How to translate the field label?

until a better solution is found, using #21 and it works.

Indeed changing data type for the field labels from "string" to "label" makes sense, as they should be translatable. It might be something like this:

core.entity_view_display.*.*.*.third_party.entity_print:
  type: sequence
  label: 'Schema for Entity Print third party settings'
  sequence:
    type: label
    label: 'Extra field labels for each export type'

But seems it still will not be possible to edit translation using UI until Entity view/form mode formatter/widget settings have no translation UI 🐛 Entity view/form mode formatter/widget settings have no translation UI Needs review resolved.

For now it possible to use one of 2 solutions:

1. use patch from #21 and translate with user interface translation
2. create translation YAML config files for needed content type display modes manually and import them, for example core.entity_view_display.node.article.default.yml . As I can see, it works even without changes in config schema.

Example of the translation file

third_party_settings:
  entity_print:
    pdf_label: 'Ver PDF'
    epub_label: 'Ver EPub'
    word_docx_label: 'Ver Word Document'

patch from #21 works for me - will do until this is solved