Display translated document type label when mouse over icon in listings

When the interface is in French, in a list (like in a Workspace or Folder), if I hover over an item icon, I see the English version of the tip.

If I look at the produced html, the img tag contain the alt="Folder" and title="Folder" attributes.

For the document-type we created, we see a translated version.

Shouldn't we also see a translated version for the Main document-types? I checked and the values are present in the messages_fr.properties file.

Affected types :

File : Fichier
Picture : Image
Folder : Dossier
Picturebook : Livre d'image
Workspace : Espace de travail
Ordered folder : Dossier ordonné

Thanks to "Société Transports Montréal"