Religious Americans call this "Speaking in Tongues" and not everyone who is doing this at the same time in the same room, is speaking the same language. It's quite bizarre, the first time anyone actually sees it happen, but if you just sit back and watch it like a stage play, it's truly interesting.
I've often wondered if there are some of us who tap into parallel lives/past lives where we speak/spoke other languages and dialects, and if some of us are also manifesting a connection that's coming via telepathic/intergalactic energy waves, which may have been here, circling in our energy waves, for centuries, just waiting for the right transceivers to pick them up.
But the people I've met who can write and speak some of these unusual characters and language know they are being spoken through and communicating with a group of Others who are not earth humans. The characters are vaguely familiar to me, from a time in 1967 when I was being taught symbols and a language... and I was TOLD it was from a different race of people who are not residents of this planet. The person I was looking at was dressed in dark slacks, a white lab coat, and wearing glasses, but I knew he was an alien, and that the language he was teaching me was alien, too. He was emphatic that I needed to learned it and retain it so I can remember it when "the time comes," because it will be my only way to communicate with others who are left, after some big disaster. Allegedly it's stored in energy strips just above my left ear, and they are unable to be found by modern day medical scans.
Some days are DIAMONDS; some days are STONES!