You make me laugh, none of the languages the disciples spoke on the day of Pentecost was a new language, they had been around in one form or another since the Tower of Babel.
Careful, if you are muttering or peeping then you are the one doing the mocking and yes the people doing that, their father would surely tell them not to expose it because it would be revealed for the fraud it is.
Who are you to warn me? I don't mutter or peep. The language I speak to the Lord has syntax and rhythm along with a growing vocabulary.
For someone claiming to be specially blessed by the Holy Spirit you sure don't show much fruit of the love of the Holy Spirit,
Remember what Jesus taught, if you even call me an idiot you are guilty of murder and I think I remember Paul saying no murders would inherit the Kingdom of God, ...calling me a mocker and a swine is far worse then calling me one that can't learn.
I don't see much love here, what with all the negative speech and judgment.