these are some examples, to me it sounds like somewhat hebraic and also beautiful and also not gibberish and screaming and weird and convulsing on the floor (this would be symptomatic of demonic possession)
this is what the praying in tongues at the fellowship group that baptized me sounds like this first example has a hispanic accent
k like this was the best example I could find lol
here is a how to but he only prays in tongues a tiny bit at the end