If you can't get your Rosetta applications to open and they only bounce in the dock, then try this.

Quit all open applications.

Open Activity Monitor. This is found in /Applications/Utilities

Pick Administrator Processes from the pull down.

You should see a process called translated. You may also see a process called translate.

Highlight them and click the red quit process button at the top of the screen.

Choose Quit. The process should now end and be gone from the list.

You should now be able to open your Rosetta applications.