You can find all current language files here:

https://git-wip-us.apache.org/repos/asf/openmeetings.git/KEYS?p=openmeetings.git;a=tree;f=openmeetings-web/src/main/java/org/apache/openmeetings/web/app;hb=HEAD

Just take one file and translate it to your language.

Import and export of Language Files

• Use the LanguageEditor for translation
• with the LanguageEditor you can import and export Language Files