Taking a guess at the parties:
DPN: Demokratisches Partei Nord-Dakotas
SDP: Sozialdemokratisches Partei
BBN: Bäuerliches (something) Partei
EPN: Evangelisches Partei Nord-Dakotas
UPN: Unabhängiges Partei Nord-Dakotas (no idea, from the brown I'm guessing it's vaguely right-wing)
LDP: Liberaldemokratisches Partei
DPN: Deutsches Partei Nord-Dakotas (politics used to be divided on language lines, like in Russian Finland)
SDP: Correct
BBN: Bauernbund Nord-Dakotas
EPN: Englisches Partei Nord-Dakotas (have bled most of their support to the BBN and SDP now that bilingualism is accepted)
UPN: Ureinwohnerpartei Nord-Dakotas (native interest group - routinely win one district in the north-central parts of the state, but otherwise fairly unimportant)
LDP: Correct (they're completely irrelevant because of FPTP)
Two things should be pointed out regarding the box:
- Seat notations aren't shown because I didn't find a satisfactory way of showing them - I tried editing the hemicycle pie chart that usually comes along with the bar graph, but my German apparently isn't good enough to let me find the help page for that.
- North Dakota isn't entirely German-speaking - indeed, English was seen as the more refined language to use until about the 1970s. It's somewhat akin to the Quebec situation.