The Tongue
Shoes. Sneakers.
Spanish is the mother tongue but many do speak English.
with a sharp tongue
You use your mouth, tongue.
Natives speak in their own tongue, whether it is English or dialect
No; you don't need to split a crow's tongue to enable it to speak. The imitation sounds that crows make come from their throat.
Spain does not speak German as a mother tongue. The official language in Spain is Spanish, also known as Castilian.
To not speak. To remain silent.
The tongue of a dog. While it can wag, dogs are unable to speak or form words.
The tongue is concerned in speech. By assuming different positions in the mouth it alters the shape of the air passage through which pass the sounds made by the vocal cords. For example, if in the middle of saying "a ... a ...ah" the tip of the tongue is placed behind the upper teeth the sound immediately changes to "l".
If you are "fluent" in a language you speak it like you would your mother tongue, you speak it fluently.