Obviously with the release of Blood and Iron there's been a jump in the number of Prussian regiments in game (understandable, since the Prussians won), and with that most regiments have adopted a ranking structure similar to that employed by the North German Confederation and South German states of Baden, Württemberg, Bavaria and Hesse-Darmstadt. In-game, the II. Königlich are representative of a Bavarian unit, and as a result use the current ranking system;
Spoiler
Generale
Generalfeldmarschall
Generaloberst
General der Infanterie / Kavallerie / Artillerie
Generalleutnant
Generalmajor
Stabsoffiziere
Oberst
ObLt/OLt - Oberstleutnant
Mjr/Maj - Major
Hauptleute
Hptm - Hauptmann (Captain)
Subalternoffiziere
OLt - Oberleutnant (First Lieutenant)
Lt - Leutnant (Lieutenant)
FwLt - Feldwebelleutnant (Second Lieutenant)
Unteroffiziere
Fhr - Fähnrich
OffzSt - Offiziersstellvertreter
Fw - Feldwebel (Sergeant-Major)
Vfw - Vizefeldwebel (Junior Sergeant-Major)
Sgt - Sergeant
Uffz/Kpl - Unteroffizier/Korporal
Mannschaften
OGefr - Obergefreiter (Senior Lance Corporal/Second Lance Corporal)
Gefr - Gefreiter (Lance Corporal)
Knr - Kanonier (Gunner)
Rek - Rekrut (Recruit)
Special appointments
Pnr - Pioneer
It's worth noting that different nations used different names for the standard rank, generally serving as equivalent to Private. These were Musketeer (Musketier - Prussian army infantry regiments), Infantryman (Infanterist - Bavarian army infantry regiments), Soldier (Soldat - Saxon army infantry regiments), Gunner (Kanonier - foot artillery), Pioneer (Pionier - pioneer branch). Other unit-specific enlisted ranks were: Fusilier (Füsilier), Grenadier (Grenadier), Huntsman otherwise Light-Infantryman (Jäger), Dragoon (Dragoner), Hussar (Husar), Cuirassier (Kürassier), Uhlan (Ulan), Fusilier Guard (Garde-Füsilier), Grenadier Guard (Garde-Grenadier), etc.
http://en.wikipedia.org/wiki/German_Army_%28German_Empire%29#Ranks_of_the_Imperial_German_ArmyI don't really know much about the French ranking structure, so I can't really say what the equivalent structure is. However, the list provided here is my personal interpretation of the structure and function. I'm more than likely wrong, but hey, it's my first time sorting out a rank structure outside of the British Army.
Just a little addition; here are a pair of Bavarian military medals, as well as a link to Bavarian and German military orders, decorations and medals.
http://en.wikipedia.org/wiki/Category:Orders,_decorations,_and_medals_of_Bavaria
http://en.wikipedia.org/wiki/Category:Military_awards_and_decorations_of_Germanyhttp://en.wikipedia.org/wiki/Military_Merit_Cross_%28Bavaria%29
http://en.wikipedia.org/wiki/Military_Merit_Order_%28Bavaria%29
Also edited the first post to include Crozade's list!