Since the real "speaking in tongues" were people speaking in other languages and needed somebody to translate (though many modern supposed ones think it's just making noises) now with google translate if somebody was truly speaking in tongues then it would identify the language and translate it.
Google Translate can put "speaking in tongues" to the test :)
haha I just tested it on myself. It actually doesn't let you speak in "detect language" but I picked french and don't know any french so just imitated it. I must have been speaking in tongues though because it translated what I said as, "is realizing 5 seconds none will know what time it is" lol.