To install two different language versions of OpenOffice.org on the same MacBook Pro, I did the following. I was installing the Japanese and English version.
| $ cd /Applications/ $ mv OpenOffice.org.app "OpenOffice.org ja-JP.app" |
| $ cd /Applications/ $ mv OpenOffice.org.app "OpenOffice.org en-US.app" |
Now you have two OpenOffice.org links in Applications and both can be started and run independently.