The powder bit at his tongue, as if it had sharp little teeth of its own.

Anyone who suspects they might have bad breath can check by looking at their tongue.

He looked daggers at his map and its shortening black tongue.

He sucked at Zach's tongue and pulled it deep into his mouth.

He thought as her lips parted and she flicked at his tongue with hers.

"Look at its tongue," Cynthia said in a strange, dreaming voice.

One of the humans manages to fire at Scorponok's tongue.

Instead she bit at his plunging tongue and was bitten in return.

All a European doctor wanted was to look at your tongue and say "Where is the pain?"

They came already knowing Federation Standard so we can't guess at their native tongue.