situation is not super nice, but in general several problems exist,

- some files do not include any license, assumption is unless specified
  explicitly they follow same license as the source package
  (GPL-3.0-or-later).
- most files do not include the proper copyright statement, I have
  specified KDE Localization team as copyright contact.
- license files do not follow SPDX headers, so we need to add them in
  dep5.

I will start a thread in kde-core-devel / kde-i18n-doc mailing list
about licensing situation once 0.2 release is out.