The customer observed that field group name translations (configured according to the documentation) are not taken into account.

Steps to reproduce:
1. Add a new language in the BO e.g. ger-DE.
2. Add this language under admin_group.languages key in ezplatform.yml.
3. Configure field groups as follows:

ezplatform:
    repositories:
        default:
            fields_groups:
                list: [metadata, content, contact]

4. Add a new file translations/ezplatform_fields_groups.de.yaml and put there the following lines:

metadata: 'Metadaten'
content: 'Inhalt'
contact: 'Kontakt'

5. Clear the cache and log into the Back Office.
6. Create a new CT test and add 3 text lines. Assign each text line to a different group/category (metadata, content, contact).
7. Create a new content object of test CT in ger-DE language.

Result:
The group names are not translated into German.

Note:
Setting the default language of the BO to German using User Preferences and ezplatform-i18n/ezplatform-i18n-de_DE does not make any difference.