External career site (minimal template): How to translate a filter name (DFF)

Summary:

We use 2 DFF as filter in our external career site, I can translate the value in the list but don't find how to translate the name of the DFF

Content (please ensure you mask any confidential information):

We use 2 DFF as filter in our external career site, I can translate the value in the list but don't find how to translate the name of the DFF

for example:

and then how to translate "Nature de contrat" to "Type of employment contract"?

The transalation is ok in Set up & Maintenance / Job requistion / Job requisition descriptive flexfield,

Thank you for your help