The Bible talks about speaking in tongue in several passages.
It's an experience available to every born again Christian without any exception.
Unfortunately many Christians stop after a first experience where they pronounced a few words or few phrases.
The Bible shows that speaking in tongue is the expression of the Holy Spirit through us.
Do you think that the Holy Spirit is limited to a few dozen of words in His language through us?
Of course not.
Speaking in tongue is a full language, complete and abundant.
So don't limit yourself to a few repetitive words or phrases always similar. The Holy Spirit wants to express Himself in a complete manner through us. A standard common language consists in several thousand words. Speaking in tongue is exactly the same thing.
Spend time with the Holy Spirit so that He can help you to supplement your language.
Bye for now.