Image deletion for contact : Improperly escaped strings break js in somes languages

I'm using civicrm with french translation and the confirmation script to delete contact image is broken.

The original string :
'Are you sure you want to delete contact image.'
is translated by
'Etes-vous sûr de vouloir supprimer l'image du contact.'

The added apostrophe isn't escaped and break js.

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see CRM_Contact_Form_Contact
function buildQuickForm()