Yes but its usally not shown during a service
One fundamental difference they have from other Christian faiths is that they don't believe you receive the Holy Spirit immediately at the time of accepting Jesus Christ as Lord and Savior. They believe that happens some time later and is manifested at that time by speaking in tongues (unknown heavenly languages).
The term is glossolalia, also known as speaking in tongues. The speaking in actual foreign languages is known as xenoglossy. See http://en.wikipedia.org/wiki/Glossolia and http://en.wikipedia.org/wiki/Xenoglossy
You're probably thinking of "glossolalia", though it's not really synonymous with Pentecost. Glossolalia is basically speaking in tongues or an unknown language, which is what they did on the Day of Pentecost -- and many do today. Another word for it is xenoglossia.
Some religions believe that they have the power to speak in tongues which no one but God can understand. This is what is called Priestcraft. There are two ways which are acceptable to God and both are gifts from Him called The Gift of Tongues where a person may be gifted to be able to speak in the language of a people when he has never been able to do so before. When he has delivered his message the gift leaves him.. The other is when a message is being given in the speakes own tongue, the listeners hear him in their own language. Any other way of Speaking in Tongues is of Satan, and usually comes out of the speakers mouth as gibberish, which not even God can understand.
Speaking in tongues is a religious experience. Somebody will talk in tongues because God (the Holy Spirit) is talking through them and the only way people can understand them is when God uses someone to interpret what is said (unless somebody is talking in a different language and somebody else who knows that language can understand them).
Speaking in tongues is supposedly evidence of the Holy Spirit, since no human can really understand what is being said.The apostle Paul was dismissive of those who claimed to speak in tongues, although he was not prepared to alienate those who claimed this ability. He indicated a preference for prophecy, since this at least might be useful. In 1 Corinthians 14:4, Paul says "Whoever speaks in a tongue builds himself up, but whoever prophesies builds up the church." He then goes on to explain what he sees as the futility of speaking in tongues, summarising this in verse 19: "but in the church I would rather speak five words with my mind, so as to instruct others also, than ten thousand words in a tongue."
Unknown.
in the bible there is a story where the presense of God came down and filled the people with the Holy Spirit, when they were filled with the Holy Spirit the spoke in tongues, or a language that the devil and anything evil couldn't understand. in the Pentecostal churches they belive that they to can speak in tounges. I have never heard anyone speak in tounges so i am not sure if the people really do speak in tounges, at those churches, it may be a seeing is beliving type thing.
Unknown, hopefuly not many.
Chell is diagnosed with a special speaking disorder unknown to the player
Believe it or not, its origin (etymology) is unknown.
I believe that a radical is a variable or an unknown variable.