search labels not translated #12

Describe the bug
The applied search filter labels in the badges above the search results are not translated correctly.

To Reproduce

1. apply some filter with known translation https://dspacecris7.4science.cloud/search?page=1&configuration=researchoutputs&query=&f.has_content_in_original_bundle=true,equals&spc.page=1
2. switch to locale de
3. in the badge "true" is displayed
   

Expected behavior
3. We expect the existing values from the language json to be translated
4

  "search.filters.has_content_in_original_bundle.true": "Ja",

Related work
PR will follow soon...
Either normalize the value and also replace ,equals
or
rename the keys to scheme:
search.filters.has_content_in_original_bundle,equals.true