quant aux

Quant aux voisins, tu ne leur dis jamais rien.

As for the neighbors, you never say anything to them.

— The Umbrellas of Cherbourg (1964)

Quant aux enfants il n'y a aucun doute, tu les rendras malheureux.

As for the children, there’s no doubt you’ll make them unhappy.

— Le Miroir (1975)

Quant aux filles, je fais attention.

As for girls, I'm careful.

Quant aux Williams, leurs revenus sont secrets.

As for the Williams, their income is secret.

L'enquête se poursuit quant aux causes de l'accident.

The investigation into the causes of the accident is ongoing.