of Glossolalia" just to start.

Even avoiding the feigned extraordinary charisms:  Per Pope John Paul II, "there can be no conflict between fidelity to the Spirit and fidelity to the Church and her Magisterium."  Yet these 'charismatics' teach strange doctrines (which they do not deign to defend theologically) about Baptism and Confirmation and their liturgy does not conform to what the Church teaches and expects.