It's in English.
It's only for sale in Germany and Poland right now, they come in German and English.
The story is about the government sending tons of choppers towards the center of the Zone, but they all end up crashing all over the zone, and all happen to be spread around the Zone everywhere. You take the role of an ex-master stalker who was hired by the military to go into the Zone and find out what caused all of the choppers to crash, and you help your military and ecologist buddies along the way. There's tons of new shit- a new swamp, a new cordon area, a new Pripyat area, it's not just a new swamp area and the old Zone like in Clear Sky, the entire game was redesigned pretty much. It's amazing. And it doesn't suck like Clear Sky.