OV = Original Version
OmU = Originalfassung mit Untertitel (original with German subtitles)
DF = Deutsche Fassung (German version)
OmeU = Originalversion mit englischsprachigen Untertiteln (original with English subtitles)
But, I still think that it needs some more clarity. Does a film listing not having any of these abbreviations default to German audio?
Just a few things of this sort.
In my experience, yes. The default is German without subtitles. I have seen the OV and OmU abbreviations a lot of times, but most showtimes don't have anything listed which will mean German.