I translated the Kicad user interface into Hungarian.
The problem is that the “Poedit” program indicates an error while importing texts (attached image).
With problems about translations i think you should go to the bugtracker or mailing list. (It looks like pull requests are handled via github. So it might also be possible to use issues on that repo to communicate with other translators.)
Drag and drop should work or type in the html tag. (use the later if the image is already somewhere on the web)