1. So you are stating the tongues proves the existence of God?
2. Glossa" (glwssa), which is the word used to designate the languages discussed in the letter to the Corinthians, means either the tongue (the physical organ in our mouth) or a language accessible to human understanding such as a foreign language, but not the phenomena such as glossolalia. Therefore the issue at the church of Corinth was the existence of foreign languages within a congregation and how they should be managed, a translator was required otherwise they were to keep silent, this was not the gift in Acts of the Holy Spirit.
2. Glossa" (glwssa), which is the word used to designate the languages discussed in the letter to the Corinthians, means either the tongue (the physical organ in our mouth) or a language accessible to human understanding such as a foreign language, but not the phenomena such as glossolalia. Therefore the issue at the church of Corinth was the existence of foreign languages within a congregation and how they should be managed, a translator was required otherwise they were to keep silent, this was not the gift in Acts of the Holy Spirit.
tongues is proof of God existence? No. Are tongues one of the gifts of the Holy Spirit where HE uses the believer in? Yes. Are the gifts does to show God is working in the life of the believer? Absolutely yet tongues is not the only gift which does that.