Phenomonal Paranormal speak in forked tongues

I watched about ten minutes of two paranormal investigation TV programs last week.
One London based, the other based in the USA.
Both recorded what they saw and both discovered ghostly voices on the tapes.
This was rather fascinating as the ghosts all spoke modern English.
One may be excused but the other...a native Amercan Indian from an ancient burial ground?

Is there anyone there who can explain and answer these questions?
How did he speak in our language?
Do paranormal voices translate for their audience?
Would they have spoken in French for visitors from France for example?