Is that a fake it till you make it thing 
? Never been to one of those churches.
@VICJAY if you mean speaking demonic language there is a mantra that @Micah got from Fastos for that (I am planning to start it as soon as I finish the 40 days of the mantra I am doing) I don’t know if it works or not.
Fastos And Meton reveal secret Tongues of Demonology/Angelology in O.P. post