Email Notification for a copied profile type is not displaying custom labels

Summary:

We have configured a Custom Profile type for Training history as we don't use Learn module (see my question: How to record worker's training history (in Person Talent Profile) without Learning module?).

Content (please ensure you mask any confidential information):

We have done the following (see also attached Doc.):

• Took a copy from Work History Profile type template
• Renamed some fields:
  • Employer Name > Training
  • Job Title > Trainer
  • Starting Compensation > Length in days

Now, when an Email notification is sent e.g. to the Line Manager for approval, Employer name and Job Title are displayed in the Email notification instead of the custom labels (Training and Trainer).