If you have a personalized ARCHIBUS application, by keeping your translated strings separate from those provided by ARCHIBUS, you are able to upgrade your ARCHIBUS core and applications separately from your own extensions.
To translate your extensions:
The program writes the file in the \schema\ab-system\lang folder. You can rename the file from the default (for example, my-extension-es.lang), to any value, (for example, my-space-activity-es.lang), as long as you preserve the language suffix (for example, "-es") and the ".lang" file extension. The ARCHIBUS program loads all ".lang" files it finds in the \schema\ab-system\lang folder.