If you want to speak in unknown tongues, you can speak as much as you can in prayers or in anything that you do but be sure you have repented because you cannot use the speaking in tongues as the basis of your salvation. If you do that, you will be one of those who will say in the last days, “Did we not speak in tongues?” “Did we not prophesy?”
“Did we not use the gift of the Spirit?” (Matthew 7:21-23)
The only thing that is acknoweldged in Heaven is repentance. “Repent for the Kingdom 0f Heaven is at hand,” (Matthew 4:17) as my Father said in the Jewish Setting.
Now, His Son in the Gentile Setting says, “Repent for the Kingdom of Heaven is here.”
Repentance is a language understood in Heaven. You can go ahead, speak in tongues, as long as you repent. But do not use speaking in tongues as your basis for salvation because you will only be disappointed.