In some extreme circles (the UnitedPentecostalChurch, for example) speaking in tongues is considered the crucial evidence of having the indwelling Holy Spirit, and therefore the salvation of believers who do not speak in tongues is called into question.
The conclusion drawn is based upon the false premise that salvation (accepting the gift of Christ) and Spirit-filled (accepting the gifts of the Spirit) are one in the same. They are not.
The UPC is not a Christian denomination, but unitarian. Their key dogma is the denial of the Trinity: Jesus is His own Father, and the Holy Spirit is the ghost of Jesus come back to haunt us, and Jesus was raving to Himself in the Garden of Gethsemene -- there was no one on the other side of that conversation!
That is not just a United Pent Church thing, it is a Bible thing.....who cares what a denomination says, what about what the BIBLE says