Hi Jan,

Of course.

Thread on the Tagging mailing list:
https://lists.openstreetmap.org/pipermail/tagging/2017-August/033148.html

Thread in the Hungarian group:
https://groups.google.com/forum/#!topic/openstreetmap-hungary/scCgOWB0JpQ
(This includes the proposed osmChange file.)

The new keys:
osm.wiki/Hu:key:HU:edid
osm.wiki/Hu:Key:HU:hu-go

I'm aware that OSM cannot find these keys from the editor so I'll have to create a few reference page in the OSM Wiki.