lingua Englisch:

Mother tongue.

If your tongue turns black, you should probably see a doctor.

Many doctors look at your tongue first when they begin an examination.

I'll try to stay on your good side, lest I get cut in two by that acerbic tongue of yours.

Do not fear the heavens and the earth, but be afraid of hearing a person from Wenzhou speak in their local tongue.

Foreign accent syndrome is an as-yet unexplained medical condition where the patient can no longer pronounce his mother tongue correctly and seems to have a foreign accent.

A woman whose tongue grew out of the roof of her mouth soon found herself surrounded by overeager linguists.

A sharp tongue is the only edged tool that grows keener with constant use.

German punctuation is pedantic, English punctuation is chaotic, and for Esperanto Dr. Zamenhof suggested we look towards our mother tongue as a guideline. Go figure!

A linguistics student swallowed her own tongue after attempting the legendary glottal approximant.

He lay there for a moment before walking away with his tongue hanging out of one side of his mouth.

By the look in his eye I could tell that he was speaking tongue in cheek.

A dream... I was trying to explain to St. Peter, and was doing it in the German tongue, because I didn't want to be too explicit.

If you sleep on your back it's easier for your upper airway to be obstructed because your tongue, uvula, etc. slip towards the back of your throat.

Nowadays UNESCO recommends that everybody should use three languages: the mother tongue, the language of local communication and the international language.