The Greek word for "tongues" in the New Testament refers to languages, like Greek, Hebrew, etc.
The word "tongues" does not refer to unconscious gibberish or supposed "languages" that humanity does not understand.
"There are, perhaps, a great many kinds of languages in the world, and no kind is without meaning." 1 Cor 14:10
I myself used to "speak tongues" (the gibberish kind) and they were definitely not a gift from the Holy Spirit, which some allege the ability is. It was demonic in nature, and thankfully, God delivered me from it. If you practice speaking such tongues, you should stop, as soon as possible.
God bless you all, and guide you according to His perfect will. In Jesus' name. Amen.