I currently switched from eclipse to android studio. In eclipse I had 2 projects, one android application project and one java project which I included in the android projec
I never tried but Intellij comes with very good integration of Resource Bundles.
Refer this link
http://www.jetbrains.com/idea/webhelp/resource-bundle.html
From the link above
Resource bundle is a set of properties files that have same base name with different language-specific suffixes. A resource bundle contains at least two properties files with similar base name, for example file_en.properties and file_de.properties.
IntelliJ IDEA recognizes properties files, and if two or more properties files with the names that differ only in suffix, are encountered, joins them into a resource bundle. The new node Resource Bundle '(base name)' appears in the Project Tool Window:

You can have these files inside your module or on root as well.