Header labels are not translatable nor configurable

### Expected Behaviour
After translating the content in another language, the header should be translated to the targeted language.
The header label should be configurable somehow.

### Actual Behaviour
The header stays in english and is not configurable content.

#### Steps to Reproduce
Create a language copy of the site and translate it to any language.

#### Sample Code that illustrates the problem
in ```ui.apps/src/main/content/jcr_root/apps/learning/components/header/header.html```

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