How should these translated takeoff and climb settings be interpreted?
12 degrees nose up


Since it says this comes after the ground roll, it sounds like this is the pitch you rotate to when you reach rotation speed. You then hold this pitch for the initial climb out.


  1500 feet; decrease power/reduce engine thrust power


In English, generally "power" is used on propeller aircraft, and "thrust" used on jet aircraft. Other languages might not translate exactly. On a turboprop airplane, you would have power levers, which you use to select a power setting. At this point, you would decrease the power setting to a climb/continuous setting.


  climb speed


This just means you will fly whatever speed you plan in climbing at. This would depend on the aircraft, and the flight. Especially larger, higher performance aircraft will have some standard "climb speed" that is used during climb, to balance ground speed and rate of climb. "Cruise climb" may be used to describe a slower climb where emphasis is placed on a higher ground speed. In smaller aircraft there may be less performance margin. This wording may also be leaving it open, as on some flights you may want best rate/angle of climb, others would use a regular climb speed.