To contribute large translation sets (translated .properties files) to Babel:
Once attached, the Babel team will review your contribution and submit it through the Eclipse Legal process. If it is approved, your contribution will be imported into the Babel server and included in the subsequent nightly build.
Translated .properties files should be structured as below for importing. Replace
language\ eclipse\ plugins\ org.eclipse.pluginName\ plugin.properties org\ eclipse\ etc... language\ eclipse\ plugins\ org.eclipse.pluginName\ plugin.properties org\ eclipse\ etc...
Here is an example of a French translation set: