eZuce has a tool to help with managing translations for multiple products called LangTool. LangTool keeps all of the needed words and phrases in a database, runs a Google translation on each and displays them for users to see and then update. Any translation that is displayed in grey is an automatically translated entry. If an entry is in white it has been corrected from the original Google translation.
The LangTool java application is available here: http://vibe.ezuce.com/langTool/langTool.zip