Comment by spankibalt
3 hours ago
East German here. I have never met East Germans who called their home country Ostdeutschland before the Wende; that was very much a West German thing, and even then not as widespread as one might think (i. e. "DDR" was the much more common name amongst them). After the Wende it became (more of) a thing for Easterners as well, especially in context with the identity: Ostdeutsche(r).
Bulgarian here - for me DDR/GDR is well known. Also FRG.
Romanian here, the same applied here on all counts. Back in the '80s and going into the '90s we also used to name an infamous and poor Bucharest area as RFG (FRG in English), which was the capital letters of those three neighborhoods taken together as an acronym.