YaBB 3 Documentation
This is the directory with the language files. Every language has it's own folder and will be read out automatically by YaBB.
They are normal modules and export the global $VERSION variable which gets automatically filled by the CVS.
All text strings are values in a constant array with a unique name preferable something with TXT in it. Strings should be splitted by the functionality they belong to. If you are a mod writer please create your own file in the languages directory.