I am not very fond of the charismatic movement, but I am not against it either.

I have heard about the real tongue gift and read stories about them, of course, being Catholic I searched the catholic version of tongues.

There are a few examples of saints who spoke in other nation's languages without them knowing, while preaching to them.
There were instances of priests spoke in Bahasa but never had any knowledge of Bahasa, while praying for malaysians in UK and Ireland.

I believed those are real.

However there is also the version where the lead (pastor etc) started shimbala kala shumbi malakala shumbilakala

and everyone besides just started mumbo jumbo the same way.
Any new friends who just joined then started to mumbo jumbo

Was it due to peer pressure?
To feel belonged in the group?
or is it really speaking in tongues?

I never ask. I do not think I am in the position to blasphemy against Holy Spirit.
I am also happy my friends feel closer to God with it than without it.

The gifts are meant for increasing one's faith...be it speak in tongues, prophesy, etc.

I however disagree with some churches pastor who repeatedly ask the congregation to speak in tongues, desire tongues etc rather than increase his or her faith.
would you like me to come to your house for a visit and say "Where is my gift, J?"
wouldnt you respond "IM YOUR GIFT!"

The church members from the church that I attend to on every Saturday do the same.

They pray in foreign language which is alien to me. I did ask about that and they said it's angel language or the language that was used by Jesus during the ancient time.