During the revival, speaking in tongues was a common phenomena during the meetings, whether for prayer or worship services. There would be loud speaking in tongues with tears and crying. People were convicted and overwhelmed by the Spirit and speaking loudly in tongues, sometimes with interpretation, but most times without.
My understanding about tongues and its use in church gradually shifted with exposure to different churches: Anglican charismatic, Methodist charismatic, Baptist charismatic, Love Singapore meetings and even mega church Pentecostal services. This coupled with theological training on the interpretation of scriptures formed and shaped a nuanced understanding of the usage of tongues in the church. However I found it difficult to put it in words or to explain them simply. Until I came across this video in Adrian Warnock’s blog by Terry Virgo the founder of a network of 600 churches in 50 nations called Newfrontiers. They are Reformed Charismatic and Evangelical small churches. He spoke about the use of speaking in tongues in the church service, and it resonated with me.