One of the elders and retired teachers offered me to teach me 'Pasa Boran' - the ancient language. I politely declined, I'd have to substantially improve my Thai first.

I wonder if this is Pali, or a historical Thai language?

Apparently some ghosts speak Pasa Boran too, according to a medium, but it sounded like some incoherent nuttering to me, even more so than some of the late night posts on TD.