I would say not so much that they have a demon but are following after a lie of a lying spirit. Christians can be deceived to believe a lie. Only God will not be deceived according to His truth. He is no longer bringing any new revelations as an interpretation in another language.What we had in part up until the last chapter ,Revelation,we now have the whole or perfect .
The idea that tongues (the interpretation from God from one language to another) in an onward conversation between two, God through the prophet Peter who does not speak his own words but does speak the words God put on his lips and the man who has been given an interpretation from God not from Peter in his own language.
I would offer it was not evidence Peter had the Holy Spirit any more than would be be evidence Balaam's donkey which God used to represent a unbeliever, as a unclean animal, that the donkey had the Holy Spirit when God put his words in its mouth .as if God was served by human hands/will to begin with .
It has nothing to do with the speaker used as a prophet, as if tongues was attributed to Peter.It is not a biblical teaching I believe.
There simply is no outward sign as evidence that a person has the Holy Spirit. A changed heart yes. They are spiritul unseen gifts not after the flesh. The Jews sought after signs to show their rebellion to God.
Prophecy is for those who believe. Again God is not longer bringing any new revelations in any manner.
Matthew 12:39 But he answered and said unto them, An evil and adulterous generation seeketh after a sign; and there shall no sign be given to it, but the "sign of the prophet Jonas":
That sign, three days in the heart of the earth was finished before God finished writing any new revelations in His book. today we have the whole/perfect
I would ask do we need more than He has revealed in the bible?