Tongues

Tongues is an indecipherable supernatural language given to a believer in Jesus Christ with the indwelling of the Holy Spirit, according to Pentecostal belief within Christianity. Its main purpose is to be a "prayer language" for the believer, though it is only the person's spirit that prays in this language instead of the person's mind.

Empath: The Luckiest Smurf stories
In the EMPATH: The Luckiest Smurf story series, Tapper is the only Smurf known so far to be able to "speak in tongues", though he prefers to pray normally in the Smurf language.