Hey @Reuben_J I speak about 4 languages fluently and can understand at least another 4…
So I can understand what you are saying on various levels

hahaha
What you do is something that came naturally to me, I wouldn’t call it Xenoglossia/Glossolalia because that is also reducing in a sense…Do I have a gift? What defines a gift?.. Do I consider it, whatever it is, God given? Yes!..Nothing extraordinary really [and yet, a privilege both permanent and extraordinary, isn’t it?] I just moved about during my life and was exposed to several languages and good teachers.
Now, do I “play around” and “experiment” with languages normally? Yes, everyday I’m mentally exercising myself…I remember language classes where I was relating morphological structures and etymology across three or four languages simultaneously and when I spoke about it both teachers and classmates were outraged and ordered me to shut up…Only much much latter did I discover linguistics and understood that I was actually quite right and inducing linguistic laws from experience.
Now, what you describe should be seen in the following light (here you need to exert your understanding): Interview a practitioner of Judo, Wrestling or Jiu-Jitsu. Ask them exactly what they felt during the first classes…They will answer:“I felt a profound change in my innermost self like I had never felt in my life”. Ok, why do they describe this, or what are they describing? The moment you stop standing and go into “Ne Waza” ground technique you start not only to use intensively muscle groups you never used, but also areas of you neurology: intense psychomotor like you had never experienced.
The same applies to the linguistic phenomenon you describe. How? You free yourself! Any language is also a set of limitations and rules. The moment you start speaking freely using phonetics (grapheme/morpheme) freely you use psychomotor and entire areas of your neurology you might never use in your native tongue. [Any daily activity can be blessed, sanctified, making Holy something that by it’s nature is not apriori Holy]. And so is this exercise if dedicated to praising the Lord. Simply for being alive, to act, to express, rapture…Gloria.