He makes a sour face and bites his tongue.

WSJ: The Weekend Interview with Alexei Navalny: The Man Putin Fears Most

His own face, as he observed the human carnival, was as inexpressive as his tongue, but his eye told him more than they could guess.

NEWYORKER: The Limner

In the face of its waning importance France enacted silly laws to shore up the mother tongue, such as requiring the use of French in the public square, in advertising, etc.

FORBES: Magazine Article