Starting with v1.3 we're providing in-page translation capabilities for other modules. In-line translation edit can occur for any OpenMRS module that uses openmrs:message tag for rendering text on their jsp pages. Basically, there is nothing special with using in-page translation capabilities for other modules, just toggle on translate mode (how to do it you may read here) and start editing by mouse clicking on text message. It becomes in-line editable form with input for entering text, fill your translation into that input field and submit it using Enter key. 
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If you're selecting single language and single source then output will be given as properties file with name specified in the next format: messages_[language-code].properties (for example, messages_fr.properties). If you're selecting for multiple languages and/or multiple sources, then output will be represented as multiple properties files in a ZIP file with each module-specific property file under a folder with source ID as name as it shown on snapshot below:
To read the complete list of features, available with current release, please, have a look at Release Notes section on main module page.
Screenshots for a previous version release can be found here.