on his face

The sweat stood on his face.

La sueur perlait sur son visage.

Anger showed on his face.

La colère se lisait sur son visage.

Look at the reaction on his face when we bring up a price.

Regardez sa réaction quand on évoque le prix.

A cold wind was blowing on his face.

Un vent froid lui fouettait le visage.

He had a queer expression on his face.

Il avait une expression étrange sur le visage.

Tom had a smile on his face.

Tom avait un sourire aux lèvres.

A smile on his face, but what a tragedy!

Un sourire aux lèvres, mais quelle tragédie !

— Little Vera (1988)

He had this fucking goddamn grin on his face.

Il avait ce putain de sourire narquois sur le visage.

— Mystic River (2003)

He always has a smile on his face.

Il a toujours le sourire aux lèvres.

Keep an eye on the reaction on his face when we bring up a price.

Observez attentivement sa réaction lorsque nous aborderons la question du prix.