My nephew Timofey has some trouble accepting the arbitrary authority of adults. In this case, while the mother was away, an older man said something to him in an authoritative voice. Timofey’s reaction was to try and search for his mother, and - after that proved ineffective - to discharge his emotions in a loud, angry but non-confrontational way. He just screamed some meaningless speech-like sounds into the air.
Glossolalia - speaking in tongues - is practiced in some religious communities that consider it to be a divine language.
The people of Deepmind trained it’s neural networks to find a better model of speech generation. And now, without an input it speaks in tonges (scroll down to “Knowing What to Say”).
Perhaps it is a good way for a computer to get emotional. In case an older man blindly assumes authority over it.