In the past you got a new orchestra track with each new cast recording, but lately this seems to be less common. Mind you I have not bought many international recordings lately. But it is done
Wicked german and Japan recordings use the broadway recording tracks.
Lion King Dutch, French and Spanish recordings use the German tracks
Both Phantom Korean recordings aswell as the Mexican one use the Canadian tracks.
If you have the actual CD you can sometimes tell as there will be no credits at all for the orchestra on the recording. My guess is it is somewhat a cost saving measure but I also assume that you have to have some contractual thing going on when the first recording is made that allows the producers to reuse and un-credit the tracks.
plus side... more recordings (in theory)
negative side...it is actually nice to hear the score played differently from recording to recording
http://www.flickr.com/photos/27199361@N08/ Phantom at the Royal Empire Theatre