The recommended way to localize your application is to use standard OSGi bundle fragments.
Fragments need to specifiy their fragment host. You can use the Maven Bundle Plugin to create a fragment.
<packaging>bundle</packaging>
[...]
<plugin>
<groupId>org.apache.felix</groupId>
<artifactId>maven-bundle-plugin</artifactId>
<extensions>true</extensions>
<configuration>
<instructions>
<Fragment-Host>com.mycompany.myapp.myapp-mymodule;bundle-version=${myapp.osgi.version.clean}</Fragment-Host>
</instructions>
<versions>
<myapp.osgi.version.clean>${project.version}</myapp.osgi.version.clean>
</versions>
</configuration>
<executions>
<execution>
<phase>generate-sources</phase>
<goals>
<goal>cleanVersions</goal>
</goals>
</execution>
</executions>
</plugin>
Replace com.mycompany.myapp.myapp-mymodule with the Bundle-SymbolicName of the fragment host. Make sure you use the OSGi version, not the Maven version (see the cleanVersions goal).
1. Currently Supported Locales
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en (English; default)
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de (German)